Revision as of 05:52, 23 August 2016

Labjournal

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Samples

Transformation of E. coli XL1 blue with Phytochrome B (2–908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3)

Investigator: Jeff, Rosario

Aim of the experiment: Transformation of Phytochrome B for protein fusion

Procedure:

CaCl₂-competent E. coli XL1-Blue cells were taken from the stock in –80 °C freezer and gently thawed on ice

2 µl of DNA was added to 100 µl of competent cells and gently mixed

30 min incubation on ice

5 min heat shock at 37 °C

Added 1 ml LB medium to each tube

Incubation for 45 min at 37 °C in the 180 rpm cell-culture shaker

100 µl of the cell suspension was plated on one chloramphenicol plate

The rest were centrifuged for 1 min at 13,000 rpm and the supernatant was dicarded

The pellet was resuspended in 100 µl of LB-medium and this concentrated cell suspension was plated again on a new chlorampenicol plate.

Miniprep of pTUM100 with pGAL, pTEF1, pTEF2, pADH and RFC25 compatible RFP generator

Investigator: Jeff, Rosario

Aim of the experiment: Miniprep of pTUM100 with pGAL, pTEF1, pTEF2, pADH and RFC25 compatible RFP generator

Procedure:

Miniprep was performed after manufacturer's protocol (QIAprep Miniprep, QIAGEN)

Sequencing of RFP-Generator (RFC25, pSB1C3)

Investigator: Jeff, Rosario

Aim of the experiment: Sequencing of RFP-Generator (RFC25, pSB1C3)

Procedure:

Sequencing batch were prepared after manufacturer's protocol. (15 µl of plasmid DNA (50 - 100 ng) and 2 µl sequencing primer)

Picking of of E. coli XL1 blue with Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3)

Investigator: Jeff, Rosario, Florian

Aim of the experiment: Picking of of E. coli XL1 blue with Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3)

Procedure:

pSB1C3 plasmid with BBa_K801031 (PhyB 2 - 908 aa, RFC25): Colonies were picked from chloramphenicol plates.

Picked pipette tips was transferred into cell-culture tubes with air-permeable, sterile cover. Each tube contain 4 mL of LB-medium + 4 µL chloramphenicol(1000x).

4 colonies were picked.

These tubes were transferred in a cell culture shaker at 37 °C and were incubated overnight

Analytical digestion and gelelectrophoresis of RFP-generator (RFC25, pSB1C3, P4 & P5)

Investigator: Jeff, Rosario, Florian

Aim of the experiment: Analytical digestion and gelelectrophoresis of RFP-generator (RFC25, pSB1C3, P4 & P5).

Procedure:

Batch for analytical digestion for P4 with NgoMIV+AgeI-HF

volume	reagent
2.5 µl	Plasmid DNA P4
2 µl	NEBuffer 4 (10x)
0.25 µl	NgoMIV (10 U/µl)
0.25 µl	AgeI-HF (20 U/µl)
15 µl	ddH2O
=20 µl	TOTAL

Batch for analytical digestion for P5 with NgoMIV+AgeI-HF

volume	reagent
2.5 µl	Plasmid DNA P5
2 µl	NEBuffer 4 (10x)
0.25 µl	NgoMIV (10 U/µl)
0.25 µl	AgeI-HF (20 U/µl)
15 µl	ddH2O
=20 µl	TOTAL

Incubation for 90 min at 37 °C.

Analytical gelelectrophoresis was performed at 90 V for 60 min.

Results:

1 kbp ladder DNA ladder	P4	P5
	Mutation successful	Mutation successful!

Parts are compliant and do not contain RFC25 forbidden restriction sites.

500px

Sequencing of pTUM vectors with pGAL, pADH, pTEF1, pTEF2

Investigator: Jeff, Rosario, Florian

Aim of the experiment: Sequencing of pTUM vectors with pGAL, pADH, pTEF1, pTEF2

Procedure:

Sequencing batch were prepared after manufacturer's protocol. (15 µl of plasmid DNA (50 - 100 ng) and 2 µl sequencing primer).

The different vectors we sequenced received the following barcodes:

- ADH in pTUM100: FR01002265

- TEF1 in pTUM100: FR01002266

- TEF2 in pTUM100: FR01002266

- GAL in pTUM100: FR01002268

Sequencing of TEF2 in pTUM100 was not interpretable. The other sequences were consistent with the sequences in the parts registry.

Miniprep of Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3)

Investigator: Jeff, Florian

Aim of the experiment: Miniprep of Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3).

Procedure:

Miniprep was performed after manufacturer's protocol (QIAprep Miniprep, QIAGEN)

Analytical digestion and gelelectrophoresis of Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3), P7 - P10

Investigator: Jeff, Florian

Aim of the experiment: Analytical digestion and gelelectrophoresis of Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3), P7 - P10.

Procedure:

Batch for analytical digestion for P7 with NgoMIV+AgeI-HF

volume	reagent
2.5 µl	Plasmid DNA P7
2 µl	NEBuffer 4 (10x)
0.25 µl	NgoMIV (10 U/µl)
0.25 µl	AgeI-HF (20 U/µl)
15 µl	ddH2O
=20 µl	TOTAL

Batch for analytical digestion for P8 with NgoMIV+AgeI-HF

volume	reagent
2.5 µl	Plasmid DNA P8
2 µl	NEBuffer 4 (10x)
0.25 µl	NgoMIV (10 U/µl)
0.25 µl	AgeI-HF (20 U/µl)
15 µl	ddH2O
=20 µl	TOTAL

Batch for analytical digestion for P9 with NgoMIV+AgeI-HF

volume	reagent
2.5 µl	Plasmid DNA P9
2 µl	NEBuffer 4 (10x)
0.25 µl	NgoMIV (10 U/µl)
0.25 µl	AgeI-HF (20 U/µl)
15 µl	ddH2O
=20 µl	TOTAL

Batch for analytical digestion for P10 with NgoMIV+AgeI-HF

volume	reagent
2.5 µl	Plasmid DNA P10
2 µl	NEBuffer 4 (10x)
0.25 µl	NgoMIV (10 U/µl)
0.25 µl	AgeI-HF (20 U/µl)
15 µl	ddH2O
=20 µl	TOTAL

Incubation for 90 min at 37 °C.

Analytical gelelectrophoresis was performed at 90 V for 60 min.

Results:

1 kbp ladder DNA ladder	P7	P8	P9	P10
	Part is correct	Part is correct	Part is correct	Part is correct

500px

Transformation of E. coli XL1 blue with

Investigator:

Aim of the experiment: Transformation of E. coli XL1 blue.

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

µl of DNA was added to 100 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of µl LB-medium to each tube.

The cell suspension was plated on ampicillin plates (inclusive rescue plate) and incubated over night at 37 °C in the cell-culture shaker.

Week 1, May 16th - May 22nd

Monday, May 16th

Streptavidin Plasmid Check

Investigator: JB, LK, JH

Aim of the experiment: Verify cloning

Procedure:

MiniPrep following manufacturer's protocol (QIAprep MiniPrep, Qiagen) (4 clones each of pSA1, pSAm1 in pASK75)
Analytic digestion with 0.25 µL XbaI, 0.25 µL HindIII (HF), 1 µL SmartCut Buffer, 5 µL plasmid DNA, 3.5 µl H₂O
5 µL analyzed in gel electrophoresis (1% agarose)

Results: Successful cloning verified. Stored at –20 °C

Lane 1: 5 µL Thermo Fisher, 1 kb ladder

Lanes 2–9: 5 µL digestions of P6–P13, band of SA (mut1) at about 300 bp, band of digested plasmid at about 3,000 bp

Streptavidin Expression: Transform BL21

Investigator: JB, JH

Aim of the experiment: Express pSA1 and pSAm1 in E. coli BL21

Procedure:

Transformation into competent E. coli BL21 according to protocol of P6 and P10

Results: Plates (LB Amp) in incubator (37 °C) for further processing

Tuesday, May 17th

SDS Gel Analysis

Investigator: CG

Aim of the experiment: Analyze collagen 1/2, eGFP, fraction 30 of egg precipitation via SDS gel

Procedure:

Mixed 80 µL samples with 20 µL SDS buffer

Heated at 95 °C for 10 min

1 d staining, 1 d unstaining

Results: Successful cloning verified. Stored at –20 °C

Lane 1: 8 µL marker (Thermo Fisher #26610)

Lane 2: Fraction 30 (IEC), 3 µL, band at 35 kDa, avidin expected at 16 kDa

Lane 3: eGFP, 12 µL, band at 27 kDa, eGFP expected at 27 kDa, many impurities

Lane 4: Collagen 1, 12 µL, no sharp band

Lane 5: Collagen 1, 12 µL, no sharp band

$Muc16 SDS gel analysis fraction 30 of egg-precipitation.png$

MiniPreps pSb1C3–AviTag, –A3C5 and pASK75–(SA1), –(SAm1)

Investigator: CR, CG

Aim of the experiment: Verify cloning

Procedure:

MiniPrep was performed following manufacturer's protocol (QIAprep MiniPrep, Qiagen)

Analytic digestion with 0.25 µL XbaI, 0.25 µL HindIII (HF) for pASK plasmids and 0.25 µL NgomIV, 0.25 µL AgeI (HF) for pSb1C3 plasmids, 1 µL SmartCut Buffer, 5 µL plasmid DNA, 3.5 µL H₂O

5 µL on 1% agarose gel electrophoresis

Results: Successful cloning verified for pASK plasmids. Repeat pSb1C3 plasmids. Stored at –20 °C

Lane 1: 5 µL Thermo Fisher, 1 kb Ladder

Lane 2: 5 µL digestion of pSb1C3–AviTag

Lane 3: 5 µL digestion of pSb1C3–A3C5

Lane 5: 5 µL digestion of pASK75(SA1), EB elution

Lane 6: 5 µL digestion of pASK75(SAmut1), EB elution

Lane 7: 5 µL digestion of pASK75(SAmut1), H₂O elution

Inoculation of Pre-Culture with BL21 (pASK75 (SA1)) in LB Medium

Investigator: CR

Aim of the experiment: Pre-culture for streptavidin expression in TB medium

Procedure:

Added 50 µL ampicillin to 50 mL LB medium

Picked colonies from BL21 (pASK75 (SA1))

Inoculated LB medium

Incubated at 30 °C overnight

Wednesday, May 18th

Repeat Analytical Gel of pSb1C3–AviTag, –A3C5

Investigator: CG, CR

Aim of the experiment: Verify cloning

Procedure:

Analytic digestion with 0.25 µL NgoMIV, 0.25 µL AgeI (HF) for pSb1C3 plasmids, 1 µL SmartCut Buffer, 8.5 µL plasmid DNA
10 µL analyzed in gel electrophoresis (2% agarose)

Results:

Inoculation of BL21 (pASK75 (SA1)) Culture in 2 L TB Medium and Induction of Streptavidin Production by Addition of Tetracycline

Investigator: CR

Aim of the experiment: Produce streptavidin

Procedure:

Ampicillin (2 mL) was added to the medium (1:1000)
The pre-culture (50 mL) was poured into the medium
Culture incubated at 37 °C and 140 rpm until OD₅₅₀ reached 0.5
To induce streptavidin expression, anhydro-tetracycline (200 µL) was added to the culture (1:10,000)
The culture was incubated at 37 °C and 140 rpm for 4 hours

Results: Streptavidin expression by BL21

Expression and Harvest of Streptavidin (pASK75 (SA1)) in BL21 in TB Medium

Investigator: CR, JB, JH

Aim of the experiment: Recombinant expression and purification of streptavidin

Procedure:

After expression, cultures were transferred into centrifuge tubes and spun down in the centrifuge (4 °C, 5000 rpm, 20 min, F4X1L rotor)
The supernatant was discarded, and the pellet was transferred into a beaker of sufficient size and resuspended in Tris Buffer B cooled to 4 °C (50 mM Tris/HCl pH = 8.0, 1 mM EDTA)
The solution was homogenized in the PANDA (ask supervisor)
The resulting lysate was transferred into centrifuge tubes and spun down (4 °C, 18,000 rpm, 10 min, XX34-rotor). The supernatant was discarded, and the pellet was resuspended in 6 M Gua-HCl (pH = 1.5) at 4 °C overnight.

Dialysis of eGFP

Investigator: NA, JH, CR

Aim of the experiment: Purify eGFP

Procedure:

eGFP was thawed on ice
eGFP was then poured into a dialysis hose (cut-off 14 kDa)
The hose was then placed in ice-cold Tris/HCl 20 mM pH 8.0
Dialyzed at 4 °C overnight (XX34 rotor). The supernatant was discarded, and the pellet was

MiniPrep of quickchanged pNGAL146-A2 EspP

Investigator: NA

Aim of the experiment: Extraction of pNGAL146-A2 plasmid from XL1 blue

Procedure:

MiniPrep was performed after manufacturer's protocol (QIAprep MiniPrep, Qiagen)

Sequencing of P14 (Avi-Tag), P15 (A3C5) & P19 (Quick change (QC) EspP in pNGAL-A2)

Investigator: CR, NA

Aim of the experiment: Sequencing of P14 (Avi-Tag), P15 (A3C5) & P19 (Quick change (QC) EspP in pNGAL-A2)

Procedure:

Sequencing batches were prepared after manufacturer's protocol (15 µL plasmid DNA (50-100 µM) and 2 µL sequencing primer)
The different plasmids we prepared received the following barcodes:
P14 : FR11326653
P15 : FR11326655
P19 (K4): FR11326654
P16 (K1): FR11326652
P17 (K2): FR11326651
P18 (K3): FR11326650

Digestion of P16 , P17, P18 & P19 (all QC EspP in pNGAL-A2) with AgeI & HindIII + analytical gel

Investigator: NA, JH, CR

Aim of the experiment: Verification of success of quickchange

Procedure:

analytic digestion with: 0,25 µl HindIII (HF), 0,25 µl AgeI (HF), 1 µl SmartCut Buffer, 500 ng plasmid-DNA, fill up with ddH2O (Vtotal= 10µL)
10 µl on 2% agarose gel for electrophoresis

Results: No signal at 600 bp --> quickchange seems to be successful (waiting for sequencing)

Thursday, May 19th

Re-Sequencing of P19

Investigator: CR

Aim of the experiment: Re-Sequencing of P19

Procedure:Sequencing batches were prepared after manufacturer's protocol (15 µL plasmid DNA (50-100 µM) and 2 µL sequencing primer)

The different plasmids we prepared received the following barcodes:

P19 (K4): FR11326649

Cloning of A3C5 and Avi-Tag into pSB1C3

Investigator: CG

Aim of the experiment: Re-Trafo of pSB1C3 RFP for later on: digestion, dephosphorylation and cloning

Procedure: transformation according to protocol of P4 E. Coli XL1

Result: plates (LB Cam) in incubator for further processing (37 °C)

Streptavidin refolding

Investigator: JB

Aim of the experiment: Refolding of denaturated Streptavidin

Procedure: After the pellet had almost completely dissolved in 6M GdmCl, the solution was spun down (4°C, 20 mins, 18,000 rpm). The supernatant was transferred carefully into a falcon tube and the pellet was cast away. Via a hydraulic pump (flow rate: 2x10 ml/min) the lysate was transferred Into 5L PBS 1x. Afterwards the pump was cleaned with technical isopropanol and ELGA water. The solution was stirred overnight at 4°C for refolding.

Biotinylation of BSA

Investigator: JB

Aim of the experiment: Biotinylation of BSA

Procedure: A 100 µM (=6.8 mg/ml) solution of BSA (Albumin fraction V, pH=7, in the fridge in the central lab) was created (V=10 ml). 220 µl of a 100 mM Biotin stock were added. The mixture was stored overnight Iin the fridge (4°C).

Result: Hopefully biotinylated BSA mixture in the fridge (4°C).

Friday, May 20th

Qualitative analysis of streptavidin expression

Investigator: CG

Aim of the experiment: SDS gel analysis of recombinant strepatividin expression

Procedure: mixing of 80 µl sample with 20 µl SDS buffer and heating at 95°C for 10 min. 1 h staining, 1 night unstaining

Result:

1. Lane: 8 µl Marker (Thermo Fisher #26610)
2. Lane: 12 µl culture aliquot, before induction
3. Lane: 12 µl culture aliquot, after induction
4. Lane: 3 µl culture aliquot of the lysed pelet, Strepatvidin expected at about 16 kDa
5. Lane: 3 µl culture aliquot of the supernatend after lysis, no Strepatvidin expected at about 16 kDa
6. Lane: 1.5 µl culture aliquot of the lysed pelet, Strepatvidin expected at about 16 kDa
7. Lane: 1.5 µl culture aliquot of the supernatend after lysis, no Streptavidin expected at about 16 kDa

Cloning of A3C5 and Avi-Tag into pSB1C3

Investigator: LK

Aim of the experiment: Inoculation of pre-culture with E. coli XL1 (pSb1C3 -RFP) in LB-Chloramphenicol-medium

Procedure: Picking of colonies for E. coli XL1 (pSb1C3 -RFP) Inoculate in 5 ml LB-Chloramphenicol-medium Incubate at 37°C over night at 200 rpm

Transformation of Biobricks in XL1-blue

Investigator: NA, JH

Aim of the experiment: Transformation

Procedure: -10 µl dd H2O in well of interest (standard distribution kit) -1 µl Plasmid (out of well) to cells -Transformation according to the SOP Used bricks: K577893, B0015, R0040, B0032, I14033, K747096

Ammonium sulfate precipitation of streptavidin

Investigator: JB

Aim of the experiment: Reduction of the protein solution volume and precipitation of streptavidin

Procedure: The 5 L protein solution was spun down (20 mins, 5,000 rpm) and the supernatant transferred into a beaker. In order to lower the volume of the solution for ammonium sulfate precipitation, the solution was first filtered via a membrane crossflow pump (membrane: Sartocon 0.45 µm, thick membrane).

Dialysis of biotinylated BSA

Investigator: NA

Aim of the experiment: purification of biotinylated BSA

Procedure: dialysis against Tris/HCl 20 mM, pH 8, 10 mM NaCl over night; cut off : 14 kDa

Week 2 (May 23rd - May 29th)

Monday, May 23th

Cloning of A3C5 and Avi-Tag into pSB1C3

Investigator: CR

Aim of the experiment: Cloning of A3C5 and Avi-Tag into pSB1C3

Procedure:

MiniPrep was performed after manufacturer's protocol (QIAprep MiniPrep, Qiagen)
pSB1C3 was digested with AgeI and NgOMIV (10 µL plasmid + 1.5 µL AgeI + 1.5 µL NgoMIV + 3 µL CutSmart + 14 µL ddH2O; incubation for 1h, 37°C)
FastAP was added and the reaction was incubated for another 2h at 37°C
The digestion was purified by gelelctrophoresis (1%, 75V, 1h)
Plasmid backbone was cut from the gel

Results:

Signal 1: linearized pSB1C3 (successfull digestion)

Signal 2: supercoiled pSB1C3 (digestion not successfull)

Signal 3: RFP-generator

--> next time gel should run longer (just if you need the back bone)

Filtration of Streptavidin and precipitation with Ammonium-sulfate

Investigator: MP, CR

Aim of the experiment: Concentration of Streptavidin

Procedure: The solution was filtered via a membrane crossflow pump (membrane: Sartocon 0.45 µm, thick membrane). The final volum was 0.5L The solution was precipitated by addition of Ammonium-sulfate (2 steps: 1. 40% Ammonium-sulfate; 2. 70% Ammonium-sulfate) After the first addition of ammonium-sulfate the solution was stirred (1h, 4°C) Afterwards the solution was centrifuged (10.000 rpm; 30 min) and the supernatant was used for the second precipitation step The solution was stirred again (over night, 4°C)

Inoculation of pre-culture with BioBricks in pSB1C3 in LB-Cam

Investigator: JH, JL

Aim of the experiment:

Procedure: Add 50 µL chloramphenicol in 50 mL LB-medium Picking colonies from K577893; B0015; B0032 (in pSB1C3) * Inoculate 4 mL medium (CAM) Incubate at 37°C over night

Following cultures didn´t grow and were therefore not inoculated:

R0040; K747096; I14033

Retransformation of Biobricks in XL1-blue

Investigator: JH, JL, EF

Aim of the experiment: Transformation

Procedure: 10 µl dd H2O in well of interest (standard distribution kit) 1 µl Plasmid (out of well) to cells Transformation according to the SOP Used bricks: K577893, B0015, R0040, B0032, I14033, K747096

Tuesday, May 24th

Inoculation of pre-culture with BioBricks in pSB1C3 in LB-Cam

Investigator: CR

Aim of the experiment:

Procedure: Add 50 µL chloramphenicol in 50 mL LB-medium Picking colonies from K577893; B0015; B0032 (in pSB1C3) * Inoculate 4 mL medium (CAM) Incubate at 37°C over night

Cloning of A3C5 and Avi-Tag into pSB1C3

Investigator: CR

Aim of the experiment: Gelextraction of Signal 1 from pSB1C3-digestion

Procedure: Gelextraction was performed after manufacturer's protocol (Gelextractionkit, Qiagen)

Ammonium sulfate precipitation

Investigator: JB

Aim of the experiment: Precipitation the 70% saturated ammonium sulfate solution

Procedure: The ammonium sulfate solution, which actually was a suspension, was transferred into centrifuge tubes and spun down (10,000 rpm, 45 mins). As it turns out, unfortunately too much ammonium sulfate was used for the precipitation (wrong table). The precipitate was brought back into solution (20 mM Tris/HCl, pH 8.0) and loaded onto an SDS gel for analysis, along with other samples (flowthrough of the filtration from the day before).

MiniPrep of BioBricks in pSB1C3 (inoculated on May 23th)

Investigator: JH

Aim of the experiment: Extraction of BioBricks B0032, B0015 and K577893 in pSB1C3 from XL1 blue

Procedure: MiniPrep was performed after manufacturer's protocol (QIAprep MiniPrep, Qiagen) concentrations measured (in ng/µL): (B0032) 360.2; (B0015) 254.9; (K577893) 99.2

Sequencing of P23 (weak RBS), P24 (double terminator) & P24 (Tet repressed GFP)

Investigator: JH

Aim of the experiment: Sequencing of P23, P24 & P25 (x2)

Procedure: Sequencing batches were prepared after manufacturer's protocol (15 µL plasmid DNA (50-100 µM) and 2 µL sequencing primer)

The different plasmids we prepared received the following barcodes:

P23 (VF2) : FR11326647
P24 (VF2) : FR11326646
P25 (VF2) : FR11326645
P25 (VR) : FR11326644

Wednesday, May 25th

Inoculation of pre-culture with tet-repressed GFP (P25) in LB-Cam

Investigator: NA

Procedure: Add 50 µL chloramphenicol to 50 mL LB-medium Picking colonies from plate (BL21) Incubate over night at 37°C => dismissed, because plasmid sequence was inaccurate

MiniPrep of K747096, I14033, R0040, B0015, K577893 and B0032

Investigator: CR

Aim of the experiment: MiniPrep of BioBricks

Procedure: MiniPrep was performed after manufacturer's protocol (QIAprep MiniPrep, Qiagen) Concentrations were measured (in ng/µL):

K747096: 286.2
I14033: 246.1
R0040: 243.5
B0015: 244.1
K577893: 440.9
B0032: 259.7

PCR of P19 (QC EspP) with O3 and O4

Investigator: CR

Aim of the experiment: Amplification of quickchanged EspP

Procedure:

reaction was performed after manufacturer's protocol (PCR Using Q5® High-Fidelity DNA Polymerase, NEB)
274,4 pg Plasmid were used for amplification (1 µL)
PCR program (standard):

Step	Temperature [°C]	Time [s]
initial Denaturation	98	30
35 cycles	98	10
	72	30
	72	60
final Extension	72	5
Hold	4	ꝏ

PCR product was purified accoding to manufacturer's protocol (PCR puification kit, Qiagen)
DNA was eluted 40 µL EB buffer

Digestion of PCR of EspP (P19 with O3 and O4)

Investigator: CR

Aim of the experiment: Digestion of EspP with AgeI and NgoMIV to ligate it in pSB1C3 later on

Procedure:

Batch for preparative digestion:

Volume	Reagent
38.5 µL	PCR product P19 with O3 and O4
1 µL	AgeI
1 µL	NgoMIV
5 µL	CutSmart buffer
4.5 µL	ddH₂O
50 µL	TOTAL

Incubation for 2 h at 37 °C

Sequencing of P26 (CMV promotor), P27 (p cat promotor), P28 (Tet repressible promotor), P30 (Tet repressed GFP)

Investigator: NA

Aim of the experiment: Sequencing of P26, P27, P28 & P30 (x2)

Procedure: Sequencing batches were prepared after manufacturer's protocol (15 μL plasmid DNA (50-100 μM) and 2 μL sequencing primer) The different plasmids we prepared received the following barcodes: P26 (VF2) : FR11326643 P27 (VF2) : FR11326642 P28 (VF2) : FR11326641 P30 (VF2) : FR11326640 P30 (VR): FR11326639

Ion exchange chromatography of eGFP

Investigator: NA, JB,JL

Aim of the experiment: purification of eGFP

Procedure:

use Äkta-Purifier (Q-column for eGFP (quarternary ammonium as stationary phase)). Ask Andy before use!
Pump A: running buffer (20 mM Tris/HCl pH 8); pump B: elution buffer (20 mM Tris/HCl pH 8 and 1,000 mM (1 M) NaCl
basic pumpwash before start
injection in loop
gradient of ion strength on column.

Results: Elution of eGFP at ~200 mM NaCl.

Thursday, May 26th

Inoculation of cultures with XL-1 F11 and F12 clones

Investigator: JB

Aim of the experiment: Inoculation of a 5 ml culture with a clone of the previously transformed F11 (Avi-Tag) F12 (Antibody-binding site).

Cloning of ligation F14 +F13

Investigator: MP, EF, JH

Aim of the experiment: new biobrick EspP in pSB1C3

Procedure: F14 was purified by gelelctrophoresis (1%, 90 V, 40 min) gelextraction was performed after manufacturer's protocol (Gelextractionkit, Qiagen) ligation of F14 (EspP) with F13 (dephos. PSB1C3) transformation according to protocol in competent E.coli XL1 blue

Results:

Transformation of Biobrick B0034 in XL1-blue

Investigator: JH

Aim of the experiment: Transformation

Procedure:

10 µl ddH2O in well of interest (standard distribution kit, plate 4, well 1N)
1 µl Plasmid (out of well) to cells
Transformation according to the SOP (incl. rescue)

Transformation of Biobricks K577895 and K577894 in XL1-blue

Investigator: NA

Aim of the experiment: Transformation

Procedure:

10 µl ddH2O in well of interest (standard distribution kit, plate 1, wells 14B / 12P)
1 µl Plasmid (out of well) to cells
Transformation according to the SOP (incl. rescue)

SDS-PAGE of eGFP-fractions after IEC

Investigator: NA, CG

Procedure: mixing of 80 µl sample with 20 µl SDS buffer and heating at 95°C for 10 min. 1 h staining, 1 night unstaining Concentrations were measured via nanodrop (A280, extinction coefficient: 55000 M−1cm−1)

Result: concentrations in mg/ml 1. Lane: 8 µl Marker 2. Lane: 10 µl of fraction 10; c= 0 3. Lane: 10 µl of fraction 11; c= 0,15 4. Lane: 10 µl of fraction 12; c= 0,77 5. Lane: 10 µl of fraction 13; c= 0,29 6. Lane: 10 µl of fraction 14; c= 0,4 7. Lane: 10 µl of fraction 15; c= 0,144 8. Lane: 10 µl of fraction 16; c= 0,085

$Muc16 SDS-PAGE of eGFP-fractions after IEC.png$

eGFP is clearly detectable at about 27 kDa. The most pure fractions 12 and 13 were pooled for later biotinylation.

Friday, May 27th

Inoculation of pre-cultures with B0034 (strong RBS), K577894 (Tet repressed YFP), KK577895 (Tet repressed RFP), F13+F14

Investigator: JH

Procedure:

Add 50 µL ampicillin(B0034)/chloramphenicol(K5777894, K577895, F13+F14) to 50 mL LB-medium
Picking colonies from plate (XL1 blue; all rescue)
Incubate over night at 37°C

Inoculation of BL21 (pASK75 (SA1)) culture in 2 L TB-Medium and induction of streptavidin production by addition of tetracycline

Investigator: NA

Aim of the experiment: Production of streptavidin

Procedure:

Ampicillin (2 mL) was added to the Medium (1:1000)
The pre-culture (50 mL) was poured into the Medium
Culture was incubated at 37°C and 140 rpm until OD550 reached 0.5
To induce streptavidin expression anhydro-tetrazycline (200 µL) was added to the culture (1:10000)
The culture was incubated at 37°C and 140 rpm for 4 hours

Result: Streptavidin expression by BL21

Re-sequencing of P30 (Tet repressed GFP in pSB1C3)

Investigator: NA

Aim of the experiment: Purification and sequencing of P30

Procedure:

P30 was heated up to 100 °C and centrifugated afterwards to remove proteins from Promotor (if there are some), the supernatant is sequenced
Sequencing batches were prepared after manufacturer's protocol

(15 μL plasmid DNA (50-100 μM) and 2 μL sequencing primer)
The different plasmids we prepared received the following barcodes:
- P30 (VF2) : FR11326638

Expression and harvest of Streptavidin (pASK75 (SA1)) in BL21 in TB-medium

Investigator: JH, NA

Aim of the experiment: Recombinant expression and purification of Streptavidin

Procedure:

After expression, cultures were transferred into centrifuge tubes and spun down in the centrifuge (4°C, 5000 rpm, 20 mins, F 4X1L rotor)
The supernatant was cast away and the pellet was stored at –20 °C

Cloning of A3C5 and Avi-Tag into pSB1C3

Investigator: CG

Aim of the experiment: MiniPrep of cloned pSB1C3-A3C5 and –AviTag Plasmids

Procedure:

MiniPrep of inoculated precultures was performed according to manufacturer’s protocol (QIAprep MiniPrep, Qiagen)
Concentrations were measured (in ng/µL):

Colony 1 of pSB1C3- AviTag P32: 120 Colony 2 of pSB1C3- AviTag P33: 110 Colony 1 of pSB1C3-A3C5 P34: 126 Colony 2 of pSB1C3-A3C5 P35: 188

Cloning of A3C5 and Avi-Tag into pSB1C3

Investigator: NA, JH, CG

Aim of the experiment: Initial vector digestion was performed with NgoMiV and AgeI, producing complementary overhangs. Religated pSB1C3 (due to incomplete vector dephosphorylation) loses the AgeI recognition sequence. Therefore plasmids without insert should run in the supercoiled position at about 1.5 kb, plasmids with inserts should run in the linearised position at 3 kb. Single enzyme digestion was chosen, because the insert is too small to be solved on a gel.

Procedure:

analytic digestion: 3 µl of plasmid DNA P32 to P35 (about 300 ng) were digested with 0.3 µl AgeI-HF in 1 µl CutSmart Buffer and 5.7 µl H2O. The reaction was incubated for 2 h at 37°C.
5 µl digestion mix were loaded on a 1% agarose gel for electrophoresis, 1 kb ladder

Result:

P32 to P35 might carry the insert because they all appear in the linearized position at 3 kb
Therefore plasmid sequencing should confirm the result.

Lane 1: 1 kb ladder Lane 3: P32 Lane 4: P33 Lane 5: P34 Lane 6: P35

Week 3 (May 30th - June 5th)

Monday, May 30th

Cloning of A3C5 and Avi-Tag into pSB1C3

Investigator: CR

Aim of the experiment: Sequencing of P32 and P35

Procedure:

Sequencing batches were prepared according to manufacturers protocol (Mix2Seq Kit, Eurofins Genomics): 15 μL plasmid DNA (50-100 μM) and 2 μL sequencing primer (10 µM)

The plasmids received the following barcodes:
- P32 (VF2) : FR11326637
- P35 (VF2) : FR11326636

Religation of F13 (digest of pSB1C3 with AgeI and NgoMIV) and transformation in XL1 blue

Investigator: CR

Aim of the experiment: Re-ligate digested and dephosphorylated pSB1C3 and transformation in XL1blue

Procedure:

Plasmid was ligated with the T4 DNA Ligase following the manufacturer’s protocol (NEB)
52 ng Vector DNA were used
The Ligation mix was incubated for 30 min at RT
7 μL Ligation mixed were used for the transformation of 50 μL XL1 blue.
Transformation was performed following the SOP

Result:

5 clones on plate

Inoculation of pre-cultures with B0034 (strong RBS), K577894 (TET repressed YFP), KK577895 (Tet repressed RFP), F13+F14

Investigator: CR

Procedure:

Add 50 µL ampicillin(B0034)/chloramphenicol(K5777894, K577895, F13+F14) to 50 mL LB-medium
Picking colonies from plate (XL1 blue; all rescue)
Incubate over night at 37°C

Tuesday, May 31th

Dialysis of eGFP

Investigator: NA

Aim of the experiment: Changing the buffer of eGFP for biotinylation (from TRIS to PBS)

Procedure:

eGFP was poured in a dialysis hose (cut-off 14 kDa)
The hose was then placed in ice cold PBS pH 7.4
The dialysis took place at 4°C overnight

Expression and harvest of Streptavidin (pASK75 (SA1)) in BL21 in TB-medium

Investigator: JB, NA

Aim of the experiment: Recombinant expression and purification of Streptavidin

Procedure:

The pellet was transferred into a beaker of sufficient size and resuspended in fridge-cooled Tris Buffer B (50 mM Tris/HCl (pH = 8.0), 1 mM EDTA)
The solution was homogenized in the PANDA (see SOP)
The resulting lysate was transferred into centrifuge tubes and spun down (4°C, 18,000 rpm, 30 mins, SS34-rotor). The supernatant was cast away and the pellet was resuspended in 6M Gua-HCl (pH = 1.5) at 4°C overnight.

Transformation of P30 (Tet repressed GFP)

Investigator: NA

Aim of the experiment: expression of tet-repressed GFP in E. Coli BL21

Procedure: transformation in competent E. Coli BL21 according to protocol

Result: plates (LB Cam) in incubator for further processing (37 °C)

Cloning of A3C5 and Avi-Tag into pSB1C3

Investigator: CR, JH

Aim of the experiment: Preculture of pSB1C3 (F13+F14) was red See if RFP-generator is still inside the pSB1C3 See if ligation of EspP was successful

Procedure:

MiniPrep of P39 was performed after manufacturer's protocol (QIAprep MiniPrep, Qiagen)
pSB1C3 was digested with AgeI and NgOMIV (1.5 µL P39 + 1.5 µL AgeI + 1.5 µL NgoMIV + 3 µL CutSmart + 22.5 µL ddH2O; incubation for 2h, 37°C)
FastAP was added and the reaction was incubated for another 10min at 37°C
FastAP was inactivated by heating the mix to 75°C for 10min.
The digestion was purified by gelelctrophoresis (1%, 75V, 1h)

Results:

Unknown signals. Repeat transformation, digestion, dephosphorylation and ligation of pSB1C3

Re-transformation of P4 (pSB1C3 (RFP-generator)) in XL1 blue

Investigator: JH, CR

Aim of the experiment: Transformation

Procedure:

2 μL P4 were used for transformation of XL1 blue
Transformation was performed according to SOP (incl. rescue plate)

Competent E. coli XL1 cells

Investigator: JB

Aim of the experiment: Generation of competent E.coli XL1 cells

Procedure:

5 ml LB w.o. antibiotics (sterile)
Inoculation of one colony of E.coli XL1 cells
Incubate overnight at 37°C

Wednesday, June 1th

eGFP Biotinylation

Investigator: CG

Aim of the experiment: Biotinylation of dialysed eGFP past IEC

Procedure:

The average concentration of the pooled factions 12 and 13 should be about 0.5 mg/ml (=19 µM)
10 ml of a 100 mM Biotin stock-solution was prepared (340 mg)
3.5 ml of eGFP were biotinylated with 12 µl 100 µM Biotin-solution (20x molar excess)
Incubation at 4 °C overnight

pSB1C3 vector backbone preperation

Investigator: CG

Aim of the experiment: Inoculation of two colonies pSB1C3-RFP Generator

Procedure:

2x 5 ml LB+Cam medium (1:1000)
Picking colonies from plate (XL1 blue, rescue)
Incubate overnight at 37°C

Generation of GFP expressing E. coli cells

Investigator: CG

Aim of the experiment: Inoculation of BL21 transformed cell with P30

Procedure:

50 ml LB+Cam medium (1:1000)
Picking colonies from plate (BL21, rescue)
Incubate over night at 37°C

Competent E. coli XL1 cells

Investigator: JB

Aim of the experiment: Generation of competent E. coli XL1 cells

Procedure:

Inoculated 500 µl preculture in 50 ml LB media w.o. antibiotics
Incubated and shaken at 37°C until the OD550 reached 0.44
Transferred into a falcon tube and incubated on ice for 10 mins
Spun down at 3000 g for 10 mins at 4°C, supernatant cast away
Pellet resuspended in 40 ml fridge-cooled MgCl2 (100 mM), once again spun down at 4°C for 10 mins at 3000 g
Supernatant cast away, pellet resuspended in 20 ml cold CaCl2 (50 mM)
Incubation on ice for 30 mins
Centrifugation repeated, supernatant cast away
Pellet resuspended in 2 ml of CaCl2 (50 mM) and glycerol (15%)-solution, aliquoted (50 µl each), frozen in liquid nitrogen and stored at -80°C for further use

Cloning of Pcat-RBS-construct in pSB1A2

Investigator: CG, JH, CR

Aim of the experiment: Pcat (I14033) was cut out of P27 and ligated into P38 for generating the Pcat-RBS (B0034) construct.

Procedure:

P27 was digested with EcoRI and SpeI (4 µL P27 + 1.5 µL EcoRI + 1.5 µL SpeI + 3 µL CutSmart + 20 µL ddH2O; incubation for 2h, 37°C)
P38 was digested with EcoRI and XbaI (10 µL P27 + 1.5 µL EcoRI + 1.5 µL XbaI + 3 µL CutSmart + 14 µL ddH2O; incubation for 2h, 37°C)
Preperative gel electrophoresis was performed
For P27 the signal at about 50 bp was cut out and gel extracted according to manufacturer's protocol (Gelextractionkit, Qiagen): 5.9 ng/µl
For P30 the signal at about 2.1 kb was cut out and gel extracted according to manufacturer's protocol (Gelextractionkit, Qiagen): 8.9 ng/µl
Ligation according to SOP

Purification of streptavidin

Investigator: JB

Aim of the experiment: Refolding denaturized streptavidin

Procedure:

the GdmCl-solved streptavidin was spun down using an SS-34 rotor (~60 min, 18,000 rpm, 4°C)
The supernatant containing the solved and denaturized protein was transferred into a falcon tube, the pellet cast away
The protein solution was slowly dripped into 4 l of cooled 1x PBS (in the 4°C room) using a hydraulic pump and stirred overnight

Tuesday, June 2th

Preparation of pSB1C3 for further use

Investigator: CR

Aim of the experiment: Digestion of pSB1C3 to remove RFP-generator

Procedure:

MiniPrep was performed after manufacturer's protocol (QIAprep MiniPrep, Qiagen)
P40 was digested with AgeI and NgOMIV (2.5 µL P40 + 1.5 µL AgeI + 1.5 µL NgoMIV + 3 µL CutSmart + 21.5 µL ddH2O)
Incubation over night at 37°C

Generation of GFP expressing E. coli cells

Investigator: CG, JH

Aim of the experiment: Various inductor concentrations

Procedure:

12x 5 ml LB+Cam media were inoculated with 50 µl preculture
when cultures reached OD550 of 0.5, they were induced with tetrazycline-anhydride of various concentrations (0 ng/µl, 20 ng/µl, 40 ng/µl etc., 200 ng/µl)
t=0, =30, =90, =150, =210, =270 a 100 µl aliquot of each culture was stored at 4 °C in the refrigerator

Dialysis of biotinylated eGFP

Investigator: JH, JB

Aim of the experiment: Purification of biotinylated eGFP

Procedure:

eGFP was poured in a dialysis hose (cut-off 14 kDa)
The hose was then placed in 2 L ice cold Tris/HCl 20 mM pH 8.0
The dialysis took place at 4°C over night

Ligation of F17.1 (p(cat)) and F18 (stron RBS) and transformation in XL1 blue

Investigator: JH

Aim of the experiment: Ligation and transformation in XL1blue

Procedure:

Plasmid was ligated with the T4 DNA Ligase following the manufacturer’s protocol (NEB)
9 µL F18 (B0034 in pSB1A2; RBS) and 1 µL of F17.1 (I14033; P(cat)) were used [AmpR]
The Ligation mix was incubated for at least 2h at RT
7 μL Ligation mixed were used for the transformation of 50 μL XL1 blue
Transformation was performed following the SOP [AmpR], incl. rescue plate

Friday, June 3th

Cloning of F8 (A3C5), F9 (Avi-Tag) and F14 (EspP) into F20

Investigator: CR

Aim of the experiment: Cloning of A3C5, Avi-Tag and into pSB1C3

Procedure:

FastAP was added and the digestion of F20 and was incubated for another 15 min at 37°C
The digestion was purified by gelelctrophoresis (1%, 75V, 1h)
Plasmid backbone (signal 1) was cut from the gel
Gelextraction was performed after manufacturer's protocol (Gelextractionkit, Qiagen)

Results:

Signal 1: F20

[F20]= 13,8 ng/μL

Generation of GFP expressing E. coli cells

Investigator: CG, NA

Aim of the experiment: SDS PAGE for verification of successful GFP expression

Procedure:

SDS electophoresis according to SOP
Lane 1: #12, 90 min
Lane 2: #12, 150 min
Lane 3: #12, 210 min
Lane 4: #12, 270 min
Lane 5: 8 µl

Results:

Inoculation of colonies from F19 (pcat-strong RBS)

Investigator: CG

Aim of the experiment: three colonies were picked from yesterdays transformation

Procedure:

3x 5 ml LB+Amp media
Each culture was inoculated with one colony
Incubation at 37°C overnight

Cloning of F8 (A3C5), F9 (Avi-Tag) and F14 (EspP) into F20 (pSB1C3)

Investigator: CG

Aim of the experiment: Ligation of F21, F22 and F23 into F20 and transformation

Procedure:

Ligation was performed according to the SOP with: 0.7 µl F8 (1:10) / 9.3 µl F20, 0.7 µl F9 (1:10) / 9.3 µl F20, 9.1 µl F14 / 0.9 µl F20
Transformation was performed according to the SOP on LB Cam-Agar

Precipitation of Streptavidin

Investigator: NA, JB, LK

Aim of the Experiment: Purification of Streptavidin

Procedure:

Slowly add (NH4+)2SO42- until the concentration reaches 40% (23,1 g/100mL) while stirring
Let it stir over night to ensure complete precipitation
Centrifuge at 8500 rpm at 4°C for 15min (rotor: SLA1500), dismiss the pellet and use the supernatant for further processing
Slowly add (NH4+)2SO42- until the concentration reaches 70% (19,1 g/100mL) while stirring
Let it stir over night (slowly to avoid foaming)
Centrifuge at 8500 rpm at 4°C for 15min (rotor: SLA1500), dismiss the supernatant and use the pellet for further processing
Resuspend the protein pellet in a minimum volume of TRIS/HCl; pH 8; 20mM (NO SALT) (6 mL per pellet), the pellets where then united and titrated with Buffer until the solution became clear. Total amount of buffer: 40mL
Transfer to 50 mL Falcon Tubes and centrifuge at full speed for 15 min. Filter the supernatant through 45nm sterile filter and keep the pellet (rescue).

Saturday, June 4th

Inoculation of colonies from F21 (pSB1C3 (A3C5)), F22 (pSB1C3 (Avi-Tag)), F23 (pSB1C3 (EspP))

Investigator: NA

Aim of the experiment: three colonies were picked from each transformation

Procedure:

3x 5 ml LB+Cam media for each fragment
Each culture was inoculated with one colony
Incubation at 37°C overnight

MiniPrep of F19 (pSB1A2 (pcat-strong RBS))

Investigator: NA

Aim of the experiment: Extraction of Ligation: F17+F18 (starke RBS+P(cat))

Procedure: MiniPrep was performed after manufacturer's protocol (QIAprep MiniPrep, Qiagen) Concentrations: K1= 66,2 ng/µl; K2= 60,2 ng/µl; K3= 104,4 ng/µl

Week 4 (June 6th - June 12th)

Monday, June 6th

Cloning of TetR from p28 into p31 (pSB1C3(weak RBS))

Investigator: LK, JH, NA

Aim of the experiment: Cloning TetR in front of weak RBS in pSB1C3

Procedure:

Digestion of p28 with EcoR1 and Spe1 (20µl DNA, 2,5 µl each enzyme, 5µl CutSmart buffer, 20µl ddH2O) and p31 (4µl DNA, 1µl EcoRI / XbaI, 2µl, 12µl DNA) -> Incubation at 37°C for 2h.
Electrophoresis: 1% Agar, 15 min , 70 V (oben p31 und p41, unten p28)

Gelextraction concentrations: p28 (F25) = 2,3 ng/µl

p31 (F24) = 7,8 ng/µl

Ligation with 6,3 µl vector (F24) and 1,7 µl Insert (F25) + 1µl Buffer + 1µl Ligase over night, 16°C

SDS-PAGE of Streptavidin

Investigator: NA, JH, LK

Procedure: mixing of 80 µl sample with 20 µl SDS buffer and heating at 95°C for 10 min. 1 h staining, 1 night unstaining. Concentration of streptavidin was measured via UV/VIS spectroscopy.

c = 23,5 mg/ml

Result:

1. Lane: 8 µl Marker
2. Lane: 5 µl of Streptavidin_1:10
3. Lane: 5 µl of Streptavidin_1:50
4. Lane: 5 µl of Pellet_1:500
5. Lane: 5 µl of after 40% precipitation_1:10
6. Lane: 5 µl of supernatant after 70% precipitation and centrifugation

Successful Streptavidin production verified.

Sequencing of P41 (pSB1C3 (strongRBS-p(cat)))

Investigator: NA

Aim of the experiment: Sequencing of P41

Procedure: Sequencing batches were prepared after manufacturer's protocol (15 µL plasmid DNA (100 ng/ µl) and 2 µL sequencing primer (VF2))

The plasmids prepared received the following barcode:

P41 : FR11326633

Tuesday, June 7th

Transformation of P30 (Tet repressed GFP), P36 (Tet repressed RFP), P37 (Tet repressed YFP)

Investigator: NA

Aim of the experiment: Transformation of RFP, GFP and YFP in BL21

Procedure: transformation in competent E. Coli BL21 according to protocol + rescue

Result: plates (LB Cam) in incubator for further processing (37 °C)

MiniPrep of P42 to P50, analytic digestion, sequencing

Investigator: CG

Aim of the experiment: Verification of successful cloning

Procedure: MiniPrep was performed according to manufacturer's protocol (QIAprep MiniPrep, Qiagen)

Concentrations (ng/µl each) for P42: 260, P43: 247, P44: 181, P45: 118, P46: 261, P47: 135, P48: 148, P49: 240, P50: 299
Analytic digestion: 0.3 µl AgeI, 2 µl CutSmart, 6.7 µl H2O for P42, P43, P44, P45, P46, P49, P50 and 0.3 µl EcoRI, 0.3 µl PstI, 2 µl CutSmart, 6.4 µl H2O for 2 h at 37°C
1% agarose gel electrophoresis
Sequencing: P42= FR11326632 (VF2), P45 =FR11326631 (VF2)

Results:

Lane 1: 5 µl 1 kb Ladder
Lane 2-10: Digestion of P42 to P50. P47 and P48 are carrying the insert. All other plasmids are religated and lost their AgeI site, hence they run in the ccc position.

Dialysis of not biotinylated eGFP

Investigator: NA

Aim of the experiment: Purification of eGFP for mass determination

Procedure:

eGFP was poured in a dialysis tubes
The tubes were then placed in ice cold ammonium acetate
The dialysis took place at 4°C over night

Polymerisation attempts

Investigator: JH, CR, CG, JB

Aim of the experiment: Identification of optimal polymerisation conditions for biotinylated eGFP and BSA in a Streptavidin reservoir

Procedure:

variate of compositions for both solutions was examined to modify density properties during “printing”
all compositions can be found in excel sheet

Results:

no or little successful polymerization at Streptavidin concentrations of 4 mg/mL and below; immense density incompatibilities
sucessfull polymerization at Streptavidin concentrations of 10 mg/mL and BSA solution with approx. 15% glycerol
no success with biotinylated eGFP (too few Biotin molecules?!)

Wednesday, June 8th

Sequencing of P36 (Tet repressed RFP) and P37 (Tet repressed YFP)

Investigator: NA

Aim of the experiment: Sequencing of P36 and P37 in both directions

Procedure: Sequencing batches were prepared after manufacturer's protocol (15 µL plasmid DNA (50-100 µM) and 2 µL sequencing primer)

The different plasmids we prepared received the following barcodes:

P36 (VF2): FR11326630
P36 (VR): FR11326629
P37 (VF2): FR11326628
P37 (VR): FR11326627

Dialysis of Streptavidin

Investigator: NA, JH

Aim of the experiment: Purification of Streptavidin (possible ammonium sulfate contamination after precipitation)

Procedure:

Streptavidin was poured in a dialysis hose (cut-off 14 kDa)
The hose was then placed in 3 L ice cold Tris/HCl 20 mM pH 8.0 (no salt)
The dialysis took place at 4°C over night

Polymerisation attempts

Investigator: JH, JB

Aim of the experiment: Identification of optimal polymerisation conditions for biotinylated BSA in a Streptavidin reservoir

Procedure:

variate of compositions for both solutions was examined to modify density properties during “printing” (Streptavidin at 10 mg/mL or higher)
all compositions can be found in excel sheet

Thursday, June 9th

Generation of GFP, YFP, RFP expressing E. coli cells

Investigator: CG

Aim of the experiment: Various inductor concentrations, various fluorescent proteins were expressed in E coli cells

Procedure:

3x 5 ml LB+Cam media were inoculated with 50 µl preculture of GFP (P30), RFP (P36), YFP (P37)
when cultures reached OD550 of 0.5, they were induced with anhydro-tetrazycline of various concentrations (0 ng/µl, 100 ng/ml, 200 ng/ml)
50 ng/ml = 12,5 µl of 1:100 2 mg/ml stock solution, 200 ng/ml = 50 µl of 1:100 2 mg/ml stock solution
t=0, =4 h and stored on ice

Resuts: no fluorescent could be detected. Therefore an overnight induction at 37°C with 1 µM/ml inductor concentration was performed with the RFP plasmid.

Biotinylation of GFP expressing E. coli cells

Investigator: CG

Aim of the experiment: Biotinylation of P30 carrying E. coli cells

Procedure:

850 µl P30 preculture from Thursday 2nd were centrifuged and the supernatend was discarded
Pellet was resuspended in 800 µl PBS-buffer
100 µl 100 mM Biotin-NHS was added
incubation for 4 h at room temperature
Experimenting with some glycerol and streptavidin concentrations. A more structured approach will be done the next day.

Results: A shape thin “sausage” could be detected. Therefore a bigger E. coli culture was biotinylated at 4°C overnight for experimenting with the next day.

Cloning of TetR promotor and weak RBS in pSB1C3

Investigator: CR, JB

Aim of the experiment: MiniPrep and NanoDrop of F26 K1, K2 and K3 Sequencing of P51

Procedure: MiniPrep was performed according to manufacturer's protocol (QIAprep MiniPrep, Qiagen) Concentrations were as following:

P51: 163,3
P52: 151,7
P53: 140,5

P51 was sequenced:

1. with VF2: FR11326626
2. with VR: FR11326625

Biotinylation of eGFP

Investigator: VL, JB

Aim of the experiment: Biotinylation of eGFP with 200x biotin-NHS molar excess over eGFP (15x excess over surficial K residues). NB: previous trial unsuccessful. Excess of biotin was likely insufficient to ensure efficient biotinylation, esp. since biotin-NHS slowly hydrolyzes in the aqueous environment.

Procedure: 1 ml of eGFP was biotinylated with an 200x excess of biotin in DMF (100 uM; 38 uL), 5.5 h at rt. The solution was dialysed versus 20 mM Tris/HCl pH 8 overnight at 4 °C.

PCR of gene syntheses

Investigator: LK

Aim of the experiment: Amplification od iGEM_1_SA-m1 (F27), iGEM_1_mRuby_EGFR (F28) and iGEM_2_IRES-BirA (F29)

Procedure:

Add 100µl of ddH2O to the gene sythesis samples and incubate for 20 min at 50°C
Dilute samples to a final concentration of max. 1ng/µl (1:10) with water.
Approach:

1µl DNA (diluted)

5µl buffer

0,5µl dNTPs

1,25µl forward Primer VF2

1,25µl reverse Primer VR

0,25µl Q5 Polymerase

Fill up with water up to 25µl

Make sure to pipette everything on ice and add the polymerase at the end
Setup: (calculated with NEB calc. http://tmcalculator.neb.com/#!/)

98°C_1min initiation step

98°C_10sec

66°C_30sec > step 2-4: 35 repeats

72°C_30sec

72°C_2min final step

4°_hold

The samples were then prepared with the PCR Product Purification Kit

Polymerisation experiments for biotinylated eGFP and BSA with Streptavidin

Investigator: JH, CR, JB

Aim of the experiment: Determination of ideal concentrations for both protein interaction partners as well as buffer viscosity (glycerol content etc.) for polymerisation in a test tube

Procedure:

Different concentrations of proteins and glycerol were tested to support stable polymerisation without protein aggregates rising to the surface or sinking to quickly
The experiments done are not going to be further documented as the streptavidin used for the experiments was previously determined in a wrong fashion and was actually considerably lower than expected (4x lower). Streptavidin was, due to that circumstance, concentrated to be able to support experiments with at least 5 mg/ml concentrations
First experiments with concentrated streptavidin seemed promising, though a complete series of experiments with varying parameters should be conducted in the future

Sequencing of P29 (pSB1C3 (double terminator), P36 (pSB1C3 (Tet repressed RFP)) and P37 (pSB1C3 (Tet repressed RFP))

Investigator: JB

Aim of the experiment: Sequencing of P29, P36 and P37

Procedure: According to the manufacturer's protocol.

P29: FR11326624 (VF2)
P36: FR11326623 (VF2)
P37: FR11326621 (VR), FR11326622 (VF2)

Inoculation of (pre)cultures for a pSB1C3 midiprep

Investigator: JB, VM

Aim of the experiment: Massively amplifying the pSB1C3 vector (which will be needed for building up new biobricks) by midiprepping the P40 plasmid (RFP-generator in pSB1C3). Similar to minipreps, but on a greater scale. Procedure: 3 ml precultures were inoculated with a clone from the plate previously used for minipreps. After the precultures had grown for 4 hours (due to shortage of time), 2 x 50 ml cultures were inoculated and shaken overnight at 37°C. The next day, cultures were put into the fridge for storage until Monday.

Week 5 (June 13th - June 19th)

Monday, June 13th

Digestion of gene synthesis iGEM1 and iGEM2

Investigator: LK, JH

Aim of the experiment: Digest F28 (iGEM1) and F29 (iGEM2) in order to ligate them into P40, which was equally digested (to get rid of the rfp-generator and have pSB1C3 as backbone)

Procedure:

30µl of F28 were digested for 3h with SpeI and NgoMIV, and 30 µl of F29 were digested with XbaI and PstI
2 x 20 µl where digested with the equivalent enzymes for 3h
After electrophoresis the bands were cut out and purified

Results: Results show that PCR of F28, F29 might not have worked. P40 was extracted from gel (F30 and F31). PCR of gene synthesis was repeated (50µl!)

Midiprep of P40

Investigator: LK

Aim of the experiment: Purification of P40 from

Procedure:

See protocol of Midiprep kit
1xuse-centrifugation-columns broke in centrifuge during last step, DNA rescue was tried by resuspending rest of the solution in the tube in EB buffer and redo the last steps (isoprop and ethanol precipitation)
Airdry "pellet"(no pellet visible) for 15 min under fume hood and resuspend in 100µl EB Buffer
Measure concentration with nanodrop

Preparation of Collagen + Biotinylation

Investigator: VL, JL

Aim of the experiment: prepare collagen solution + biotinylate small sample

Procedure:

Dissolve 5 g collagen in 50 mL Tris/HCl pH 8 20 mM w/o salt --> 770 uM solution (100 mg/mL)
Sterile filter
Biotinylation: 980 uL Tris buffer + 20 uL collagen solution + 30 uL biotin-NHS (100 mM in DMF, 200x molar excess over collagen monomers)
Reaction time:
Dialyze 4 °C Tris/HCl pH 8 20 mM w/o salt o/n

Transformation of P9 (pASK75)

Investigator: JL, VL

Aim of the experiment: transform streptavidin expression vector P9 (clone 4) into E. coli BL21

Procedure:

Standard (see booklet): 45 s at 42 °C; incubate 1h, 37°C; plate: medium w. chloramphenicol (+ rescue plate) Incubate o/n 37°C.
Wrong antibiotic plate, repeated the next day of the experiment: Massively amplifying the pSB1C3 vector (which will be needed for building up new biobricks) by midiprepping the P40 plasmid (RFP-generator in pSB1C3). Similar to minipreps, but on a greater scale.

Tuesday, June 14th

Mass spectrometry of biotinylated eGFP

Investigator: CR

Aim of the experiment: identify biotinylation degree of eGFP

Procedure:

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Results: about 4-5 biotins per protein. To verify the biotinylation degree the unbiotinylated eGFP will be measured.

Cloning of F32 (PCR iGEM_1 mRuby-EGFR) and F33 (PCR iGEM_2 IRES-BirA) in pSB1C3

Investigator: CR

Aim of the experiment: Purification of PCR products

Procedure:

Volume of PCR reaction: 50 µL
PCR products were purified by manufacturers protocol (QIAquick PCR purification kit, Qiagen)
Concentration measured by Nanodrop:
F32: 87,5 ng/µL
F33: 68,3 ng/µL
Test if PCR worked:
Samples were applied on a 2% agarose gel and was run at 80 V for 40 min.

Results:

PCR of F28 worked --> F32
PCR of F29 did not work --> wrong primers were used for amplification --> F33 not right (Re-Do PCR with appropriate primers

Cloning of F32 (PCR iGEM_1 mRuby-EGFR) and F33 (PCR iGEM_2 IRES-BirA) in pSB1C3

Investigator: CG

Aim of the experiment: Digestion of F32 (SpeI, NgoMIV) and F33 (XbaI, PstI)

Procedure:

Digestion F32: 27 µl of F32 (2.4 µg), 5 µl CutSmart Buffer, 1.5 µl SpeI, 2 µl NgoMIV, 14.5 µl H2O
Digestion F33: 27 µl of F32 (1.8 µg), 5 µl CutSmart Buffer, 1.5 µl XbaI, 1.5 µl PstI, 15 µl H2O
Incubation for 3 h at 37°C
Preperative gel:

Gelextraction of F32 upper band and F32 lower band was executed by manufacturers protocol (Qiagen)
F32 upper band (mRuby) was named F34 (=10 g/yl)
F32 lower band (eGFR) was named F35 (=6 ng/yl)

Cloning of F32 (PCR iGEM_1 mRuby-EGFR) and F33 (PCR iGEM_2 IRES-BirA) in pSB1C3

Investigator: CR

Aim of the experiment: Ligation of F34 (mRuby) and F35 (eGFR) in F30 (pSB1C3); Tranformation in XL1blue

Procedure:

Ligation mixtures were prepared as following:
F34: 8.0 μL F34, 2 μL F30, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase)
F35: 7.6 μL F35, 2.4 μL F30, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase)
Ligation was incubated for 30 min at RT

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Re-Sequencing of P37 (Tet repressed YFP)

Investigator: CG

Aim of the experiment:

Purification and sequencing of P30

Procedure:

P30 was heated up to 100 °C and centrifugated afterwards to remove proteins from Promotor (if there are some), the supernatant is sequenced
Sequencing batches were prepared after manufacturer's protocol
(15 μL plasmid DNA (50-100 μM) and 2 μL sequencing primer)
The plasmid we prepared received the following barcode: P37 (VF2) : FR11326620

Streptavidin expression

Investigator: CR

Aim of the experiment: Transformation of P9 (pASK74 (SA1)) in BL21

Procedure:

Transformation was executed following SOP
Transformed cells were plated on LB medium (Amp) (50 µL and rescue (50 µL)

Dialysis of Streptavidin and biotinylated BSA

Investigator: CR

Aim of the experiment: Streptavidin and bitinylated BSA are both in Tris/HCl without salt. SInce we will perform later experiments in salty solutions the dialysis was performed against 137 mM NaCl (Saltconcetration of PBS)

Procedure:

3 L Tris/HCl NaCl solution was prepared
Dialysis was prepared according to SOP
Cut off Dialysis hose: 14 kDa

Inoculation of (pre)cultures of P40 for a pSB1C3 midiprep [repeat]

Investigator: JH

Aim of the experiment: Massively amplifying the pSB1C3 vector by midiprepping the P40 plasmid (RFP-generator in pSB1C3)

Procedure: four 4 ml precultures were inoculated with a clone from the plate previously used for minipreps. After the precultures had grown for 6 hours, 50 ml cultures were inoculated and shaken overnight at 37°C.

Subcloning of P41 (strong RBS-p(cat)) Insert into pSB1C3

Investigator: JH

Aim of the experiment: Moving P41 (pSB1A2; Pcat+weakRBS) to pSB1C3 for biobrick submission

Procedure:

Digestion of P41 with XbaI and PstI (10 µl DNA, 1,5 µl each enzyme, 3 µl CutSmart buffer x10, 14 µl ddH2O) -> Incubation at 37°C for 2h.
Electrophoresis: 2% Agar, 40 min , 90 V (1kb ladder, empty, P41, 100b ladder)
GelExtraction

Resuts: no visible signal of insert at approx. 100b. Area was cut blind for GelEx. No DNA in the sample according to NanoDrop measurement. Repeated the next day.

Inoculation of colonies from NanoLuc

Investigator: JH

Procedure:

2x 4 ml LB+Cam media
Each culture was inoculated with one colony
Incubation at 37°C overnight

Wednesday, June 15th

Subcloning of P41 (strong RBS-p(cat)) Insert into pSB1C3

Investigator: CG

Aim of the experiment: Moving P41 (pSB1A2; Pcat+weakRBS) to pSB1C3 for biobrick submission. No gel extraction was performed because the fragement is too small to visualize on the gel.

Procedure:

Digestion of P41 with XbaI and PstI (10 µl DNA, 1,5 µl each enzyme, 3 µl CutSmart buffer x10, 1 µl FastAP, 13 µl ddH2O) -> Incubation at 37°C for 2 h, heat inactivation at 80°C for 20 min.

fragement is to small to visualize on agel.

Subcloning into F31: 3.8 μL F38, 6.2 μL F31, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase according to the SOP
Transformation into E. coli XL1 according to the SOP

Miniprep of pSB1C3(Nanoluc)

Investigator: LK

Aim of the experiment: Preperation of a BioBrick with NanoLuciferase in pSB1C3

Procedure:

The Miniprep was done according to the protocol.
The two tubes where pooled.
The new Plasmid is found under P54 and was sent to sequencing.

Polymerisation

Investigator: EU

Aim of the experiment: Determine optimal polymerisation conditions for BSA and Collagen

Procedure: The experiment was performed in a 96 Well plate:

Results: maximum concentration of Streptavidin and biotinylated Protein works best. Collagen does not work. Glycerolconcentrations do not inhibit interaction. Reaction might be to slow at given concentrations to be effective in printing process.

MidiPrep of pSB1C3 with RFP generator (P4)

Investigator: NA

Aim of the experiment: purification of pSB1C3 with RFP generator for further processing (P56)

Procedure:

MidiPrep was performed according to manufacturer's protocol (QIAprep MidiPrep, Qiagen)

Results: Concentration very low (12ng/μL), but high volume (500 μL)

Thursday, June 16th

MiniPrep of F36 (Ligation mRuby in pSB1C3) K1 & K2, F37 (Ligation EGFR in pSB1C3), I13453 (pBad promotor) K1 & K2, K577881 (pC+AraC+pBad+GFPc) K1 & K2

Investigator: CR

Aim of the experiment: isolate Plasmids

Procedure:

MiniPrep was performed according to manufacturer's protocol (QIAprep MiniPrep, Qiagen)
Plasmids were named as following: [concentration]

F36 K1: P57 [212,9 ng/μL]

F36 K2: P58 [181,3 ng/μL]

F37: P59 [195,5 ng/μL]

K577881 K1: P60 [557,2 ng/μL]

K577881 K2: P61 [791,9 ng/μL]

I13453 K1: P62 [130 ng/μL]

I13453 K2: P63 [460 ng/μL]

Sequencing of P29 (double terminator), P36 (Tet repressed RFP) and P37 (Tet repressed YFP)

Investigator: JB

Aim of the experiment: Sequencing of P56, P57, P59, P61 and P62

Procedure: According to the manufacturer's protocol.

P56: FR11326618 (VF2)
P57: FR11326617 (VF2)
P59: FR11326616 (VF2)
P61: FR11326613 (VR), FR11326615 (VF2)
P63: FR11326614 (VF2)

MidiPrep P4 (pSB1C3)

Investigator: VL

Aim of the experiment: isolate Plasmids

Procedure:

MidiPrep was performed according to manufacturer's protocol (QIAprep MidiPrep, Qiagen). Centrifugation steps at 20,000 g performed at 12,500 rpm in special centrifugation tubes. Since only one column was left, both prepped cell pellets were applied to one column. Flow-through and wash was collected.
Conc:

Amplification of BioBricks (overnight cultures for minipreps)

Investigator: JB

Aim of the experiment: Inoculation of 5 ml overnight cultures for minipreps. The following biobricks were used:

BBa_K157012
BBa_K243004
BBa_K243006
BBa_K157001
BBa_K243005
BBa_I712009
BBa_K404108
BBa_K782061
BBa_K1371012
BBa_K782060

Procedure:

Three hours of incubation of the tubes containing the bacterial agar at 37°C (Note: 12 hours are actually recommende)
Inoculation of two times 5 ml preculture containing the appropriate antibiotic per clone. For KanRAmpR (reistance against both ampicillin and kanamycin) it was only selected for ampicillin.
Incubation shaking overnight at 37°C

PCR Amplification of genesynthesis 2 (F29; IRES-BirA)

Investigator: LK

Aim of the experiment: Amplification of Genesynthesis_2 (IHRES_BirA_StrepTag)

Procedure: A 50µl approach was made:

33,5 µl Water
2µl DNA (F29, diluted 1:10)
2,5µl of each Primer (O11 and O12 c:10µM)
0,5µl dNTPmix
5µl Reaction buffer
0,5µl Q5-Polymerase
The Annealing Temp. was set an 58°C
Next step is to run an analytic gel (band should be visible at 1,5 kB)

Friday, June 17th

Cloning of genesynthesis 2 (IRES-BirA) into pSB1C3

Investigator: CG, NA, JH

Aim of the experiment: Purification oft he PCR reaction, gel verification, restriction digestion (F29), ligation with F31 and transformation

Procedure:

Yesterdays PCR was purified according to Qiagen PCR purification kit
An anlaytic gel electrophoresis was performed on a 1% gel with 4 µl purified PCR product
Restriction digest: 26 µl purified PCR product, 1.5 µl XbaI, 1.5 µl PstI, 5 µl NEB SmartCut, 16 µl H2O. Incubation for 2 h at 37°C.
Gel extraction
Ligation: F31
Transformation

Results: Gel electrophoresis after PCR purification exhibit a thin signal at 1.5 kb. Next time 1:30 min for elongation time might increase the signal.

Miniprep new iGEM BioBricks

Investigator: VL

Aim of the experiment: Purify plasmid DNA from transformed cells

Procedure:

Miniprep according to manual (pellet centrifuged 5000 rpm, 10 min, 4 °C)
Elution with 50 uL EB Buffer
Concentrations (all ng/uL):

K782061 (a) 172.9, (b) 53.0

K243006 (a) 241.1, (b) 58.6

K1371012 (a) 138.0, (b) 43.0

K157001 (a) 184.3, (b) 186.4

K782060 (a) 339.0, (b) 254.0

K243005 (a) 62.3, (b) 176.2

K243004 (a) 122.3, (b) 110.3

I711009 (a) 185.2, (b) 174.7

K157012 (a) 181.2, (b) 195.3

K404108 (a) 116.4, (b) 142.5

MidiPrep of pSB1C3 with RFP generator (P4)

Investigator: NA

Aim of the experiment: purification of pSB1C3 with RFP-Reportercasette for further processing (P74)

Procedure: MidiPrep was performed according to manufacturer's protocol (QIAprep MidiPrep, Qiagen)

Results:

Cloning of IRES-BirA (F33->F40) into digested F31 (pSB1C3)

Investigator: JH, LK

Aim of the experiment: Ligation of IRES-BirA (F29->F33->F40) into F31 (digested P40 by XbaI and PstI = pSB1C3 without insert), gelelectrophoresis and tranformation in XL1blue

Procedure:

F33 (PCR product of F29/gen synthesis 2) was digested with XbaI and PstI
Gelextraction of band at 1500 bp was executed by manufacturers protocol (Qiagen)
intermediate result: F40 with 6.6 ng/µL
Ligation mixtures were prepared as following:
9.6 µL F40, 0.4 µL F31, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase
Transformation: (Saturday)
Transformation of Ligation (F29+F31) into XL-1 blue was done according to the SOP. The plate was incubated until Sunday at 37°C.
3mL-cultures in LB+ 30µg/ml cam where inoculated on Sunday
Mini-prep according to manufacturer's protocol was done on Monday.

PCR, purification and digestion of P19 (EspP) and F28 (mRuby EGFR) for BioBrick creation

Investigator: JB, LK

Aim of the experiment: Amplification of EspP from P19 and mRuby/EGFR (F28) for creation of Biobricks

Procedure (for both fragments):

PCR according to the SOP (primers for P19: O13 and O03, primers for F28: VR and VF2)
PCR purification via the purification kit according to the manufacturer's protocol (concentrations: P19(EspP):119,5 ng/µl F28(mRuby):56,2ng/µl
Analysis on an 1% agarose gel using 5 µl purified PCR product
Restriction digestion with NgoMIV/SpeI (for both cases)
40µl DNA
1,5µl of each Enzyme
2µl ddH2O
5µl CutSmart Buffer
The tubes where incubated at 37°C for ~2 days.

Results: Analytical gel electrophoresis after PCR purification shows thick bands at roughly 1000 bp

Still to do:

Gel extraction of both signals for F28 and one signal for EspP-PCR
Ligation with appropriate vector (e.g. F30)
Transformation

Minipreps of F39 (strong RBS-pcat in pSB1C3)

Investigator: JB

Aim of the experiment: Amplification of F39 (ligation, pCat with strong RBS)

Procedure:

Miniprep according to the manufacturer's protocol
Resulting plasmid: P76
Concentration: 52 ng/µl

Minipreps of pSB1C3 with RFP generator (P4)

Investigator: JH

Aim of the experiment: purification of pSB1C3 with RFP-Reportercasette for further processing (P75)

Procedure:

Minipreps according to the manufacturer's protocol (with 8* 6 mL culture)
Resulting plasmid: P75
Concentration: 142.2 ng/µl [~200 µL]

Inoculation of colony from NanoLuc [P54, Repeat]

Investigator: JH

Procedure:

5 ml LB+Cam media
culture was inoculated with one colony
Incubation at 37°C overnight

Saturday, June 18th

Miniprep of P54 (NanoLuc)

Investigator: LK

Aim of the experiment: Purification of P54 (NanoLuc)

Procedure:

Miniprep according to the manufacturer's protocol
Resulting plasmid: pSB1C3 mit NanoLuc (P54, von )
Concentration: 497,9 ng/µl

Hybridisation of O19 and O20 (StrepTag)

Investigator: LK

Aim of the experiment: Hybridisation of the Strep-Oligos

Procedure: 2µl of each Oligo where diluted in 16µl ddH2O and incubated for 10 min. at 95°. Cooling down at RT for at least half an hour. Stored in fridge

Week 6 (June 20th - June 26th)

Monday, June 20th

Miniprep of F42 (IRES-BirA in pSB1C3)

Investigator: LK

Aim of the experiment: Purification of IRES-BirA Plasmids

Procedure:

Miniprep according to the manufacturer's protocol
Resulting plasmid: pSB1C3 with IRES-BirA

Next Steps:

analytical digestion with EcoRI+PstI and gel (expected bands at 1500 and 2000 Bp)
Sequencing

Results: Concentration: 583,5 ng/µl

PCR and Purification of BirA

Investigator: LK, JB

Aim of the experiment: Amplification of BirA-construct

Procedure:

PCR according to the SOP (primers: O17 and O18)
PCR purification via the purification kit according to the manufacturer's protocol
Analysis on an 1% agarose gel using 5 µl purified PCR product

Results:

Concentration: 185,8 ng/µl --> F41
Analytical gel shows no significant band at 960 Bp -->Repeat

Next Steps:

Repetition of PCR and analytical gel!

Gel and Gelextraction of P19 (QC EspP) and F28 (EspP and mRuby)

Investigator: LK

Aim of the experiment: Purification of both constructs for Ligation

Procedure:

Preperative gel according to SOP
The Purification was done according to the manufacturer's protocol. The EGFR gel-fragment was eluted in 50µl and the mRuby-fragment in 30µl (because of thin band)

Results:

One thick band just before 1000Bp and one lighter band just before 750 Bp. This fits to the lengths of EspP and mRuby.
Concentrations: EspP(now F43): 49,5ng/µl mRuby(now F44): 9,9ng/µl

Next Steps:

Ligation into pSB1C3

Sequencing of F42 (pSB1C3(IRES-BirA)), P54 (pSB1C3(NanoLuc)) , P74 (pSB1C3(RFP generator)) and P76 (pSB1C3(strong RBS-pCat))

Investigator: JL

Aim of the experiment: Sequencing of F42, P54, P74 and P76 in forward direction.

Procedure: Sequencing batches were prepared after manufacturer's protocol (15 µL plasmid DNA (50-100 µM) and 2 µL sequencing primer)

The different plasmids we prepared received the following barcodes:

F42 (VF2): FR11326601
P54 (VF2): FR11326600
P74 (VF2): FR11326599
P76 (VF2): FR11326598

PCR and Purification of genesynthesis 6 (iGEM6) Streptavidin/Traptactin

Investigator: NA

Aim of the experiment: Amplification of gen synthesis 6

Procedure: PCR according to the SOP (primers: VF2 and VR)

Next Steps:

PCR purification via the purification kit according to the manufacturer's protocol
Analysis on an 1% agarose gel using 5 µl purified PCR product
PCR purification via the purification kit according to the manufacturer's protocol
Analysis on an 1% agarose gel using 5 µl purified PCR product

PCR and Purification of BirA (F41)

Investigator: NA

Aim of the experiment: Amplification of BirA (F29)

Procedure: PCR according to the SOP (primers: O17 and O18)

Next Steps:

PCR purification via the purification kit according to the manufacturer's protocol
Analysis on an 1% agarose gel using 5 µl purified PCR product
PCR purification via the purification kit according to the manufacturer's protocol
Analysis on an 1% agarose gel using 5 µl purified PCR product

--> repeat with gene-synthesis 2 (F29 may not be the gene-synthesis 2)

Ligations of StrepTag, EspP and mRuby3 with F30 (digested pSB1C3)

Investigator: JH

Aim of the experiment: Ligations of StrepTag (O19+O20), EspP (F43) and mRuby3 (F44) into F30 (NgoMIV and SpeI; pSB1C3 without insert)

Procedure:

Ligation mixtures were prepared as following:
O19+O20: 1.7 (O19+O20), 8.3 μL F30, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase
F43: 4.6 μL F43, 5.4 µL F30, 2 μL F30, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase
F44: 8.1 μL F44, 1.9 μL F30, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase
Ligation was incubated overnight at 16 °C

Digestion of GSY5 (Streptactin; F27)

Investigator: LK

Aim of the experiment: Restricting GSY5 into StrepActin fragment (Streptavidin mutant) and Leptin fragment (Leptin is for Volker)

Procedure:

Restriction mix:

32µl DNA (F27)

10µl ddH2O

1µl of each enzyme (SpeI, HindIII, SapI)

5µl cut smart buffer

Next Steps:

Preperative gel, 1,5% Agarose, cut out and purify bands at 80 Bp and 425 Bp. (80 is leptin for volker and 425 is StreptActin for further cloning into pASK)

Results:

Tuesday, June 21st

Plating of BioBricks that didn't survive sequencing

Investigator: JB

Aim of the experiment: Instead of directly inoculating cultures with the transformed cells from the bacterial agar that was sent by the HQ, the bacterial agar was now used for overnight plating on agar plates containing the appropriate antibiotic resistance.

Procedure: Two methods were used for each BioBrick: For the first method, an inoculation loop was used for plating directly. For the second methods, the inoculation loop was used to inoculate a 50 µl LB culture that

Sequencing of various plasmids

Investigator: CG

Aim of the experiment: Sequencing of various plasmids with either VF2 or VR

Procedure: Refer to the “Inventarliste” for detailed informations on sequencing codes and primers. Sequencing batches were prepared according to manufacturer's protocol (15 µL plasmid DNA (50-100 µM) and 2 µL sequencing primer)

PCR of gene synthesises (iGEM_1) (mRuby_EGFR)

Investigator: CG

Aim of the experiment: iGEM_1_mRuby_EGFR (F28) for preparing the EGFR signal (at about 100 bp)

Procedure: Approach:

1µl DNA (diluted, 1:10)
25 µl 2x MasterMix
0,5µl dNTPs
2,5 µl forward Primer VF2
2,5µl reverse Primer VR
Fill up with water up to 50 µl

Setup: (calculated with NEB calc. http://tmcalculator.neb.com/#!/)

98°C_1min initiation step
98°C_10sec
66°C_30sec > step 2-4: 35 repeats
72°C_30sec
72°C_2min final step
4°_hold

Transformation of Ligations of F50 (StrepTag), F51 (EspP) and F52 (mRuby3) in pSB1C3

Investigator: JH

Aim of the experiment: Transformation of StrepTag (F50), EspP (F51) and mRuby3 (F52) in XL1 blue

Procedure: transformation in competent E. Coli XL1 blue according to protocol + rescue (repeat due to incubation with LB+Cam ! )

Result: plates (LB Cam) in incubator for further processing (37 °C)

Digestion of P9 (pASK75), P74 (pSB1C3), P26 (CMV promotor) and F47 (BirA)

Investigator: JB

Aim of the experiment: Digestion of P9 and P74 to gain the vectors pASK75 and pSB1C3, respectively, as well as digestion of F47 (PCR fragment of BirA) and P26 (CMV promoter) for the ultimate creation of biobricks

Procedure: P74 was digested in a total volume of 30 µl, while the others were digested in a total volume of 50 µl. Enzymes used were:

P74: XbaI and PstI
P9: HindIII and XbaI
F47: Xba I and PstI (didn’t work)
P26: SpeI and PstI

The digestions were incubated at 37°C for 40 minutes and were thereafter inactivated at 80°C for 5 mins.

Inoculation of cultures for minipreps for P76 (pCat + strong RBS)

Investigator: JB

Procedure: Inoculation of 2x5 ml cultures with P76 clones. Incubation at 37°C overnight.

Wednesday, June 22nd

Minipreps of P79 (pCat+RBS)

Investigator: JB

Procedure: According to the manufacturer's protocol.

Results: Concentration 212 ng/µl. Sent to sequencing

Transformation of ligation F56 (pASK75(Streptactin)), P60 (pSB1C3 (pC+AraC+pBad+GFPc)) , P70 (pSB1C3 (short linker))

Investigator: CG

Aim of the experiment:' Transformation of pASK75-Streptactin (F56) into E. coli XL1 blue, K577881 (P60) into BL21 and K243004 (P70) in XL1

Procedure: transformation in competent E. Coli XL1 blue according to protocol

Result: plates (LB + appropriate antibiotic) in incubator for further processing (37 °C)

Inoculation of colonies from K157001 (EGFR signal peptide), EspP (F50), mRuby (F51), Strep-Tag (F52)

Investigator: CG

Procedure:

2x 5 ml LB+Cam (Amp for K157001) media
Each culture was inoculated with one colony, for ligations 2 colonies each
Incubation at 37°C overnight

Plateing of K243004 (short linker), K243005 (middle linker) from stab cultures

Investigator: CG

Procedure: For both biobricks: stabing into the agar with the inocluation loop and resuspending in 50 µl LB media. Plating on Amp-agar.

Digestion of P64 (EGFR sgnal peptide) and P71 (CD4 signal peptide) for cloning into F57 (pSB1C3 (CMV promotor))

Investigator: CG

Aim of the experiment: Digestion of P67 and P71 for cloning the resulting fragments into the digested F57 fragement.

Procedure: both plasmids were digested in 50 µl, 3 µg for each plasmid DNA. 1 µl of XbaI and PstI, 5 µl Buffer, 20 µl DNA, 23 µl H2O. The digestions were incubated at 37°C overnight.

Preparative agarose gels for separation of digestion of P64 (EGFR sgnal peptide) and P71 (CD4 signal peptide)

Investigators: NA, JB

Aim of the experiment: Separation of digestion fragments of both digested PCR fragments as well as vectors

Procedure:

P74: XbaI and PstI -> Fragment corresponding to the pSB1C3 vector isolated
P9: HindIII and XbaI -> Fragment corresponding to the pASK75 vector isolated
F47: Xba I and PstI (didn’t work) –> only one fragment at 3 kbp present (weird since that was a gene synthesis pcr)
P26: SpeI and PstI -> Fragment corresponding to the cmv-promoter isolated

Gelextraction of P9, P74 and P26 was executed by manufacturers protocol (Qiagen)

Results:

F55: pASK75 (2,9 ng/µl)
F56: pSB1C3 (23,6 ng/µl)
F57: CMV-Promotor (5,9 ng/µl)

PCR of GSY2 (IRES-BirA) with O17/18

Investigators: LK

Aim of the experiment: Amplification of BirA, using new dilution of GSY2 this time, because last 2 PCRs showed confusing results (bands at 2500)

Procedure:

PCR was performed according SOP
Primers: O17 and O18
Annealing at 68°C

Next Steps:

PCR-Purification
Analytical Gel
Ligation into pSB1C3

QuickChange-PCR of pASK75 with O21 and O22

Investigators: LK

Aim of the experiment: Deleting NdeI from pASK (P03)

Procedure:

QC-PCR was performed according to SOP
Primers: O-021 and O-022
Annealing at 68°C
Elongation time: 3:30 min

Next Steps:

Digestion with DpnI at 37°C for 1h
Purification?
Preperative Gel (band at 960), purification
Ligation into pSB1C3

Verification of PCR and Digestion of F28 (gene synthesis 1)

Investigator: NA, LK

Aim of the experiment: Verification of successful PCR via gel electrophoresis and preparation of EGFR

Procedure:

Gel electrophoresis with 1 kb-ladder
Digestion: 42µl of PCR Purification, 1,5 µl of each enzyme (NgoMIV and SpeI), 5µl of cut smart buffer.
Incubation at 37°C over night

Results:

Next steps:

Preparative gel and gel extraction
Ligation into pSB1C3

Thursday, June 23th

Miniprep of E. coli Xl1-Blue transformed with ligation product P80/81 (mRuby3 K1/2), P82/83 (EspP K1/2), P84/85 (StrepTag K1/2) and Trafo of K157001

Investigator: Jan, Julian

Aim of the experiment: Miniprep of E. coli Xl1-Blue transformed with ligation product F50(K1,2), F51(K1,2), F52(K1,2) and Trafo of K157001

Procedure:

Miniprep was performed after manufacturer's protocol (QIAprep Miniprep, QIAGEN)
Concentrations:

Plasmid	c [ng/µl]
P80	432,7
P81	294,8
P82	450,5
P83	479,0
P84	108,0
P85	356,0
P86	47,2

PCR of gene synthesises

Investigator: CR

Aim of the experiment: iGEM_1_mRuby_EGFR (F28) for preparing the EGFR signal (at about 100 bp)

Procedure: Approach:

1µl DNA (diluted, 1:10)
25 µl 2x MasterMix
0,5µl dNTPs
2,5 µl forward Primer VF2
2,5µl reverse Primer VR
Fill up with water up to 50 µl

Setup: (calculated with NEB calc. http://tmcalculator.neb.com/#!/)

98°C_1min initiation step
98°C_10sec
66°C_30sec > step 2-4: 35 repeats
72°C_30sec
72°C_2min final step
4°_hold

QuickChange-PCR of pASK with O21 and O22

Investigators: CR

Aim of the experiment: Digestion of PCR product with DpnI to digest methylated DNA

Procedure:

PCR purification of BirA and mRuby/EGFR

Investigator: CR

Aim of the experiment: purification of PCR

Procedure: PCR purification via the purification kit according to the manufacturer's protocol The samples were renamed:

BirA: F59
mRuby/EGFP: F60

The samples were analysed on a 1% agarose gel. Samples were prepared after SOP.

Results:

Transformation of P60 (K577881; pC+AraC+pBad+GFPc K1) and QC P3 (pASK75(SA1))

Investigator: EF, JB

Aim of the experiment: Transformation of Q CP3 in XL1 blue; transformation of p60 in BL21

Procedure: transformation in competent E. Coli BL21 and XL1blue according to protocol

1µl p60 in BL21 7 µl Q CP3 in XL1 blue

Result: plates (+ rescue plates) incubating

Cloning of CD4- and EGFR-signal peptide into pSB1C3-CMV

Investigator: CR

Aim of the experiment: Digestion of P71 and P69 Procedure:

Digestions were prepared as following:
20 µl CD4 (P71); 1 µl XbaI; 1 µl PstI; 5 µl CutSmart; 23 µl ddH2O
7 µl pSB1C3-CMV; P26; 1 µl PstI; 1 µl SpeI; 2 µl CutSmart; µl ddH2O
20 µl EGFR-signal peptide (P67);1 µl XbaI; 1 µl PstI; 5 µl CutSmart; 23 µl ddH2O
Digestions were incubated for 3 h at 37 °C
The Samples CD4- and EGFR-signal peptide were applied to a 2% and the pSB1C3-CMV to a 1% agarose Gel

Results:

--> passt

Next steps:

Ligation of

Cloning of EGFR (F62) / CD4 (F61) signale peptide into pSB1C3-CMV (F63)

Investigator: CG

Aim of the experiment: Gelextraction and ligation of EGFR- and CD4-signal peptide into pSB1C3 and transformation

Procedure:

Gel extraction according to manufacturers protocol (Qiagen): F61 (CD4) 2 ng/µl, F62 (EGFR) 0.6 ng/ µl, F63 (CMV): 45 ng/ µl
Ligation: 1 µl T4 Ligase, 2 µl Ligase buffer, 7 µl H20, 1.8 µl vector and 8.2 µl EGFR insert or 4.3 µl vector and 5.7 µl CD4 insert
Transformation according to SOP
Plating on LB-Cam agar

Friday, June 24th

Analytical digestion and gelelectrophoresis of P83 (EspP K2) and P83 (StrepTag K2)

Investigator: Julian, Niklas, Luisa

Aim of the experiment: Analytical digestion and gelelectrophoresis of P82/83 (EspP K1/2) and P84/85 (StrepTag K1/2).

Procedure:

Batch for analytical digestion for P82-P85 with EcoRI-HF

volume	reagent
0.5/1.0 µl	Plasmid DNA (-/P84)
1 µl	CutSmart buffer (10x)
0.5 µl	EcoRI-HF(10 U/µl)
8/7.5 µl	ddH2O (-/P84)
=10 µl	TOTAL

500px

Sequencing of P80( mRuby3 K1), P83 (EspP K2) and P85 (StrepTag K2)

Investigator: Julian

Aim of the experiment: Sequencing of P80(mRuby3 K1), P83 (EspP K2) and P85 (StrepTag K2)

Procedure:

Sequencing batch were prepared after manufacturer's protocol. (15 µl of plasmid DNA (50 - 100 ng) and 2 µl sequencing primer). Sequencing primer VF2 was used

The different vectors we sequenced received the following barcodes:

mRuby3 in pSB1C3 (P80): FR11326590

EspP in pSB1C3 (P83): FR11326588

Streptag in pSB1C3 (P85): FR11326587

Transformation of E. coli XL1 blue with F64 (quickchanged P3(pSAm1))

Investigator: Niklas

Aim of the experiment: Transformation of E. coli XL1 blue.

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

1 µl of DNA was added to 50 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 950 µl LB-medium to each tube.

The cell suspension was plated on ampicillin plates (inclusive rescue plate) and incubated over night at 37 °C.

Gelextraction of F67(BirA), F68(mRuby), F69(EGFR-TMD), F70(pSB1C3) and F71(pSB1C3)

Investigator: Niklas

Aim of the experiment: Gelextraction of F67(BirA(Digest. F59 [EcoRI; SpeI])), F68(mRuby(Digest. F60 [NgoMIV; SpeI])), F69(EGFR-TMD(Digest. F60 [NgoMIV; SpeI]), F70(pSB1C3(digest. P74 [NgoMIV; SpeI]) and F71(pSB1C3(digest. P74 [EcoRI; SpeI])

Procedure:

Gelextraction was performed by manufacturers protocol (Qiagen).

Cloning of F59 (BirA) and F60 (EGFR-TMD) into pSB1C3

Investigator: CR

Aim of the experiment: Generate biobricks with EGFR-TMD and BirA

Procedure:

Digestions were prepared as following:
1. xµl F59 (BirA); 1 µl EcoRI; 1 µl SpeI; 3 µl CutSmart; 23 µl ddH2O
2. 2 µl P74 (pSB1C3 (RFP-generator); 1 µl NgoMIV; 1 µl SpeI; 3 µl CutSmart; 23 µl ddH2O
3. xµl F60 (mRuby/EGFR); 1 µl NgoMIV; 1 µl SpeI; 3 µl CutSmart; 23 µl ddH2O
4. 2 µl P74 (pSB1C3 (RFP-generator), 1 µl EcoRI; 1 µl SpeI; 3 µl CutSmart; 23 µl ddH2O
Digestion was incubated for 3 h at 37 °C

To Do:

Gel (already prepared)
Gelextraction
Ligation
Trafo

Results:

1. band: P74(NgoMiV, SpeI) 2. band: P74 (EcoRI, SpeI)

1. band: F59 2. band: F60

Transformation of EGFR-TMD-pSB1C3 and BirA-pSB1C3 ligations

Investigator: JB

Procedure: According to protocol. Plates were incubated overnight at 37°C.

Chemical biotinylation of BSA

Investigator: MT, JB

Procedure: BSA was chemically biotinylated with a 20x, 40x and 60x molar excess in two different buffers:100 mM Bicin (pH 8.85) and 100 mM borate (pH 8.85) with 50 mM NaCl respectively.

-> A total of six different tubes.

After one hour incubation at RT, the samples were put in the freezer

Inoculation of liquid cultures (F65 and F66)

Investigator: JB

Procedure:

Clones were picked for inoculation of 5 ml liquid cultures containing the appropriate antibiotic
Incubation overnight at 37°C/shaking

Saturday, June 25th

Miniprep of E. coli Xl1-Blue transformed with P60 (mRuby/EGFR),F58 (Ligation pASK75 + Streptactin), F65 (CMV + CD4), F66 (CMV + EGFR), P70 (Short Linker)

Investigator: Niklas

Procedure:

Miniprep was performed after manufacturer's protocol (QIAprep Miniprep, QIAGEN)
Concentrations:

Plasmid	c [ng/µl]
P87	81
P88	34,5
P89	86,3
P90	108,5
P91	417,4

Analytical digestion and gelelectrophoresis of F64 (quickchanged P3, pASK75(SA1)) for verification of success of quickchange

Investigator: Niklas

Procedure:

Analytical digestion with NdeI and gelelectrophoresis. If quickchange worked there should be a band at about 3200 bp (only one restriction site left)

Incubation over night at room temperature.

Analytical gelelectrophoresis was performed at 90 V for 60 min.

Results:

Just a band showing a few bp (Primer), there is no plasmid band -> Quickchange did not work

Inoculation of colonies from Ligation of F69 + F70 (EGFR-TMD in pSB1C3) and F44 + F33 (mRuby in pSB1C3)

Investigator: Niklas

Procedure:

6x 4 ml LB+Cam media

Each culture was inoculated with one colony

Incubation at 37°C overnight

Sunday, June 26th

Miniprep of E. coli Xl1-Blue transformed with ligation product F44 + F30 (mRuby3 in pSB1C3), F66 + F70 (CMV+EGFR in pSB1C3)

Investigator: Luisa

Aim of the experiment: Extracting F44 + F30 (mRuby3 in pSB1C3), F66 + F70 (CMV+EGFR in pSB1C3) from E.coli XL-1-blue

Procedure:

Miniprep was performed after manufacturer's protocol (QIAprep Miniprep, QIAGEN)
Concentrations:

Plasmid	c [ng/µl]
P92	162,9
P93	447,9

Repetition of Quick-Change PCR of P3 (pASK + SAm1)

Investigator: Luisa

Procedure:

The QC-PCR was performed according the SOP.

Reaction Mix:

volume	reagent
1,25 µl	Primer O21
1,25 µl	Primer O22
1 µl	dNTP-mix
5 µl	Pfu-Ultra-II reaction buffer
1 µl	template DNA (1:10 dilution of p3)
0,5 µl	Pfu-Ultra-II Polymerase
40,5 µl	ddH2O

digestion of PCR-Product with DpnI for 1h at 37°C

now labeled P94

Transformation of E. coli XL1 blue with P94 (quickchanged P3(pSAm1))

Investigator: Luisa

Aim of the experiment: Transformation of E. coli XL1 blue.

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

10 µl of DNA was added to 100 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 950 µl LB-medium to each tube.

The cell suspension was plated on ampicillin plates (inclusive rescue plate) for pASK (F72) and on chloramphenicol plates for P92 and P93 and incubated over night at 37 °C in the incubator.

Analytical digestion and gelelectrophoresis of P92 (mRuby), P93 (CMV + EGFR) and P94 (pASK75)

Investigator: Luisa

Aim of the experiment: Analytical digestion and gelelectrophoresis of P92 (mRuby), P93 (CMV + EGFR) and P94 (pASK75).

Procedure:

Batch for analytical digestion for P92 and P93 with EcoRI-HF and PstI-HF

volume	reagent
1 µl	Plasmid DNA
1 µl	CutSmart buffer (10x)
0.5 µl	EcoRI-HF(10 U/µl) and PstI-HF (10 U/µl) for P92/93, NdeI (10 U/µl) for P94
7.5/7 µl	ddH2O
=10 µl	TOTAL

Results:

1. band (P92): no mRuby at 700bp visible, only empty vector
2. band (P93): empty vector and EGFR --> perfect
3. band (P94): no signal at all --> repetition of QC-PCR

Week 7 (June 27th - July 3rd)

Monday, June 27th

Sequencing of P67 (EGFR-Signalpeptid)

Investigator: Niklas

Procedure:

Sequencing batch was prepared after manufacturer's protocol. (15 µl of plasmid DNA (100 ng) and 2 µl sequencing primer (VF2))

FR11326586

Repetition of Quick-Change PCR of P3 (pASK + SAm1)

Investigator: Luisa

Procedure:

The QC-PCR was performed according the SOP.

Reaction Mix:

volume	reagent
1,25 µl	Primer O21
1,25 µl	Primer O22
1 µl	dNTP-mix
5 µl	Pfu-Ultra-II reaction buffer
1 µl	template DNA (1:10 dilution of p3)
0,5 µl	Pfu-Ultra-II Polymerase
40,5 µl	ddH2O

Digestion of PCR-Product with DpnI for 1h at 37°C.

Transformation of 10µl into component E.coli XL-1-blue, according to SOP (1h incubation at 37°C necessary despite AmpR).

PCR of Genesynthesis 3 and 4

Investigator: Luisa

Aim of Experiment: Amplification of Genesynthesis 3 (contains BAP and IGKappa) and 4 (contains A3C5-tag and BM40)

Procedure:

The PCR was performed according the SOP.

Reaction Mix:

volume	reagent
2,5 µl	Primer VF2
2,5 µl	Primer VR2
1 µl	dNTP-mix
10 µl	Q5 Polymerase reaction buffer
1 µl	template DNA (1:10 dilution of p3)
0,5 µl	Q5-Polymerase
18 µl	ddH2O

Setup: iGEM_standard (Promega-cycler)

temperature	time
98°C	2min
98°C	10sec
66°C	30sec
72°C	30sec
72°C	2min
4°C	hold

the batches were then purified using the Quiagen PCR-Purification Kit.

Analytical digestion and gelelectrophoresis of P88 (pASK75(Steptactin)), P89 (pSB1C3(CMV+CD4) and P90 (pSB1C3(CMV+EGFR-Signal peptide)

Investigator: Niklas

Aim of experiment: Analytical digestion and gelelectrophoresis of P88 (pASK75 + Streptactin, former F58), P89 (CMV + CD4, former F65) and P90 (CMV + EGFR-signal-peptide, former F66)

Procedure:

Batches for analytical digestions:

P88: EcoRI

P89: EcoRI and PstI

P90: EcoRI

volume	reagent
5,8/2,3/1,8 µl	Plasmid DNA (P88/P89/P90)
1 µl	CutSmart buffer (10x)
0.5 µl	EcoRI-HF(10 U/µl)/ PstI
required amount for total volume of 10 µl	ddH2O

Ligation of F67 (BirA) and F71 (vector fragment pSB1C3), Transformation of E. coli XL1 blue afterwards

Investigator: Niklas

Aim of the experiment: Ligation of F67 (BirA) and F71 (empty pSB1C3), Transformation of E. coli XL1 blue afterwards.

Procedure:

volume	reagent
2,4 µl	Vektor
7,6 µl	Insert
2 µl	10X DNA-Ligase-buffer
1 µl	T4-Ligase
7 µl	ddH₂O
=20 µl	TOTAL

CaCl2 competent E. coli XL1-Blue cells were taken out of stock in -80 °C freezer and were gently thawed on ice.

7 µl of DNA was added to 100 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 750 µl LB-medium to each tube.

Incubation for 1 hour at 37 °C

The cell suspension was plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C in the cell-culture shaker.

next step: analytic digestion of transformation was successful

Digestion of PCR on genesynthesis 3 and 4, and pSB1C3

Investigator: Luisa

Aim of experiment: Division of Leptin, IGKappa, A3C5, BM40 and BAP using SapI, HindIII, XbaI, AgeI for both batches.

Procedure:

Batches for analytical digestions:

volume	reagent
1 µl each	enzyme (SapI, HindIII, XbaI, AgeI)
5 µl	CutSmart buffer (10x)
41 µl	DNA (purified PCR-products of GSY3 and 4)

Additionally 10µg of the vector P74 was digested with XbaI and AgeI in 100µl batch (2µl of each enzyme, 10µl of Cut-Smart buffer). Digestion was performed over night and purified via gelelectrophoresis and gelextraction according to the manufacturer's protocoll. --> Now labeled F80.

Preparative digestion and gelelectrophoresis of P80 , P78 and P85

Investigator: Julian

Aim of experiment: Preparative digestion and gelelectrophoresis of P80 (mRuby3), P78 (NanoLuc) and P85 (Strep-Tag)

Procedure:

Batches for analytical digestions:

P80 and P78: EcoRI and AgeI

P85: EcoRI and NgoMIV

volume	reagent
10 µl	Plasmid DNA
32 µl	ddH2O
5 µl	CutSmart buffer (10x)
1.5 µl	each enzyme(10 U/µl)/ PstI
50 µl	TOTAL

Ligation of F75 (mRuby) and F76 (NanoLuc) into F74 (pSB1C3 with Strep-Tag) and Transformation into E. coli XL1 blue

Investigator: Luisa

Aim of the experiment: Ligation of F75 (mRuby) and F76 (NanoLuc) into F74 (pSB1C3+Strep-Tag), Transformation of E. coli XL1 blue afterwards.

Procedure:

volume	reagent
4,3µl(for F75), 8,2µl (for F76)	Vector
12,7µl (F75), 8,8 (F76)	Insert
2 µl	10X DNA-Ligase-buffer
1 µl	T4-Ligase
=20 µl	TOTAL

Ligation was incubated at RT for 1,5h.

CaCl2 competent E. coli XL1-Blue cells were taken out of stock in -80 °C freezer and were gently thawed on ice.

7 µl of DNA was added to 100 µl of competent cells and gently mixed.

15 min incubation on ice

5 min. heat shock at 37 °C

Adding of 950 µl LB-medium to each tube.

Incubation for 1 hour at 37 °C

The cell suspension was plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C in the incubator.

Chemical biotinylation of BSA

Investigator: Niklas

Procedure:

BSA was chemically biotinylated with a 20x and 40x molar excess:

10 ml of 100 mM borate buffer with 50 mM NaCl (pH 8.85)

dissolve BSA (10 mg/ml)

Add biotin-NHS-ester: 20,5 mg for 40x molar excess

reaction over night

Tuesday, June 28th

Preparative digestion and gelelectrophoresis of P83 (EspP) and P29 (DoubleTerminator)

Investigator: Julian

Aim of experiment: Preparative digestion and gelelectrophoresis of P83 (EspP) and P29 (DoubleTerminator)

Procedure:

Batches for analytical digestions:

P83: EcoRI and SpeI

P29: EcoRI and XbaI

volume	reagent
6.5/13 µl	Plasmid DNA (P83/P29)
35.5/29 µl	ddH2O (P83/P29)
5 µl	CutSmart buffer (10x)
1.5 µl	each enzyme
50 µl	TOTAL

Preparative gelelectrophoresis was performed at 80 V for 80 min

Gelelectrophoresis of F73 (pSB1C3 digst. EcoRI, AgeI)

Investigator: Julian

Aim of experiment: gelelectrophoresis of P80 (mRuby3), P78 (NanoLuc) and P85 (Strep-Tag)

Procedure: Preparative gelelectrophoresis was performed at 100 V for 45 min using a pocket spanning over the full width of the 1% agarose gel

Wednesday, June 29th

Transformation of F83 (EspP-Fragment in Double Terminator + pSB1C3), F84 (GSY3 + pSB1C3) F85 (GSY4 + pSB1C3)

Investigator: Niklas

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

7 µl of DNA was added to 50 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 950 µl LB-medium to each tube.

The cell suspensions were plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C.

Thursday, June 30th

Transformation of new E. coli XL1-blue (P75), additional plating of untransformated XL1-blue

Aim of experiment: Quality assurance

Investigator: Niklas

Procedure:

the new competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

1 µl of DNA was added to 50 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 950 µl LB-medium to each tube.

The cell suspension was plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C.

additional plating of untransformated XL1-blue on Tet-, Cam-, Amp- and Kan-plates

Result:

After 12 hous of incubation there were some (~20) colonies on the 50µl-plate transformed with Cam-resistence-plasmids. The transformation has been succesful, though cells grow slow.
There were no colonies on the kan-, amp- and cam- plates with the untransformed E.Coli. Hence we can assume that there are no other plasmids with resistences against kan, amp or cam in our batch of competent cells.

There are cells on the tet-plate. This was expected.

Friday, June 31th

Transformation of P9 (pASK with Streptavidin WT) and QC-PCR product into new E. coli XL1-blue

Aim of experiment: Tranforming pASK without NdeI-cutting point into E.coli (two batches from diffrent approches were tested). And Transforming pASK_SA1 into E.coli XL-1-blue.

Investigator: Luisa

Procedure:

the new competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

10 µl of DNA was added to 50 µl of competent cells and gently mixed.

15 min incubation on ice

30 sec. heat shock at 42 °C

Adding of 950 µl LB-medium to each tube. 1h hour incubation at 37°C.

The cells were plated out on Amp-plates (inclusive rescue plate) and incubated over the weekend at 30 °C.

Week 8 (July 04–10)

Monday, July 04

Repetition of the Transformation of QC-PCR product into new E. coli XL1-blue

Aim of experiment: Tranforming pASK without NdeI-cutting point into E.coli (two batches from diffrent approches were tested).

Investigator: Luisa

Procedure:

the new competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

10 µl of DNA was added to 50 µl of competent cells and gently mixed.

15 min incubation on ice

30 sec. heat shock at 42 °C

Adding of 950 µl LB-medium to each tube. 1h hour incubation at 37°C.

The cells were plated out on Amp-plates (inclusive rescue plate) and incubated over the weekend at 30 °C.

Transformation of P9 (Streptavidin in pASK75) into E. coli BL-21

Aim of experiment: Tranforming pASK with Streptavidin into E.coli BL-21 for Expression.

Investigator: Niklas

Procedure:

the new competent E. coli BL-21 cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

1 µl of DNA was added to 50 µl of competent cells and gently mixed.

15 min incubation on ice

5&nbspmin. heat shock at 37 °C

Adding of 950 µl LB-medium to each tube.

The cells were plated out on Amp-plates (inclusive rescue plate) and incubated over the weekend at 30 °C

Transformation of F94 (hGH polyadenylation sequence and Nanoluc with StrepTag)

Investigator: Javier

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

7 µl of DNA was added to 50 µl of competent cells and gently mixed.

30 min incubation on ice

45 sec. heat shock at 42 °C

Adding of 950 µl LB-medium.

The cell suspensions were plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C.

Miniprep of E. coli Xl1-Blue transformed with ligation product P108 and P113 (EspP-Fragment in Double Terminator, F81+F82), P109 and P110 (GSY3+ F73 vector AgeI+XbaI ), P111 and P112 (GSY4+ F73 vector AgeI+XbaI)

Investigator: Javier

Aim of the experiment: Extracting P108 and P113 (EspP-Fragment in Double Terminator, F81+F82), P109 and P110 (GSY3+ F73 vector AgeI+XbaI ), P111 and P112 (GSY4+ F73 vector AgeI+XbaI) from E.coli XL-1-blue

Procedure:

Miniprep was performed after manufacturer's protocol (QIAprep Miniprep, QIAGEN)
Concentrations:

Plasmid	c [ng/µl]
P108	116,2
P109	86,6
P110	136,8
P111	144,8
P112	163,2
P113	123,3

Preparative digestion and gelelectrophoresis of P74 (RFP-Gen.)

Investigator: Julian

Aim of experiment: Preparative digestion and gelelectrophoresis of P74 (RFP-Gen.)

Procedure:

Batch for analytical digestion:

P74: EcoRI and SpeI

volume	reagent
2.5 µl	Plasmid DNA
39.5 µl	ddH2O
5 µl	CutSmart buffer (10x)
1.5 µl	each enzyme
50 µl	TOTAL

Preparative gelelectrophoresis was performed at 90 V for 45 min

Result: pSB1C3 (EcoRI und SpeI) F95

File:Muc16 F95 0407.jpeg

Cloning of F96 (BirA in pSB1C3)

Investigator: Julian

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

10 µl of DNA was added to 50 µl of competent cells and gently mixed.

5 min incubation on ice

30 s heat shock at 37 °C

Adding of 950 µl LB-medium

Incubation at 37 °C

The cell suspension was plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C

Tuesday, July 05th

Preparing of 200 ml TB medium for inoculation of 2 L medium on Thursday

Investigator: Niklas

Procedure:

2.4 g Tryptone 4.8 g yeast extract

800 µl Glycerine

adjust to 180 ml with ELGA-water

seperately: 3.29 g H₂KPO₄ + 0,46 g K₂HPO₄ with ELGA water (Volume = 20 ml)

Digestion of F49 (BirA) with EcoRI and SpeI and cloning in F95 (pSB1C3)

Investigator: Clemens

Procedure:

Digestion of F49 with EcoRI and SpeI

volume	reagent
20 µl	Plasmid DNA (F49)
5 µl	CutSmart buffer (10x)
1 µl	EcoRI-HF(10 U/µl)
1 µl	SpeI(10 U/µl)
23 µl	ddH2O
=50 µl	TOTAL

Digestion was incubated for 1.5 h at 37°C
Digestion was applied to a 1% agarose-gel
Gel ran at 80V for 35 min

File:Muc16 digestF49 0507.jpeg

BirA had a length of 1012 bp
Upper probe was cut from the gel
BirA was purified with gelextraction which was performed by manufacturer's protocol
Concentration was measured
- [F97]= 12.4
Ligation of F97 into pSB1C3 (F95)

volume	reagent
1.2 µl	Vector: pSB1C3 (F95)
8.8 µl	Insert: BirA (F97)
2 µl	T4 DNA Ligase buffer
fill up to 20 µl	dd H₂O
1 µl	T4 ligase
=21 µl	TOTAL

Ligation was incubated at RT for 30 min
Transformation:
- Transformation was performed after SOP
- 7 µl were used for transformation in E. coli XL1blue

Sequencing of P108 - P112

Aim of experiment: Sequencing

Investigator: Niklas

Procedure:

sequencing batches after protocol with following barcodes:

P108 (EspP-Fragment in Double Terminator (F83)) FR11326572 (VF2)

P109 (GSY3+ F73 Leervektor AgeI+XbaI (F84)) FR11326576 (VF2)

P110 (GSY3+ F73 Leervektor AgeI+XbaI (F84)) FR11326575 (VF2)

P111 (GSY4+ F73 Leervektor AgeI+XbaI (F84)) FR11326574 (VF2)

P112 (GSY4+ F73 Leervektor AgeI+XbaI (F84)) FR11326573 (VF2)

NEB Turbo CaCl₂-competent cells

Investigator: Vivien

Procedure:

Inoculate 50 mL LB with 0.5 mL overnight culture of NEB Turbo cells

Incubate at 37 °C for 7 h; final OD₅₀₀: 0.357

Very little growth in the course of the last hour; OD₅₀₀ 0.45 required

Experiment discontinued. Inoculated 3 further colonies in 5 mL LB for o/n growth (37 °C). Repeat experiment on Wed, July 6

Miniprep P114 (NanoLuc + StrepTag + Poly-A in pSB1C3(F94))

Investigator: Niklas

Procedure:

Miniprep was performed after manufacturer's protocol (QIAprep Miniprep, QIAGEN)

Analytical digestion and gelelectrophoresis of P114 and P115

Investigator: Niklas

Aim of the experiment:

Analytical digestion and gelelectrophoresis of P114 and P115 (NanoLuc + StrepTag + Poly-A in pSB1C3 K1 and K2)

Procedure:

Batch for analytical digestion for P114 and P115 with EcoRI+PstI

volume	reagent
1.75 µl	Plasmid DNA P114/P115
1 µl	cut smart (10x)
0.5 µl	EcoRI
0.5 µl	PstI
6,25 µl	ddH2O
=10 µl	TOTAL

Incubation for 45 min at 37 °C.

Analytical gelelectrophoresis was performed at 90 V for 60 min.

Results:

File:Muc16 digestP114 P115 0507.jpeg

1 kbp ladder DNA ladder	P114	P115
	X	X

Inoculation of Quick change of P88 (pASK75 (Streptactin)) preculture

Investigator: Clemens

Procedure:

four colonies were picked from plate
Cells were inoculated in 5 mL LB medium (ampicillin 1:1000)

Analytical digestion of P108 and P113 (both EspP + double terminator (F83)) with EoRI and PstI

Investigator: Clemens

Procedure:

Digestion of F49 with EcoRI and SpeI

volume	reagent
1 µl	Plasmid DNA (P108/P113)
1 µl	CutSmart buffer (10x)
0.5 µl	EcoRI-HF(10 U/µl)
0.5 µl	PstI(10 U/µl)
7 µl	ddH2O
=10 µl	TOTAL

Digestion was incubated for 1.5 h at 37°C
Digestion was applied to a 1% agarose-gel
Gel ran at 80V for 35 min

File:Muc16 analyt.digest.P108 P113 0507.jpeg

P108 and P113 showed the right bands

Wednesday, July 06th

Sequencing of P108 (EspP-Fragment in Double Terminator (F83))

Investigator: >Niklas

Procedure:

sequencing batches after protocol with following barcodes:

P108 (EspP-Fragment in Double Terminator (F83)) FR11326572 (VR)

Digestion of P75 (RFP-Generator) with HincII + dephosphorylation

Investigator: Niklas

Aim of experiment: Blunt-Ligation of BirA into pSB1C3

Procedure:

Digestion of P75 (RFP-Generator) with HincII + dephosphorylation

volume	reagent
3 µl	Plasmid DNA (P75)
2 µl	CutSmart buffer (10x)
0.5 µl	HincII
1 µl	Fast AP (for dephosphorylation)
14.5 µl	ddH2O
=20 µl	TOTAL

Digestion was incubated for over night at 37°C

next steps: PCR of GSY2 with O17 and O18 + phosphorylation, Ligation in digested pSB1C3 afterwards

Cloning of A3C5 Tag into the MiddleLinker-Plasmid

Investigator: Christoph

Aim of experiment: Cloning of A3C5 Tag into the MiddleLinker-Plasmid

Procedure:

Digestion of Middle_Linker Plasmid (P69) with AgeI and PstI

volume	reagent
0.3 µl	Plasmid DNA (69)
2 µl	CutSmart buffer (10x)
1 µl	AgeI
1 µl	PstI
1 µl	Fast AP (for dephosphorylation)
14.5 µl	ddH2O
=20 µl	TOTAL

volume	reagent
0.3 µl	Plasmid DNA (P112)
2 µl	CutSmart buffer (10x)
1 µl	NgomIV
1 µl	PstI
14.5 µl	ddH2O
=20 µl	TOTAL

Digestion was incubated for over night at 37°C, heat inactivation at 80°C for 20 min.

volume	reagent
2 µl	digested Middle-Linker (F99)
8 µl	digested A3C5 (F100)
2 µl	10x Ligase Buffer
1 µl	Ligase
7 µl	ddH2O
=20 µl	TOTAL

Transformation according to SOP in E. coli XL1 blue

Picking of of E. coli XL1 blue with Streptactin in quickchanged pASK75, F84 (digested GSY3), F85 (digested GSY4)

Investigator: Niklas

Procedure:

Streptactin in quickchanged pASK75: Colonies were picked from Amp-plates. (10x)

F84/F85: Colonies were picked from Cam-plates. (8x each)

Picked pipette tips was transferred into cell-culture tubes with air-permeable, sterile cover. Each tube contains 4 mL of LB-medium + 4 µL of the proper antibiotic.

These tubes were transferred in a cell culture shaker at 37 °C and were incubated overnight

Quick Change of mRuby Plasmids

Investigator: Christoph

Aim of experiment: Correction of wrong amino acid within the mRuby sequence

Procedure:

QC according to manufacturers protocol

volume	reagent
10 ng (= 0,3 µl 1:10)	Plasmid DNA (80)
5 µl	10x Pfu Ultra II Buffer
1.25 µl	O23
1.25 µl	O24
0.5 µl	Pfu Ultra II
1 µl	dNTPs
40.7 µl	ddH2O
=50 µl	TOTAL

volume	reagent
10 ng (= 0,3 µl 1:10)	Plasmid DNA (100)
5 µl	10x Pfu Ultra II Buffer
1.25 µl	O23
1.25 µl	O24
0.5 µl	Pfu Ultra II
1 µl	dNTPs
40.7 µl	ddH2O
=50 µl	TOTAL

PCR: 2 min. 98°C initial denaturation, 10 sec. 98°C, 30 sec. Annealing st 60 °C, 5 min 68°C, 35 Cycles

1 h at 37°C DpnI Digestion

Transformation according to SOP in E. coli XL1 blue, QC on mRuby-Strep (F103) was also transformed in E. coli Turbo cells for further investigating the growth rate

Miniprep of Quick Change of pASK75-Streptactin + analytical digestion with Nde1

Investigator: Jan

Procedure:

Miniprep using the kit according to the manufacturer's protocol.

Although cultures seemed to have grown properly, very low and unreliable DNA concentrations were obtained via Nanodrop measurement and no fragment at all could be detected via analytical agarose gel electrophoresis after 90 minutes digestion with Nde1

Creation of competent NEB Turbo cells

Investigator: Jan

Procedure:

250 µl of precultures were used to inoculate 50 ml LB-medium
After an OD=0.45 was reached, cells were put on ice and made competent according to the manufacturer's protocol
50 µl aliquots of competent cells were frozen in liquid nitrogen and stored at -80°C until further use

Inoculation of a BL21 pBAD-GFP (P60) preculture

Investigator: Jan

Procedure:

A single clone was picked in order to inoculate 5 ml LB medium (+Cam)
Culture was grown overnight at 37°C

Inoculation of a BL21 preculture for Streptavidin production (P8)

Investigator: Jan

Procedure:

A clone was picked for the inoculation of 5 ml LB medium
After 6-8 hours of incubation, the 5 ml preculture was used for the inoculation of a 50 ml LB preculture

Thursday, July 07

PCR Amplification of birA (GSY 2)

Investigator: Vivien

Aim: Amplify birA gene

Procedure:

Prepared PCR mix (25 μL reaction volume): NEB Q5 High-Fidelity 2× Master Mix (12.5 μL), ddH₂O (9.5 μL), F29 (1 μL), O17 and O18 (1 μL each)

Cycling protocol: start 1.5 min, 98 °C; 35 cycles 30 s, 98 °C – 45 s, 72 °C – 30 s, 72 °C; final elongation 5 min, 72 °C; end 4 °C

Purified via Quiagen PCR Purification kit following manufacturer's instructions. DNA eluted from column by adding 50 μL EB buffer and heating at 37 °C for 5 min prior to centrifugation.

Results: DNA concentration: 82.7 ng/μL. Stored as F102 at –20 °C

Induction of Streptavidin

Investigator: Vivien

Aim: Induce streptavidin production

Procedure:

Inoculated 2 L TB medium with 50 mL o/n pre-culture and added 2 mL ampicillin (10 mg/mL in 50% EtOH)
Let grow (37 °C, 200 rpm) until OD₅₀₀=0.622 (c. 2.5 h)
Induced with anhydrotetracycline (1:10,000 i.e. 200 μL of 2 mg/mL stock)
Let grow (37 °C, 200 rpm) for 4 h

Results: Induced culture for harvesting (see below)

Production of eGFP

Investigator: Clemens, Vivien, Christoph

Aim: Produce eGFP

Procedure:

Inoculated 50 mL LB+Cam medium with 0.5 mL o/n pre-culture

Let grow (37 °C, 200 rpm) until OD₅₀₀=0.58

Induced with 0.1 mM arabinose (i.e. 100 μL of 50 mM stock)

After 7 h of induction the cells were stored in the fridge overnight for maturation of the GFP-chromophore

Results:

Harvesting of Streptavidin

Investigator: Niklas

Aim of the experiment: Recombinant expression and purification of streptavidin

Procedure:

After expression, cultures were transferred into centrifuge tubes and spun down in the centrifuge (4 °C, 5000 rpm, 20 min, F4X1L rotor)
The supernatant was discarded, and the pellet was transferred into a Falcon and frozen
next steps: resuspending and homogenizing in the PANDA

Friday, July 08

Analytical Digest of mRuby3 Constructs

Aim of experiment: Verify integration of mRuby3 constructs in F103 and F104

Investigator: Vivien

Procedure:

Mixed 16 μL F103 (or 8 μL F104 plus 8 μL ddH₂O) with 2 μL 10× CutSmart buffer and 1 μL each of EcoRI-HF and PstI-HF (20 μL total volume)

Incubated for 45 min at 37 °C

Subjected to gel electrophoresis (1% agarose, 80 V, 120 min)

Results: No band around 700 bp as expected for mRuby3 constructs

Picking clones and inoculating cultures for F101 and F103

Investigator: Jan

Procedure:

All clones available (only two for F101, one for F103) were picked and used to inoculate 5 ml of LB medium containing the appropriate antibiotic
Cultures were incubated at 37°C overnight

Solubilization, lysis and unfolding of streptavidin

Investigator: Jan

Procedure:

According to protocol -> lysis of pellet (19.2 g) in 58 ml lysis buffer (50 mM Tris/HCl pH 8, 1 mM EDTA)
As only two liters of medium were used, the Panda couldn't be utilized for cell lysis -> French Press was used
Cells were additionally submitted to ultrasonic treatment
Centrifugation of cells, casting away the supernatant and resolubilizing the pellet in 5 ml GdmCl (6M, pH 1.5)

Sequencing of P88

Aim of experiment: Verification of QC

Investigator: Julian

Procedure:

Sequencing batch was prepared after manufacturer's protocol. (15 µl of plasmid DNA (100 ng) and 2 µl sequencing primer (PR1))

FR11326565

Transformation of P75 (RFP-Generator), F101 (middle linker+ A3C5), P125 (dig. GSY4) into E. coli XL1-blue and P75 in NEB Turbo E. coli

Investigator: Niklas, Vivien

Procedure:

the competent E. coli cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

1 µl of DNA (6 µl for Ligation F101) was added to 50 µl of competent cells and gently mixed.

30 min incubation on ice

5&nbspmin. heat shock at 37 °C

30 min incubation on ice

Adding of 950 µl LB-medium to each tube.

The cells were plated out on Cam-plates/Amp-plate for F101 (inclusive rescue plate) and incubated over the weekend at 30 °C

QuickChange-PCR of P80 (O23 and O24) and P100 (O19 and O20)

Investigators: Niklas

Aim of the experiment: Changing of amino acid

Procedure:

the batches were split, each batch contained only one primer, the batches were pooled after 15 cycles (1 µl Polymerase is added)
Annealing at 55°C

volume	reagent
1.25µl	O23/O24 and O19/O20
0,5 µl	dNTP-mix
1 µl	1:100 P80 / P100
2.5 µl	Pfu Ultra II-buffer
0.5 µl	Pfu Ultra II Polymerase
19.25 µl	dd H₂O
4 x 25 µl	TOTAL

Preperative gelelektrophoresis of F102 (PCR of BirA) + phosphorylation and ligation into pSB1C3

Investigator: Luisa

Aim of experiment: Blunt-Ligation of BirA into pSB1C3

Procedure:

The whole PCR-product was applied to a 1% agorose gel. After runnig the gel two lines where visible: one at 1000Bp and one at ~500Bp.

The 1000 Bp band was cut out and purified with the Gelextraction kit according to manufacturer's protocoll. Concentration: 41,5ng/µl.

The DNA was phosphorylated as follows:

volume	reagent
15 µl	DNA (~1pmol)
2 µl	Ligase buffer (10x)
1 µl	T4 Polynukleotide-Kinase (for phosphorylation)
2 µl	ddH2O
=20 µl	TOTAL

The batch was incubated for 20 min at 37°C and then the enzyme was inactivated for 10 min at 75°C.

The phosphorylated DNA was then ligated into prepared (HincII-digested) pSB1C3 as follows:

volume	reagent
2,3 µl	Vector
7,7 µl	Insert (BirA)
2 µl	Ligase Buffer (10x)
1 µl	T4 Ligase
7 µl	ddH2O
=20 µl	TOTAL

next steps: Transformation into E.coli Xl-1-blue.

Digestion of P78, P123 (for BAP-Nanoluc-construct),P122 (IgKappa for CMV-IgKappa-construct), P89, P114 (for CMV-EGFR-Nanoluc-StrepTag-PolyA-construct)

Investigator: Luisa

Aim of experiment: Getting of BAP-Nanoluc-construct, CMV-IgKappa-construct and CMV-EGFR-Nanoluc-StrepTag-PolyA-construct.

Procedure:

DNA was digested according to the following table:

volume	reagent
3 µg (for P78, P123 and P122) and 1,5 µg (for P89, P114)	DNA
5 µl	CutSmart buffer (10x)
1,5 µl of NgoMIV and PstI	for P78
1,5 µl of AgeI and PstI	for P123
1,5 µl of XbaI and PstI	for P122
1,5 µl of AgeI and PstI	for P189
1,5 µl of NgoMIV and PstI	for P123
up to 50µl	ddH2O
=50 µl	TOTAL

Results: Concentrations: P78 now F106: 2,7 ng/µl, P89 now F107: 14,4 ng/µl. Gelextractions of P114, P122 and P123 didn't contain DNA. (To few DNA available)

next steps: Retransformation of verified clones (P114, P89) into Xl-1-blue for amplification of plasmid.

Repetition of digestion of P122 and P123 with more DNA (10µg!), then Gel with 100Bp ladder!

Repetition of digestion of P123 (BAP for BAP-Nanoluc-construct) and P122 (IgKappa for CMV-IgKappa-construct)

Investigator: Luisa

Aim of experiment: Getting of BAP-Nanoluc-construct, CMV-IgKappa-construct

Procedure:

DNA was digested according to the following table:

volume	reagent
10 µg → 20µl	DNA
5 µl	CutSmart buffer (10x)
1,5 µl of AgeI and PstI	for P123
1,5 µl of XbaI and PstI	for P122
up to 50µl	ddH2O
=50 µl	TOTAL

Incubation at 37°C over night.

next steps: Gel with 100Bp ladder and Gelex. Then Ligation with prepared vectors from former digestion (F106 an F63)

Week 9, July 11–17

Monday, July 11

MiniPreps of pSb1C3-Middle Linker+A3C5, -BM40, -CMV-EGFR Retrafo, Streptactin in QC pASK75

Investigator: Christoph

Aim of the experiment: Plasmid preparation, analytic digestion, sequencing

Procedure:

MiniPrep was performed according to manufacturer's protocol (QIAprep MiniPrep, Qiagen)

Analytic digestion with 0.25 µL EcoRI, 0.25 µL PstI (HF) for pSB1C3 plasmids and 0.5 µl NdeI for pASK75-Streptactin, 1 µL SmartCut Buffer, 3 µL plasmid DNA, 5.5 µL H₂O

5 µL on 1% agarose gel electrophoresis

plasmid assignment was tricky because of confusion during the weekend Minipreps

Results:

pASK75-Streptactin clone 1 and 2 were not visible

verified Plasmid names are available after sequencing

Lane 1: 5 µl 1 kb Ladder

Lane 2: 5 µL Plasmid F101 K1 (seems to be pSB1C3-RFP-Generator)

Lane 3: 5 µL Plasmid F101 K2 (seems not to be pSB1C3-RFP-Generator)

Lane 4: 5 µl 100 bp Ladder

Lane 5: 5 µL P125 K1 (seems not to be pSB1C3-RFP-Generator)

Lane 6: 5 µL P125 K2 (seems to be pSB1C3-RFP-Generator)

Preperative digestion of NanoLuc + StrepTag + Poly-A (F112) and cloning behind CMV-EGFR (F107)

Investigator: Christoph, Niklas

Aim of the experiment: preperative digestion for cloning of the construct behind of CMV-EGFR

Procedure:

15 µl P115 (NanoLuc + StrepTag + Poly-A), 1 µl NgoMiV, 1 µl PstI, 3 µl CutSmart buffer, 10 µl H2O

Incubation for 2 h at 37°C

1% gel electrophoresis

Photo

gel extraction according to SOP

Ligation of 2 µl F107 (AgeI, PstI) + 8 µl F112 (NgomIV, PstI) with 2 µl Ligase buffer, 7 µl ddH₂O, 1 µl T4-Ligase for 40 minutes

CaCl₂-competent E. coli XL1-Blue cells were taken from the stock in –80 °C freezer and gently thawed on ice

7 µl of DNA was added to 100 µl of competent cells and gently mixed

30 min incubation on ice

5 min heat shock at 37 °C

Added 1 ml LB medium to each tube

Incubation for 55 min at 37 °C in the 180 rpm cell-culture shaker

60 µl of the cell suspension was plated on one chloramphenicol plate

The rest were centrifuged for 1 min at 13,000 rpm and the supernatant was dicarded

The pellet was resuspended in 60 µl of LB-medium and this concentrated cell suspension was plated again on a new chlorampenicol plate (=rescue plate).

Cloning of Nanoluc behind BAP

Investigator: Christoph, Niklas

Aim of the experiment: Cloning of Nanoluc behind BAP based (testing fast cloning strategy)

Procedure:

5 µl P78 (Nanoluc), 0.5 µl NgoMiV, 0.5 µl PstI, 1 µl CutSmart buffer, 2.5 µl H2O, 0.5 SacI = F108
4 µl P123 (pSB1C3-BAP), 0.5 µl AgeI, 0.5 µl PstI, 1 µl CutSmart buffer, 3 µl H2O, 1 µl FastAP = F109

Incubation for 2 h at 37°C, 15 min heat inactivation

Ligation: 2 µl F108 (Nanoluc) + 8 µl F109 (BAP), 2 µl buffer, 1 µl Ligase, 7 µl H2O

Transformation:

CaCl₂-competent E. coli XL1-Blue cells were taken from the stock in –80 °C freezer and gently thawed on ice

7 µl of DNA was added to 100 µl of competent cells and gently mixed

30 min incubation on ice

5 min heat shock at 37 °C

Added 1 ml LB medium to each tube

Incubation for 55 min at 37 °C in the 180 rpm cell-culture shaker

60 µl of the cell suspension was plated on one chloramphenicol plate

The rest were centrifuged for 1 min at 13,000 rpm and the supernatant was dicarded

The pellet was resuspended in 60 µl of LB-medium and this concentrated cell suspension was plated again on a new chlorampenicol plate (=rescue plate).

Gel extraction of IgKappa (F111) and cloning behind CMV in pSB1C3 (F63)

Investigator: Christoph, Niklas

Aim of the experiment: gel extraction after digestion for cloning of the construct behind of CMV

Procedure:

1% gel electrophoresis

Photo

gel extraction according to SOP

Ligation of 6.1 µl F111 ( XbaI, PstI) + 3.9 µl F63 (SpeI, PstI) with 2 µl Ligase buffer, 7 µl ddH₂O, 1 µl T4-Ligase for 40 minutes

CaCl₂-competent E. coli XL1-Blue cells were taken from the stock in –80 °C freezer and gently thawed on ice

7 µl of DNA was added to 100 µl of competent cells and gently mixed

30 min incubation on ice

5 min heat shock at 37 °C

Added 1 ml LB medium to each tube

Incubation for 55 min at 37 °C in the 180 rpm cell-culture shaker

60 µl of the cell suspension was plated on one chloramphenicol plate

The rest were centrifuged for 1 min at 13,000 rpm and the supernatant was dicarded

The pellet was resuspended in 60 µl of LB-medium and this concentrated cell suspension was plated again on a new chlorampenicol plate (=rescue plate).

Retrafo of P123 (digest. GSY3-BAP)

Investigator: Niklas

Procedure:

CaCl₂-competent E. coli XL1-Blue cells were taken from the stock in –80 °C freezer and gently thawed on ice

1 µl of DNA was added to 100 µl of competent cells and gently mixed

30 min incubation on ice

5 min heat shock at 37 °C

Added 1 ml LB medium to each tube

Incubation for 55 min at 37 °C in the 180 rpm cell-culture shaker

60 µl of the cell suspension was plated on one chloramphenicol plate

The rest were centrifuged for 1 min at 13,000 rpm and the supernatant was dicarded

The pellet was resuspended in 60 µl of LB-medium and this concentrated cell suspension was plated again on a new chlorampenicol plate (=rescue plate).

Digestion of quickchanged mRuby (without StrepTag) and transformation of E. coli XL1-Blue afterwards

Investigator: Niklas

Procedure:

the PCR-product is digested by 1 µl DpnI (cuts methylated DNA)

CaCl₂-competent E. coli XL1-Blue cells were taken from the stock in –80 °C freezer and gently thawed on ice

7 µl of DNA was added to 100 µl of competent cells and gently mixed

30 min incubation on ice

5 min heat shock at 37 °C

Added 1 ml LB medium to each tube

Incubation for 55 min at 37 °C in the 180 rpm cell-culture shaker

60 µl of the cell suspension was plated on one chloramphenicol plate

The rest were centrifuged for 1 min at 13,000 rpm and the supernatant was dicarded

The pellet was resuspended in 60 µl of LB-medium and this concentrated cell suspension was plated again on a new chlorampenicol plate (=rescue plate).

next steps: 4 Minipreps, test digestion, Sequencing

QuickChange-PCR of P100 (O23 and O23)

Investigators: Julian, Niklas

Aim of the experiment: Changing of amino acid in mRuby3

Procedure:

the batches were split, each batch contained only one primer, the batches were pooled after 15 cycles (1 µl Polymerase is added)
Annealing at 55°C

volume	reagent
1.25µl	O23/O24
0,5 µl	dNTP-mix
1 µl	1:100 P100
2.5 µl	Pfu Ultra II-buffer
0.5 µl	Pfu Ultra II Polymerase
19.25 µl	dd H₂O
4 x 25 µl	TOTAL

Repeated digestion of P75 (RFP-Generator) with HincII + dephosphorylation

Investigator: Julian

Aim of experiment: Blunt-Ligation of BirA into pSB1C3

Procedure:

Digestion of P75 (RFP-Generator) with HincII + dephosphorylation

volume	reagent
6 µl	Plasmid DNA (P75)
2 µl	CutSmart buffer (10x)
1 µl	HincII
1 µl	Fast AP (for dephosphorylation)
11 µl	ddH2O
=20 µl	TOTAL

Digestion was incubated for 2 hours at 37°C

Ligation of phosphorylated F102 (PCR of BirA) into F113 (RFP-Generator P75 digest. HincII)

Investigator: Julian

Aim of experiment: Blunt-Ligation of BirA into pSB1C3

Procedure:

The phosphorylated DNA (prepared on July 8th) was ligated into F113 (HincII-digested RFP-Generator) as follows:

volume	reagent
4,5 µl	Vector F113
5,7 µl	Insert (BirA)
2 µl	Ligase Buffer (10x)
1 µl	T4 Ligase
7 µl	ddH2O
=20 µl	TOTAL

next steps: Transformation into E.coli NEB Turbo.

Tuesday, July 12

Transformation of BirA–RFP generator ligation (F114) and Re-Transformation of P114

Investigator: Vivien

Aim: Transform NEB Turbo cells

Procedure:

Followed standard transformation protocol (SOP) using 1 μL and 10 μL of P114 and F114, respectively

Incubated at 37 °C for 1:10 h

Plated on LB Cam (50 μL + rescue)

Incubated at 37 °C (start 12:30)

Arabinose Induction Experiment: pBAD–GFP

Investigator: Vivien

Aim: Test different induction concentrations of arabinose

Procedure:

Of 30 °C o/n culture, filled 5 mL each into four 10 mL culture tubes

Induced with 0, 0.1, 1, and 10 mM final conc. of arabinose

Took 0.5 mL sample each and stored at 4 °C

Incubated 5 mL cultures at 30 °C for 4 h

Took another 0.5 mL sample each and stored at 4 °C

Picking Colonies of F101 (P69 Middle Linker – P112 A3C5)

Investigator: Vivien

Aim: Pick transformed colonies

Procedure:

Picked 3 colonies off plate with transformed cells

Let grow at 37 °C in LB Amp (start 11:50 am)

Picking Colonies of F123 (BAP)

Investigator: Vivien

Aim: Pick transformed colonies

Procedure:

Picked 2 colonies off plate with transformed cells

Let grow at 37 °C in LB Cam (start 17:00)

Verification of succesful Quickchange of P141 (pASK75 with Streptactin)

Investigator: Niklas

Procedure:

the Plasmid (5 µl) is digested by 0.5 µl NdeI (Addiition of 1 µl cut smart and 3.5 µl ddH2O)

since the quickchange should eliminate the second Nde-restriction site, there should be one band on the gel

result:

there is no band on the gel (the experiment was repeated multiple times showing the same results)

therefore new primers are designed and ordered

Refolding of Streptavidin

Investigator: Niklas

Procedure:

the sample (pelett dissolved in 6M GdmCl)was spun down (4°C, 20 mins, 18,000 rpm)

the supernatant was transferred carefully into a falcon tube and the pellet was cast away

the supernatant was added dropwise to 1 X PBS (500 ml) and stirred over night

Colony PCR of F110 (BAP+Nanoluc)

Investigator: Vivien, Niklas

Aim: Amplification

Procedure:

samples were prepared with 5 µL Q5-Mastermix, 1 µl VF2-, 1 µL VR-Primer, 2 µL ddH20

four clones were picked and added to the samples respectively

PCR- cycles according to SOP

Lane 1: 1 kb Ladder, Lane 2-5: clones 1-4, 10 µl each

Preparative digestion and gelelectrophoresis of P37 and P26

Investigator: Julian

Aim of experiment: Preparative digestion and gelelectrophoresis of P137 (BM40)and P26 (CMV)

Procedure:

Batches for analytical digestions:

P137: EcoRI and XbaI

P26: EcoRI and SpeI

volume	reagent
23/7 µl	Plasmid DNA P137/P26
19/35 µl	ddH2O P137/P26
5 µl	CutSmart buffer (10x)
1.5 µl	each enzyme(10 U/µl)
50 µl	TOTAL

Preparative gelelectrophoresis was performed at 90 V for 60 min

The whole PCR-product was applied to a 1% agorose gel. After runnig the gel two lines where visible: one at 1000Bp and one at ~500Bp.

The 600/2100 bp band (P26/P137) was cut out and purified with the Gelextraction kit according to manufacturer's protocoll. Concentration: 20.4/33.1 ng/µl. (F115/F116)

File:Muc16 P137-P26 1207.jpeg

Ligation of F115 into F116

Investigator: Julian

Aim of experiment: Ligation of F115 (CMV) into F116 (BM40 in pSB1C3)

Procedure:

volume	reagent
4,3 µl	Vector F116 (BM40 in pSB1C3)
5,7 µl	Insert F115(CMV)
2 µl	Ligase Buffer (10x)
1 µl	T4 Ligase
7 µl	ddH2O
=20 µl	TOTAL

next steps: Transformation into E.coli NEB Turbo.

Transformation of F117 (CMV in pSB1C3 with BM40), F118 (QC P100), F119 (QC P80) and P26 (CMV; Retrafo)

Investigator: Julian

Aim of the experiment: Transformation of CMV in pSB1C3 with BM40 (F117), QC P100 (F118), QC P80 (F119) and P26 in NEB Turbos(F117)/XL1 blue

Procedure: transformation in competent E. coli NEB Turbo (F117)/XL1 blue (rest) according to protocol + rescue

Result: plates (LB Cam) in incubator for further processing (37 °C)

Wednesday, July 13

QuickChange-PCR of P80 (O23 and O24)

Investigators: Christoph

Aim of the experiment: Changing of amino acid in mRuby3

Procedure:

the batches were split, each batch contained only one primer, the batches were pooled after 15 cycles (1 µl Polymerase is added)
Annealing at 55°C

volume	reagent
1.25µl	O23/O24
0,5 µl	dNTP-mix
1 µl	1:100 P80
2.5 µl	Pfu Ultra II-buffer
0.5 µl	Pfu Ultra II Polymerase
19.25 µl	dd H₂O
4 x 25 µl	TOTAL

Cycling was performed according to SOP.

MiniPrep of Middle Linker-A3C5 construct

Investigator: Christoph

Aim of the experiment: MiniPrep two colonies of Middle Linker-A3C5 construct

Procedure:

MiniPrep was performed according to manufacturer's protocol (QIAprep MiniPrep, Qiagen)
Both plasmids were sent to sequencing without analytical digestion because of the short lenght

Cloning of F120 (CMV-IgKappa) and F121 (CMV+EGFR / Nanoluc+StrepTag+PolyA)

Investigator: Christoph

Aim of the experiment: Ligations of F120 (CMV-IgKappa) and F121 (CMV+EGFR / Nanoluc+StrepTag+PolyA) and transformation

Procedure:

Ligation mixtures were prepared as following:
F120: 5 μL F63, 5 µL F111, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase
F121: 3 μL F107, 7 μL F112, 2 μL Ligase buffer, 7 μL ddH2O, 1 μL Ligase
Ligation was incubated for 30 min. at room temperature
transformation was performed according to SOP (with 100 µl cells and 20 µl ligation mix) and plating in LB+Cam agar

Thursday, July 14

MiniPreps of Overnight Cultures

Investigator: Vivien

Aim: Prep plasmid DNA of P26, F110, F117, F114, P114, and P118

Procedure:

MiniPrep performed according to manufacturer's instructions with Qiagen kit

Prior to eluting, 50 μL EB buffer was applied to the membrane, and the columns were heated at 37 °C for 7 min

Results: Plasmid DNA solutions of the following concentrations: P26 (a: 55.1 ng/μL; b: 48.1 ng/μL); F110 (K2: 150.1 ng/μL; K3: 173.0 ng/μL); F117 (a: 257.7 ng/μL; b: 159.0 ng/μL; CMV/BM40: 133.2 ng/μL); F114 (83.1 ng/μL); P114 (a: 26.1 ng/μL; 170.7 ng/μL); P118 (F118?) (a: 248.0 ng/μL; 53.2 ng/μL; 241.3 ng/μL). F110 (K2: FR12904474; K3: FR12904473) and F117 (a: FR12904477; b: FR12904476; CMV/BM40: FR12904475) were sent for sequencing with VF2.

DpnI Digest of mRuby3 QC and Transformation

Investigator: Vivien

Aim: Digest original-sequence plasmid and transform obtained pure quick-changed plasmid

Procedure:

QC was digested with DpnI (40 μL QC, 5 μL 10× CutSmart buffer, 3.5 μL ddH₂O, 1.5 μL DpnI = 50 μL) at 37 °C for 2 h

Digest (10 μL) was directly transformed into Turbo cells following SOP (including 1 h incubation time prior to plating due to chloramphenicol resistance)

Plated 50 μL on LB Cam + rescue plate

Incubated at 37 °C

Result: two plates; remaining digest stored at 4 °C in styrofoam tube rack

Friday, July 15

Inoculation of mRuby Quick change, F120 (CMV+IgKappa) and F121 (CMV+EGFR/Nanoluc+StrepTag+PolyA) preculture and miniprep

Investigator: Niklas, Clemens

Procedure:

6 colonies were picked from plate
Cells were inoculated in 5 mL LB medium (Cam 1:1000)
Fragments were minipreped following manufacturer's protocol (QiaPrep, Qiagen)
Fragments were renamed receiving a P number

Quickchange of P88 (pASK75(Streptactin)) with O-029 and O-030

Investigator: Clemens

Aim: Quickchange pASK75(Streptactin) to erase one NdeI restriction site

Procedure:

For quickchange two seperate batches were prepared:
1. batch: 0.7 µL O-029, 0.5 µL dNTP mix, 2.5 µL buffer, 0.5 µL Pfu ultra polymerase, 1.5 µL P88
2. batch: 0.7 µL O-030, 0.5 µL dNTP mix, 2.5 µL buffer, 0.5 µL Pfu ultra polymerase, 1.5 µL P88
first stage of quickchange PCR was performed as following:

Step	Temperature [°C]	Time [s]
initial Denaturation	98	30
15 cycles	98	10
	55	30
	68	5
final Extension	68	5
Hold	4	ꝏ

PCR batches were mixed and 0.5 µL pfu ultra polymerase was added
Second stage of quickchange PCR was performed as in the following:

Step	Temperature [°C]	Time [s]
initial Denaturation	98	30
35 cycles	98	10
	55	30
	68	5
final Extension	68	5
Hold	4	ꝏ

Cloning of P79 (Nanoluc) into P147 (pSB1C3(BAP))

Investigator: Clemens

Aim:

Procedure:

7 µL P79 were digested with NgOMIV and PstI
10 µL P147 were digested with AgeI and PstI
Digestion products were run on a 1% agarose gel
Both fragments could be cut from the gel
Fragments were purified by gelectraction following manufacturer's protocol (Qiagen)

Fragments were renamed:
- digest P78= F123
- digest P147= F124
9,5 µL F124 and 0.5 µL F123 were ligated following manufacturers protocol (T4 DNA ligase, Thermo scientific)
NEB Turbo were transformed with 7 µL of F125 (ligation F123+F124) following SOP
Cells were plated on CAM LB medium and placed in the incubator at 37°C

Cloning of P145 (Middle Linker +A3C5) and P146 (Middle Linker +A3C5) into F70 (Vector fragment pSB1C3)

Investigator: Niklas, Clemens

Procedure:

Ligation:
- 2,5 µL P145 and 1 µL P146 were pooled and digested with NgOMIV and SpeI for 1h at 37°C.
- Full digestion was ligated into 1 µL F70

CaCl₂-competent E. coli XL1-Blue cells were taken from the stock in –80 °C freezer and gently thawed on ice

7 µl of DNA was added to 100 µl of competent cells and gently mixed

30 min incubation on ice

5 min heat shock at 37 °C

Add 1 ml LB medium to each tube

Incubation for 55 min at 37 °C in the 180 rpm cell-culture shaker

60 µl of the cell suspension was plated on one chloramphenicol plate

The rest were centrifuged for 1 min at 13,000 rpm and the supernatant was dicarded

The pellet was resuspended in 60 µl of LB-medium and this concentrated cell suspension was plated again on a chlorampenicol plate (=rescue plate).

Test digestion of P164 (BirA blunt end ligation) (after miniprep) and P161, P162, and P163 (all QC mRuby)

Investigator: Niklas, Clemens

Aim: Test digestion to see which plasmids contain the right insert

Procedure:

150 ng of plasmid DNA were digested with EcoRI and PstI following SOP
The whole batch was applied to a 1% gel to check for cut inserts.

Results:

FOTO

Blunt end ligation seems to not have worked (P164)
P161, P162 and P163 all still carry the insert

Sequenced: P161= FR12904472 (NA)

Harvesting of Streptavidin

Investigator: Niklas

Aim of the experiment: Recombinant expression and purification of streptavidin

Procedure:

After precipitation in 70 % ammonium sulfate the soluton was spun down in the centrifuge (4°C, 11000 rpm, 40 mins)
The supernatant was discarded, and the pellet was dissolved in 2.2 M ammonium sulfate (18 mL)
the sample was spun down in the centrifuge (4°C, 15000 rpm, 30 mins)
the pellet was dissolved in 1X PBS(16 mL)
next steps: last centrifugation and dialysis against Tris/Hcl (see plan on board)

Week 10, July 18–24

Monday, July 18

Inoculation of precultures for miniprep of F125 (pSB1C3(BAP-NanoLuc)) and F122 (pSB1C3(Middlelinker-A3C5))

Investigator: Clemens

Aim of the experiment:

Miniprep, analytical digestion, analytical gel, sequencing

Procedure:

Three colonies were picked from each plate (F125, F122)
Inoculation was performed according to SOP
Cells grew for 5h
- Cells onlygrew in cultures with F125 (In cultures with F122 there was no pelet)
Miniprep was performed according to manufactrer's protocol
Samples were renamed:
- F125 K1: P168
- F125 K2: P169
- F125 K3: P170

Analytical digestion:
- Each plasmid was digested with EcoRI and PstI

volume	reagent
6 µl	Plasmid DNA P168/P169/P170
1 µl	Cutsmart (10x)
0.5 µl	EcoRI(10 U/µl)
0.5 µl	PstI (20 U/µl)
1 µl	ddH2O
=10 µl	TOTAL

Results:

Foto:

Lane 1: 1kb ladder
Lane 2: P168
Lane 3: P169
Lane 4: P170 --> right signals (2000 bp, ~600 bp(BAP-NanoLuc)

Send for sequencing:
- P170: FR12904468 (VF2)

Analytical digestion of P149 , P150 (both pSB1C3(CMV-IgKappa)), P151, P152 (both pSB1C3(CMV-EGFR-NanoLuc-StrepTag-polyA)), P153, P154 (both QC pSB1C3(mRuby3))

Investigator: Clemens

Aim of the experiment: Analytical digeston to find out if the cloning was successful

Procedure:

measure concentrations of Plasmids (see inventary list)

Analytical digestion:
- Each plasmid was digested with EcoRI and PstI

volume	reagent
3 µl	Plasmid DNA P149/ P150/ P151/ P152/ P153/ P154
1 µl	Cutsmart (10x)
0.5 µl	EcoRI(10 U/µl)
0.5 µl	PstI (20 U/µl)
5 µl	ddH2O
=10 µl	TOTAL

Results:

Foto:

Lane 1: 1kb ladder
Lane 2: P149 --> right signals (2000bp; 730bp)
Lane 3: P150 --> right signals (2000bp; 730bp)
Lane 4: P151
Lane 5: P152 --> right signals (2000bp; 1626bp)
Lane 6: P153 --> very weak signal
Lane 7: P154 --> right signals (2000bp; 700bp)

Send for sequencing:
- P150: FR12904471 (VF2)
- P152: FR12904470 (VF2)
- P154: FR12904469 (VF2)

Transformation of QC of P88 (pASK75(Streptactin))

Investigator: Clemens

Aim of the experiment:

See if quickchange has worked

Procedure:

NEB Turbo cells were transformed with 10 µl of QC P88 according to SOP
Cells were plated on LB medium (Amp) and incubated at 37°C

Digestion of P165 (pSB1C3(CMV-BM40) and cloning of F112 (Nanoluc-StrepTag-polyA) into P165

Investigator: Clemens

Aim of the experiment:

Create biobrick: CMV-BM40-Nanoluc-StrepTag-polyA

Procedure:

Preparative digestion batch was prepared as in the following:

volume	reagent
15 µl	Plasmid DNA P156
3 µl	Cutsmart (10x)
1 µl	AgeI(10 U/µl)
1 µl	PstI(20 U/µl)
10 µl	ddH2O
=30 µl	TOTAL

Digestion was seperated by gelelectrophoresis

Results:

Foto:

Lane 1: 1kb ladder
Lane 2: F126 (digest P165) --> right length

Procedure:

Fragment was cut from the gel and purified by gelextraction which was performed by manufacturer's protocol (Qiagen)

F126 was ligated with F112

Ligation batch:

volume	reagent
2 µl	Vector DNA F126
18 µl	Insert DNA F112
3 µl	T4 ligation buffer (10x)
6 µl	T4 ligase
µl	ddH2O
=30 µl	TOTAL

Ligation was incubated at 37°C for 30 min
NEB Tubros were transformed with F127 (lig. F112+F126)
Cells were plated on LB medium (Cam)

Tuesday, July 19

Inoculation of Precultures of F127 (pSB1C3(CMV-BM40-Nanoluc-StrepTag-polyA))

Investigator: Clemens

Aim: Prepare cells for miniprep of plasmids

Procedure:

six colonies were picked and inoculated in LB medium (CAM)
Plates were incubated on a shaker at 37°C

Results:

cellgrowth ?

Reamplifiying Streptactin from GSY6

Investigator: Christoph

Aim: Reamplifiying Streptactin from GSY6 for further processing in QC reaction (delete NdeI site from pASK)

Procedure:

PCR reaction was prepared according to SOP
Cycling steps were taken from the QC protocol because no further cycler was free

Results:

will be available after DpnI digestion and transformation

QuickChange-PCR of pASK75 with O29 and O30

Investigator: Christoph

Aim: Deleting NdeI from pASK (P10)

Procedure:

QC-PCR was performed according to SOP
Primers: O-029 and O-030
Annealing at 55°C
Elongation time: 5 min
2-step protocol was applied

Miniprep of E. coli Xl1-Blue P171, P172 and P173 (pSB1C3(CMV-BM40-Nanoluc-StrepTag-polyA))

Investigator: Javier

Aim of the experiment: Extracting P171, P172 and P173 (CMV-BM40-Nanoluc-StrepTag-polyA) from E.coli XL-1-blue

Procedure:

Miniprep was performed after manufacturer's protocol (QIAprep Miniprep, QIAGEN)
Concentrations:

Plasmid	c [ng/µl]
P171	75,4
P172	108,2
P173	66,4

Transformation of F136 (A3C5+Middle-Linker), F137 (EGFR+mRuby-Strep), F138 (mRuby3-Strep+PolyA) and P161 (QC mRuby-Strep)

Investigator: Javier

Aim of the experiment: Transformation of A3C5+Middle-Linker (F136), EGFR+mRuby-Strep (F137), mRuby3-Strep+PolyA (F138) and QC mRuby-Strep (P161) XL1 blue

Procedure: transformation in competent E. coli XL1 blue according to protocol + rescue

Result: plates (LB Cam) in incubator for further processing (37 °C)

Colony PCR of F127 (CMV-BM40-Nanoluc-StrepTag-polyA)

Investigator: Clemens

Aim: See if cloning was successfull

Procedure:

samples wwere prepared with 5 µL Q5-Mastermix, 1 µl VF2-, 1 µL VR-Primer, 2 µL ddH20

six clones were picked and added to the samples respectively

PCR- cycles according to SOP (Annealing-temp: 66°C; Ampflification time: 1.5min)

Results:

Lane 1: 1 kb Ladder
Lane 2: F127 K1
Lane 3: F127 K2
Lane 4: F127 K3
Lane 5: F127 K4
Lane 6: F127 K5
Lane 7: F127 K6

500px

Preparative digestion of P161 (pSB1C3(mRuby3-StrepTag)), P73 (pSB1C3((PolyA)), P96 ((pSB1C3(EGFR-TMD)), P69 (pSB1C3(Middle-linker)) and P112 (pSB1C3(A3C5))

Investigator: Clemens, Christoph, Javier

Aim: Create biobricks

Procedure:

Preparative digestion of P161 and P73

volume	reagent
15 µl/ 20 µl	Plasmid DNA P161/ P73
3 µl/ 3 µl	Cutsmart (10x)
1 µl/ 1 µl	EcoRI/ EcoRI
1 µl/ 1 µl	SpeI/ XbaI
10 µl/ 5 µl	ddH2O/ ddH2O
=30 µl	TOTAL

Preparative digestion of P96 and P161

volume	reagent
10 µl/ 15 µl	Plasmid DNA P96/ P161
3 µl/ 3 µl	Cutsmart (10x)
1 µl/ 1 µl	PstI/ PstI
1 µl/ 1 µl	AgeI/ NgOMIV
15 µl/ 10 µl	ddH2O/ ddH2O
=30 µl	TOTAL

Preparative digestion of P69 and P112

volume	reagent
20 µl/ 15 µl	Plasmid DNA P69/ P112
3 µl/ 3 µl	Cutsmart (10x)
1 µl/ 1 µl	EcoRI/ EcoRI
1 µl/ 1 µl	AgeI/ NgOMIV
5 µl/ 10 µl	ddH2O/ ddH2O
=30 µl	TOTAL

Digestions were incubated at 37°C for 2h
Samples were applied to a 1% agarose gel (40 min; 90V)
Samples were cut from the gel afterwards:
Renamed:
- digest P69: F128
- digest P112: F129
- digest P161: F130
- digest P96: F131
- digest P161: F132
- digest P73: F133

Results:

Fotos

Procedure:

Gelextraction was performed after manufacturers protocol (Qiagen)
After gelextraction concentrations were measured:

Ligation:

volume	reagent
xx µl	Vektor F129
xx µl	Insert F128
2 µl	10X DNA-Ligase-buffer
1 µl	T4-Ligase
x µl	ddH₂O
=20 µl	TOTAL

volume	reagent
xx µl	Vektor F131
7xx µl	Insert F130
2 µl	10X DNA-Ligase-buffer
1 µl	T4-Ligase
x µl	ddH₂O
=20 µl	TOTAL

volume	reagent
xx µl	Vektor F133
7xx µl	Insert F132
2 µl	10X DNA-Ligase-buffer
1 µl	T4-Ligase
x µl	ddH₂O
=20 µl	TOTAL

Ligation was performed according to SOP
Xl1 blue cells were transformed with the Ligations according to SOP

Wednesday, July 20

Analytical digestion and gelelectrophoresis of P171-P173 & QC of P10

Investigator: JB, MT

Aim of experiment: Check if everything is fine.

Procedure:

Digest P171-P173 with XbaI + SpeI and QC of P10 with NedI and incubate 1 h at 37 °C
Run 1 % agarose-gel at least 40 min at 100 V

Results:

Lane1: 1Kb ladder; Lane2: P171; Lane3: P172; Lane4: P173; Lane5: QC of P10

=> P171 was sent for sequencing: FR12904466 => NdeI test digestion shows two signals although there should have been just one

Preparation of GSY 6; F134; F135 for ligation

Investigator: JB, MT

Aim of experiment: Prepare GSY6 for Ligation.

Procedure:

Digestion of GSY6 with SpeI + HindIII
Preparative 1 % Agarose gel 100 V for at least 40 min.
Gel extraction of GSY6, F134, F135 by Quiagen kit.

Results:

GSY6 -> F139 : 2.5 ng/µL
F134 : 4 ng/µL
F135 : 10.2 ng/µL

Preparative agarose gel GSY6:

Ligation & transformation of F134 + F63; F135 + F139

Investigator: JB, MT

Aim of experiment: Ligation & transformation of F134 + F63; F135 + F139

Procedure:

Ligation following SOP(13.02.2013)

F134 + F63 -> F140
F135 + F139 -> F141

transformation following SOP(13.02.2013)

F140 on CAM
F141 on AMP

Results:

  We will see tomorrow, please update this section.

Thursday, July 21

Miniprep of F136 (K1 & K2) (pSB1C3(Middle linker-A3C5)), F137 (K1 & K2) (pSB1C3(EGFR TMD-mRuby3-StepTag)), F138 (K1 & K2) (pSB1C3(mRuby3-StrepTag-polyA) and retrafo of P161 (pSB1C3(mRuby3-StrepTag))

Investigator: Clemens

Aim of experiment: Get plasmids for analytical digestion and sequencing

Procedure:

Minipreps were performed according to manufacturers protocol (Qiagen, QiaPrep)
Samples were renamed afterwards:
- F136 K1: P174
- F136 K2: P175
- F137 K1: P176
- F137 K2: P177
- F138 K1: P178
- F138 K2: P179
- retrafo of P161: P180

Analytical digestion:

volume	reagent
1 µl	Plasmid DNA
1 µl	Cutsmart (10x)
0.5 µl	EcoRI
0.5 µl	PstI
7 µl	ddH2O
=10 µl	TOTAL

Ligation was renamed: F143
Digestion products were seperated via gelelectrophoresis

Results:

Foto:

All plasmids seemed to carry the appropriate insert

Sequencing:

- P175: FR12904465 (VF2)
- P177: FR12904464 (VF2)
- P178: FR12904463 (VF2)

Preparative digestion of P116 (pSB1C3(IgKappa))

Investigator: Clemens, Christoph

Aim of experiment: cloning of CMV in front of IgKappa signal peptide

Procedure:

preparative digestion batch

volume	reagent
10 µl	Plasmid DNA P116
3 µl	Cutsmart (10x)
1 µl	EcoRI
1 µl	XbaI
15 µl	ddH2O
=30 µl	TOTAL

Digestion was applied to a 1% agarose gel (45 min; 90V)
Sample was cut from the gel and gelextraction was performed according to manufacturers protocol

Ligation of Fx and F115 (digest CMV promotor):

Ligation:

volume	reagent
3.9 µl	Vektor F142
6.1 µl	Insert F115
2 µl	10X DNA-Ligase-buffer
1 µl	T4-Ligase
20 µl	ddH₂O
=20 µl	TOTAL

Transformation of XL1blue was performed according to SOP
Cells were plated on LB medium (CAM) and incubated over night at 37°C

Friday, July 22

Analytical digestion of pASK_T7 RBS_LCN2_His

Investigator: Luisa

Aim of the experiment: Analytical digestion to find out whether there is more than one NdeI restriction site.

Procedure:

Analytical digestion:
- The plasmid was digested with NdeI and HindIII

volume	reagent
3 µl	Plasmid DNA
1 µl	Cutsmart (10x)
0.5 µl	NdeI
0.5 µl	HindIII
5 µl	ddH2O
=10 µl	TOTAL

Results:

Two bands were visible what means that there is only one NdeI restriction site.

Inoculation of Precultures of F143 (pSB1C3(CMV+IgKappa))

Investigator: Luisa

Aim: Prepare cells for miniprep of plasmids

Procedure:

two colonies were picked and inoculated in LB medium (CAM)
Plates were incubated on a shaker at 37°C over night.

Harvesting of Streptavidin

Investigator: Niklas

Aim of the experiment: Recombinant expression and purification of streptavidin

Procedure:

the soluton was spun down in the centrifuge (4°C, 15000 rpm, 20 mins) to remove last contamination
The pellet was discarded and the supernantant was dialysed against 20 mM Tris/HCl (ph 8) witt 50 mM NaCl
last step to do: steril filtration

the concentration was determined via UV/VIS: the absorption at 280 nm is 0.469 (1:100 dilution), this equals a concentration of 62 mg/mL (about 16 mL) (mass 54 kDa; Absorbtion coefficient 40455 1/M*cm

Sequencing of P174(Middle Linker + A3C5)

Investigator: Niklas

Procedure:

Sequencing batch were prepared after manufacturer's protocol. (15 µl of plasmid DNA (50 - 100 ng) and 2 µl sequencing primer)

Cloning of P178 (mRubyStrepPolyA) / P180 (mRubyStrep) behind EGFR-TMD in pSB1C3 (P96)

Investigator: Niklas

Procedure:

Preparative digestion:
The Inserts were digested with PstI and NgoMIV

volume	reagent
7.7 / 8.2 µl (about 3µg)	Plasmid DNA
2 µl	Cutsmart (10x)
1 µl	PstI
1 µl	NgoMIV
8.3 / 7.8 µl	ddH2O
=20 µl	TOTAL

both fragments were ligated with F131 (digest P96 [AgeI; PstI])

CaCl2 competent E. coli XL1-Blue cells were taken out of stock in -80 °C freezer and were gently thawed on ice.

7 µl of DNA was added to 100 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 750 µl LB-medium to each tube.

Incubation for 1 hour at 37 °C

The cell suspension was plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C in the cell-culture shaker.

Results: Cloning didn't work. No colonies on plate. Repeat.

Cloning of Middle Linker before A3C5 in pSB1C3 (Repeat)

Investigator: Julian, Niklas

Procedure:

Preparative digestion:
- The Middle Linker (P69) was digested with EcoRI and AgeI

volume	reagent
30 µl	Plasmid DNA
5 µl	Cutsmart (10x)
1.5 µl	EcoRI
1.5 µl	AgeI
12 µl	ddH2O
=50 µl	TOTAL

the fragment was ligated with F129(digest P112 [EcoRI; NgOMIV])

CaCl2 competent E. coli XL1-Blue cells were taken out of stock in -80 °C freezer and were gently thawed on ice.

7 µl of DNA was added to 100 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 750 µl LB-medium to each tube.

Incubation for 1 hour at 37 °C

The cell suspension was plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C in the cell-culture shaker.

Week 11, July 25th - July 31st

Monday, July 25

Inoculation of Precultures of F143 (pSB1C3(CMV+IgKappa)), F141new (pASK(Streptactin)), F151 (pSB1C3(middleLinker+A3C5), pASK75_T7-RBS-LCN2-His, F148 (pSB1C3(mRubyStrepPolyA+ CMV-EGFR Signal-Pept)

Investigator: Luisa

Aim: Prepare cells for miniprep of plasmids

Procedure:

Three colonies of each were picked and inoculated in LB medium (CAM) respectively (AMP) fpr pASK.
Plates were incubated on a shaker at 37°C for 6 hours.

MiniPreps and analytical digestion of F143 cultures

Investigator: Luisa

Aim: Prep plasmid DNA of F143 (pSB1C3(CMV + IgKappa)) and checking wheather ligation was successful.

Procedure:

MiniPrep performed according to manufacturer's instructions with Qiagen kit

Prior to eluting, 30 μL EB buffer was applied to the membrane since the pellet was quite small, and the columns were heated at 37 °C for 7 min

Results:

Concentrations: K1 = 230,4ng/µl, K2 = 162,4 ng/µl

Analytical Digestion:

An 20µl batch was prepared for analytical digestion for each of the two clones:

volume	reagent
10 µl	Plasmid DNA
2 µl	Cutsmart (10x)
1 µl	EcoI
1 µl	PstI
6 µl	ddH2O
=20 µl	TOTAL

Results:

Two bands were visible at 750 Bp which is the size of IgKappa and CMV together. Cloning was successful. Sequence still has to be ckecked though.

Cloning of P178 (mRubyStrepPolyA) / P180 (mRubyStrep) behind EGFR-TMD in pSB1C3 (P96). Repetition.

Investigator: Luisa

Aim: See title.

Procedure:

Digestion of P178 and P180: 7µg of DNA were digested.

volume	reagent
18 µl	Plasmid DNA
5 µl	Cutsmart (10x)
2,5 µl	NgoMIV
2,5 µl	PstI
22 µl	ddH2O
=50 µl	TOTAL

Digestion at 37°C for 2,5h.

Cloning of NanoLuc-Strep-PolyA (F112) behind CMV-IgKappa in pSB1C3 (P181).

Investigator: Luisa

Aim: See title.

Procedure:

Digestion of P181:

volume	reagent
10 µl	Plasmid DNA
5 µl	Cutsmart (10x)
2,5 µl	AgeI (20u/µl)
2,5 µl	PstI (20u/µl)
30 µl	ddH2O
=50 µl	TOTAL

Digestion at 37°C for 2,5h.

Digestion and gel-extraction of P178; P180

Investigator: MT

Aim of experiment: Preparation of P178 and P180 for ligation.

Procedure:

Digest P178; P180 with NgoMIV + PstI incubate 1 h at 37 °C
Run 1 % agarose-gel at least 40 min at 100 V
Gel extraction by Quiagen kit.

Results:

P178 [NgoMIV +PstI digest] -> F152: 17 ng/µL
P180 [NgoMIV +PstI digest] -> F153: 8.1 ng/µL

Ligation & transformation of F131 + F152; F131 + F153

Investigator: MT

Aim of experiment: Ligation & transformation of F131 + F152; F131 + F153

Procedure:

Ligation following SOP(13.02.2013)

F131 + F152 -> F154
F131 + F153 -> F155

Transformation following SOP(13.02.2013)

F154 E. coli. turbo CAM
F155 E. coli. turbo CAM

Results:

  We will see tomorrow, please update this section.

Wednesday, July 27th

Minipreps of EGFR-TMD - mRuby - Strep - PolyA (F131+F152) and EGFR-TMD - mRuby - Strep (F131+F153)

Investigator: JB

Results: Procedure according to protocol (spin kit). Resulting plasmids:

EGFR-TMD - mRuby - Strep - PolyA (F131+F152) -> P196, P197 EGFR-TMD - mRuby - Strep (F131+F153) -> P198, P199

Concentrations: P196: 228 ng/µl P197: 212 ng/µl P198: 197 ng/µl P199: 322 ng/µl

Thursday, July 28th

Inoculation of Precultures of F141new (pASK(Streptactin))

Investigator: Luisa

Aim: Prepare cells for miniprep of plasmids

Procedure:

Three colonies of each were picked and inoculated in LB medium (CAM) respectively (AMP) fpr pASK.
Plates were incubated on a shaker at 37°C for 6 hours.

PCR of GSY6

Investigator: Luisa

Aim: Amplification of Streptavidin mutant and Traptactin for further cloning into pASK.

Procedure:

reaction was performed after SOP (PCR Using Q5® High-Fidelity DNA Polymerase, NEB)
2ng Plasmid were used for amplification (1 µL)
Primers: VR and VF2

PCR program (standard):

Step	Temperature [°C]	Time [s]
initial Denaturation	98	30
35 cycles	98	10
	66	30
	72	90
final Extension	72	5
Hold	4	ꝏ

PCR product was purified accoding to manufacturer's protocol (PCR puification kit, Qiagen)
DNA was eluted 40 µL EB buffer

Digestion of pASK

Investigator: Luisa

Aim: Preparing pASK for ligation with Streptavidin mutant and Traptactin.

Procedure:

volume	reagent
20 µl	Plasmid DNA
5 µl	Cutsmart (10x)
1,5 µl	NdeI
1,5 µl	HindIII
22 µl	ddH2O
=50 µl	TOTAL

Cloning of Traptactin and Streptavidin mutant into pASK (P191).

Investigator: Luisa

Aim: Preperation of the plasmids for Streptavidin and Traptactin expression in E.coli.

Procedure:

Cutting out the crucial bands from the gel containing the PCR-product and the digested plasmid (P190) and purifiing them with the Gelextraction Kit according to the protocoll. First Gel failed: Very small band with wrong length...--> Repetition of digestion with P190.

The PCR product of GSY6 was extracted from the gel (Band at ~800 Bp) with the Gelextraction Kit and then digested with NdeI and HindIII to get the fragments Streptavidin m1 and Traptactin. Inactivation was performed at 80°C for 10 min.

Concentrations: 33,9ng/µl (GSY6),

Ligation...

Cloning of NanoLuc-Strep-PolyA (F112) behind CMV-IgKappa in pSB1C3 (P182). Repetition.

Investigator: JB

Aim: See title.

Procedure:

Digestion of P182:

volume	reagent
15 µl	Plasmid DNA
3 µl	Cutsmart (10x)
1,5 µl	AgeI (20u/µl)
1,5 µl	PstI (20u/µl)
9 µl	ddH2O
=30 µl	TOTAL

Digestion at 37°C for 2.5h.
Take care: P182 is not sequenced

Retrafos of P178 (mRuby-Strep-PolyA) and P181 (CMV + IgKappa)

Investigator: JB

Results: Transformation according to protocol, plates were incubated at 37°C overnight.

Dialysis of eGFP

Investigator: Julian

Aim of the experiment: Preparation of eGFP for following biotinylation

Procedure:

eGFP was poured in a dialysis hose (cut-off 14 kDa)
The hose was then placed in 4 L ice cold borate buffer 50 mM pH 8.85 (no salt)
The dialysis took place at 4°C over night

Sequencing of P160 (NanoLuc+StrepTag+Poly-A)

Investigator: Julian

Procedure:

Sequencing batch were prepared after manufacturer's protocol. (15 µl of plasmid DNA (50 - 100 ng) and 2 µl sequencing primer)

Friday, July 29th

Minipreps of EGFR-TMD - mRuby - Strep - PolyA (F131+F152) and EGFR-TMD - mRuby - Strep (F131+F153)

Investigator: Julian

Procedure:

Procedure according to protocol (spin kit). Resulting plasmids:

CMV+EGFR-SigPep+mRuby3+StrepT+PolyA (F131+F152) -> P200, P201 pASK_T7 RBS_LCN2_His (Vorlage für gewünschte Inserts) -> P202, P203

Results:

Concentrations: P196: 385.3 ng/µl P197: 462.6 ng/µl P198: 84.8 ng/µl P199: 96.0 ng/µl

Send for sequencing:
- P201: FR12904454 (VF2)

Analytical digestion of P202 and P203 (pASK_T7 RBS_LCN2_His)

Investigator: Julian

Aim of the experiment: Controll whether there is more than one NdeI restriction site.

Procedure:

Analytical digestion:
- The plasmid was digested with NdeI and HindIII

volume	reagent
2 µl	Plasmid DNA
1 µl	CutSmart buffer
0.5 µl	NdeI
0.5 µl	HindIII
6 µl	ddH2O
=10 µl	TOTAL

Results:

Two bands were visible what means that there is only one NdeI restriction site.

Chemical biotinylation of BSA and eGFP

Investigator: Julian

Procedure:

1 g BSA was chemically biotinylated with a 40x molar excess of biotin-NHS-ester:

100 ml of 50 mM borate buffer with 50 mM NaCl pH 8.85

dissolve BSA (10 mg/ml)

add adequate amount of biotin-NHS-ester: 205 mg

reaction for approx. 45 minutes at RT after full dissolving of biotin-NHS-ester

store at 4 °C

eGFP was chemically biotinylated with a 16x (error in calculations) molar excess of biotin-NHS-ester:

eGFP in 75 ml of 50 mM borate buffer without NaCl pH 8.85

1to10 dilution: extinction(280) = 0.371

add adequate amount of biotin-NHS-ester: 69 mg

reaction for approx. 45 minutes at RT after full dissolving of biotin-NHS-ester

store at 4 °C

Next Steps

add another 104 mg of biotin-NHS-ester incl. reaction at RT tp reach desired 40X molar excess
Purification via column chromatography

Week 12, August 1st - August 7th

Monday, August 01

Cloning of Streptavidin/Streptactin/Traptactin from GSY5 and GSY6 into pASK75 + Transformation

Investigator: JB

PCR products from GSY5 and GSY6 were, after digestion overnight with Nde1, loaded on an 1.8% agarose gel. The fragment bands at roughly 350 bps were extracted.

Digested pASK75 (P202 and P203 dig. with Nde1) were loaded onto an 1% agarose gel, the vector fragments at 3800 bp isolated and purified.

Vector fragment plus Streptavidin fragments were ligated and transformed into XL-1 blue

-> F159+F160, F159+F161

Cloning of EGFR-TMD - mRuby - Strep with IRES-BirA

Investigator: JB

2 µg of P77 (EcoRI, XbaI) and P199 (EcoRI, SpeI) were digested for 2 hours at 37°C
Digestions were separated on a 1% agarose gel, fragments corresponding to the vector (P77) and to the to be cloned insert (P199) were isolated and purified
Ligation of inserts for 30 mins at RT
Transformation of ligation into XL1-blue

Retrafos of cell culture constructs for signal peptide testing for midipreps

Investigator: JB

Retransformation of all constructs in XL1-blue
Constructs concerned are: P152, P171, P205 (Nanoluc-constructs) and P201, P208 and P211 (mRuby-constructs)
Transformation according to protocol, plates incubated at 37°C overnight

Tuesday, August 02

Wednesday, August 03

Verification of cloning P210 (CMV-IgKappa-Nanoluc-StrepTag-PolyA)

Investigator: Niklas

Aim of the experiment: Verification of successful cloning after sequencing showed that the last part of the construct might be missing

Procedure:

digestion with AgeI and PstI (sample was digested with EcoRI and PstI for 10 minutes, than inactivated an ligated)

Results:

the gel shows a band at about 3500 bp (pSB1C3 + full insert)
gel shows additionally a band below 750 bp (CMV+ IgKappa)
the sample contains the full insert as well as the small insert (CMV+IgKappa without Nanoluc-StrepTag-PolyA)
cloning not succesful
the construct was inocculated from plate again

Transformation of E. coli XL1 blue with Ligations F159 + F160 and F159 + F161 (pASK + streptavidin from GSY 5 and 6)

Investigator: Niklas

Aim of the experiment: Transformation of E. coli XL1 blue.

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

7 µl of DNA was added to 100 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 950 µl LB-medium to each tube.

The cell suspension was plated on ampicillin plates (inclusive rescue plate) and incubated over night at 37 °C in the incubator.

Thursday, August 04

MidiPrep P152 and P171 (pSB1C3)

Investigator: EF

Aim of the experiment: isolate Plasmids

Procedure:

MidiPrep was performed according to manufacturer's protocol (QIAprep MidiPrep, Qiagen). After washing the DNA with 70% Ethanol the pellet was left in special centrifugation tubes (labeled 152+QF; 171+QF) in order to air-dry. EB buffer for storage was later added by CG.
Conc: 1000 ng/ul

Cloning of BAP Nanoluc (P206) before A3C5 (P213)

Investigator: NA

Procedure:

Preparative digestion:

P213 (A3C5): EcoRI and NgoMIV -> F170

P206 (BAP Nanoluc): EcoRI and AgeI -> F171

Both fragments were ligated after gelextraction.

CaCl2 competent E. coli XL1-Blue cells were taken out of stock in -80 °C freezer and were gently thawed on ice.

7 µl of Ligation was added to 100 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 750 µl LB-medium to each tube.

Incubation for 1 hour at 37 °C

The cell suspension was plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C in the cell-culture shaker.

results: Gelextraction:

the plates showed no colonies. repeat

Friday, August 05

Verification of successful cloning of all Streptavidin variants into pASK75

Investigator: CG

Aim of the experiment: Minipreps von pASK75 Streptavidin variants (codon optimzied Streptavidin, Streptactin, Traptactin)

Procedure:

MiniPrep was performed according to the manufacturer's protocol (QIAprep MiniPrep, Qiagen) for 3 clones of GSY5 and 6 clones of GSY6

Analytic digestion with 0.25 µL NdeI, 0.25 µL HindII, 1 µL SmartCut Buffer, 200 ng plasmid DNA, H₂O to 20 µl

10 µL on 1% agarose gel electrophoresis

Results: Successful cloning was verified for all plasmids by analytical digestion. Expected and observed fragment size for the vector was 3.1 kb and about 350 bp for the inserts. 4 plasmids were sent for sequencing (1x GSY5, 3x GSY6). Alle sequences were error-free. Therefore all 3 Streptavidin variants are available now.

Transformation of: Streptavidin variants, PAS-Plasmid, Interlab-Plasmids, Ligation of EGFR-TMD-mRuby-Stre-IRES-BirA and Ligation of BAP-Nanoluc-A3C5

Investigator: CG

Aim of the experiment: Transformation of Streptavidin variants, PAS-Plasmid, Interlab-Plasmids into E. coli BL21 and Ligation of EGFR-TMD-mRuby-Stre-IRES-BirA, Ligation of BAP-Nanoluc-A3C5 in E. coli XL1 blue

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

7 µl of Ligations mixes were added to 50 µl of competent cells and gently mixed, 1 µl for ccc Plasmids

30 min incubation on ice

1 min. heat shock at 42 °C

Adding of 950 µl LB-medium to each tube, and incubation for 1 h at 37°C

The cell suspension was plated on ampicillin plates (inclusive rescue plate) / CamR- plates and incubated for 7 h at 37 °C in the programmed incubator.

Ligation of EGFR-TMD-mRuby-Stre-IRES-BirA and Ligation of BAP-Nanoluc-A3C5

Investigator: CG

Aim of the experiment: Re-Ligation of EGFR-TMD-mRuby-Stre-IRES-BirA, Re-Ligation of BAP-Nanoluc-A3C5

Procedure:

The corresponding Fragments were mixed with 2 µl Ligase-buffer, 1 µl T4-Ligase and filled with water up to 20 µl

7.3 µl F163 + 2.7 µl F162 (=F173)

3.7 µl F170 + 6.3 µl F171 (=F174)

The Ligation mixes were incubated for 1 h at room temperature.

SDS Page of Streptavidin production

Investigator: CG

Aim of the experiment: Verification of successful Streptavidin production and preperation for the data package

Procedure: Streptavidin samples from the production process were further processed with SDS buffer. Some samples had very few volume, therefore the overall volume was reduced. For informations on the samples content please refer to NA. The low volume might be a problem due to evaporation issues.

Sample 1: the tube was empty
Sample 2: 1 µl sample was mixed with 7 µl water and 2 µl SDS buffer
Sample 3: 80 µl sample was mixed with 20 µl SDS buffer
Sample 4: 80 µl sample was mixed with 20 µl SDS buffer
Sample 5: 20 µl sample was mixed with 5 µl SDS buffer
Sample 6: 80 µl sample was mixed with 20 µl SDS buffer
Sample 7: 80 µl sample was mixed with 20 µl SDS buffer
Sample 8: 80 µl sample was mixed with 20 µl SDS buffer
Sample 9: 80 µl sample was mixed with 20 µl SDS buffer

10 µl of each sample were loaded on the pre-mixed SDS gel.

Gel 1: 8 µl Ladder, samples 1-6

Gel 2: 8 µl Ladder, samples 7-9, 5 µl of samples 7-9

The gel ran at 160 V for about 1 1/2 h. Afterwards it was incubated for 30 min. in staining solution, 10 min. in destaining solution 1 and over the weekend in destaining solution 2.

Results:

Week 13, August 8th - August 14th

Monday, August 08

PCR, Purification and digestion of BirA

Investigator: LK

Aim of the experiment: Amplification of BirA

Procedure:

PCR according to the SOP (primers: O17 and O18, Annealing at 62°C)
PCR purification via the purification kit according to the manufacturer's protocol
preparative digestion with XbaI and PstI over night in a 50µl batch

Results:'

Concentration after PCR-purification: 116ng/µl
Gel: One thick band at ~1000Bp --> BirA and one at ~2100Bp --> vector, we're cut out and purified via the Gelextraction kit according to the manufacturer's protocoll.
Concentrations: BirA (F186) : 62,5 ng/µl, pSB1C3 (F187): 32,5 ng/µl

Determination of Streptavidin concentration

Investigator: NA

Procedure:

OD280 measurement with quartz cuvette

result: the 1:100 dilution showed an OD of 0,469

Calculation with extinction coefficient (expasy tool) of 41940 M ^-1 * cm ^-1 and 13.3 kDA as molar mass of streptavidin monomer provides concentration below:

14.87 mg/mL

Inocculation of Streptavidin (wild type, P235) in M9 medium for fermentation

Investigator: NA

Procedure:

M9 medium with Amp (1:1000) is inocculated with preculture (~50 mL) of P235

the culture is incubated in the shaker over night at 37°C

Seeding of HEK293T cells in cell culture

Investigator: JB

Aim of experiment:

Thawing and seeeding of HEK293T cells for experiments later this week

Procedure:

Tube with cells was thawed quickly in a 37°C waterbath

After bringing most of the cell suspension in a fluid state, the suspension was transferred into a 50 ml Falcon tube and suspended in 50 ml of RPMI1640 medium (with 10% CFS and Pen/Strep added).

Cells were spun down for 2 mins at 2,300 rcf and the pellet resuspended in 20 ml of medium in order to remove residual DSMO from the cells (DSMO having been used for freezing the cells).

The resuspended cells were transferred into a culture flask and incubated overnight at 37°C/5% CO².

Cloning of IgKappa signale peptide, PAS-Lysin and further constructs for the receptor

Investigator: CG

Aim of experiment:

Cloning of CMV-IgKappa+Nanoluc-Strep-PolyA, BAP-Nanoluc+A3C5, IRES-BirA + polyA and Sumo-PAS-Lysin into pASK75

Procedure:

Digestion of 3 µg of each plasmid in 30 µl mix:

20 µl P205 (CMV-IgKappa) with EcoRI, AgeI -> Gel 1, left lane, expected fragment at about 600 bp -> F175
15 µl P160 (Nanoluc-Strep-PolyA) with EcoRI, NgoMiV -> Gel 1, right lane, expected fragment at about 3000 bp -> F176
20 µl P212 (A3C5) with EcoRI, NgoMiV -> Gel 2, left lane, expected fragment at about 2.200 bp -> F177
10 µl P206 (BAP-Nanoluc) with EcoRI, AgeI -> Gel 2, right lane, expected fragment at about 500 bp -> F178
10 µl P199 (EGFR-TMD-mRuby-Strep) with EcoRI, SpeI -> Gel 3, left lane, expected fragment at about 1.500 bp -> F179
20 µl P236 (PAS-Lysin-Sumo) with NdeI, HindIII -> Gel 3, right lane, expected fragment at about 1.000 bp -> F180
10 µl P77 (IRES-BirA-KDEL) with EcoRI, SpeI -> Gel 4, left lane, expected fragment at about 1000 bp -> F181

Ligation in 20 µl mix (s. above fragment names):

F182: 2.9 µl F176 + 7.1 µl F175
F183: 5.2 F177 + 4.8. F178
F184: 7.0 µl F159 + 3.0 µl F180
F185: 2.9 µl F133 + 7.1 µl F181

Transformation according to SOP.

Results:

For all ligations colonies grew the next day.

Gel 1:

Gel 2:

Gel 3:

Gel 4:

Tuesday, August 09

Transformation of Biobricks in NEB Turbo

Investigator: Julian

Aim of the experiment: Acquisition of pBAD/AraC and Lox site

Procedure:

resuspend DNA with 10 µl ddH2O in well of interest (standard distribution kit)
incubate for 5 min
transformation of 1 µl plasmid according to SOP in NEB Turbo

Used bricks: BBa_I0500 and BBa_J61046

Inoculation and induction of AraC+pBAD controlled eGFP production in E.coli BL-21

Investigator: LK

Aim of the experiment: Confirmation of arabinose dependend activation of the pBAD-promotor in AraC-Operon.

Procedure:

E.coli Bl-21 with P61 (PC+AraC+pBAD+eGFP in pSB1C3) we're picked and a 4ml preculture (LB+cam) was inoculated and incubated for 6h.
According to the following table 50ml cultures (LB+cam) we're incoculated with 500µl of the preculture and incubated over night at 37°C.

Arabinose concentration:

negative control

100mM

10mM

1mM

100µM

10µM

Results:

Cloning of F186 (BirA) into F187 (pSB1C3)

Investigator: LK

Aim of the experiment: Getting the BirA for the prokaryotic receptor.

Procedure:

1,7µl of F187 and 6,3µl of F186 we're ligated for 1h at RT accoridng to the SOP. --> F189
The ligation-batch was transformed into NEB-Turbo cells and plated out on cam-plates. Incubation at 37° o/n.

Inoculation of precultures from Ligations F182-F185

Investigator: LK

Aim of the experiment: Getting plamids of CMV-IgKappa+Nanoluc-Strep-PolyA (F182), BAP-Nanoluc+A3C5 (F183),Sumo-PAS-Lysin (F184) and IRES-BirA + polyA (F185)

Procedure:

Inoculation of 4mL cultures (LB cam resp. amp (F184)). Incubation at 37°C o/n.

Inocculation of fermenter

Investigator: NA

Aim of the experiment: streptavidin production

Procedure:

centrifuge preculture (P235 in M9 medium)
resuspend pellet in HCDF medium and inocculate fermenter (HCDF medium)
pO₂= 60 %; Temp= 30°C, pH~7
growth over night

SDS Page of Streptavidin production

Investigator: NA

Aim of the experiment: Verification of successful Streptavidin production and preperation for the data package

Procedure: Streptavidin samples from the production process were further processed with SDS buffer. Some samples had very few volume, therefore the overall volume was reduced.

1: 8 µl Ladder
2: 10 µl after induction (1 µl sample was mixed with 7 µl water and 2 µl SDS buffer)
3: 5 µl supernantant after denaturation (20 µl sample was mixed with 20 µl H₂O and 10 µl SDS buffer)
4: 5 µl before precipitation(80 µl sample was mixed with 20 µl SDS buffer)
5: 10 µl supernantant after 40% precipitation (80 µl sample was mixed with 20 µl SDS buffer)
6: 10 µl supernantant after 70% precipitation (80 µl sample was mixed with 20 µl SDS buffer)
7: 10 µl after dissolving in 2.2M (NH₄)2SO₄ (80 µl sample was mixed with 20 µl SDS buffer)

The gel ran at 145 V

Results:

Transformation of F192 and P238

Investigator: NA

Procedure:

CaCl2 competent E. coli XL1-Blue cells were put out from the stock in -80 °C freezer and were gently thawed on ice.

7 µl of DNA was added to 50 µl of competent cells and gently mixed.

30 min incubation on ice

5 min. heat shock at 37 °C

Adding of 950 µl LB-medium to each tube.

The cell suspensions were plated on Cam-plates (inclusive rescue plate) and incubated over night at 37 °C.

Wednesday, August 10

Minipreps and analytical digestion of P237 - P243

Investigator: LK

Aim of the experiment: Isolating and verifiing plamids of CMV-IgKappa+Nanoluc-Strep-PolyA (F182), BAP-Nanoluc+A3C5 (F183),Sumo-PAS-Lysin (F184) and IRES-BirA + polyA (F185)

Procedure:

Minipreps were performed according to the manufacturer's protocol.
~200- 500ng of ach Plasmid (accept P241) were digested with EcoI and PstI for 45 min. and a gel-elctrophoresis (1% Agarose) of the digestion-batches was performed.

Results:

* P237: expected band for CMV-IgKappa+Nanoluc-Strep-PolyA at ~1850 Bp , but unexpected band at ~1100. Discard sample? 
* P238: expected band for CMV-IgKappa+Nanoluc-Strep-PolyA at ~1850 Bp 
* P239 and P240: expected band at ~650 Bp 
* P242 and P243: bands at ~2000 Bp. Digested vector and Fragment are not distinguishable --> sequencing

Cloning constructs for the eukaryotic and prokaryotic receptor

Investigator: CG

Aim of experiment:

Cloning of EGFR-TMD-mRuby-Strep-IRES-BirA-KDEL-PolyA, BAP-Nanoluc-A3C5-EspP-2xTerm

Procedure:

Digestion of 3 µg of each plasmid in 30 µl mix:

6 µl P242 (IRES-BirA-KDEL-PolyA) with EcoRI, XbaI -> Gel 1, left lane, expected fragment at about 4000 bp -> F190
20 µl P108 (EspP-Termin.) with EcoRI, NgoMiV -> Gel 1, right lane, expected fragment at about 3000 bp -> F191

Ligation in 20 µl mix (s. fragment names above):

F192: 4 µl F190 + 6 µl F179

Transformation according to SOP.

Results:

Gel 1:

Transformation of P22; P67; P122; P137; P160

Investigator: MT

Aim of the experiment:

Amplification of P22; P67; P122; P137; P160

#	Plasmid	Description
P22	K157001	RFP-Gen.(Retrafo P4)
P67	pSB1C3	EGFR signal peptide (transloc. pore)
P122	pSB1C3	Ig Kappa (digest. GSY3)
P137	pSB1C3	T7/BM40 aus GSY
P160	pSB1C3	NanoLuc + StrepTag + Poly-A

Procedure:

Transformation following SOP(13.02.2013)

Fermentation

Investigator: NA

Aim of the experiment: Streptavidin production

Procedure:

exponential feed (glucose, MgSO₄, Thiamin, Amp, HCDF salt, micronutrients) for ~13 h (about 3-4 L)
Induction of streptavidin expression (anhydro tetracyclin) at OD= 111.2
production over night

Thursday, August 11

Minipreps and analytical digestion of BBa_I0500 (AraC+ pBAD), BBa_J61046 (LoxP) and F189 (BirA)

Investigator: LK

Aim of the experiment: Isolating and verifiing the plasmids.

Procedure:

The Preperation was performed according to the manufacturer's protocol.
Each plasmid was digested with EcoRI and PstI and a gel-elctrophoresis (1% Agarose) of the digestion-batches was performed.

Results:

BBa_I0500 (AraC+ pBAD) = P246 and P247: Band at ~1250; Cloning was succesful
BBa_J61046 (LoxP) = P244 and P245: Fragment is too small (34Bp), not visible on gel.
F189 (BirA) = P248: Band at ~ 1000Bp; Cloning was succesful

Cloning of Streptavidin-variants into pASK111

Investigator: JB, LK, CG

Aim of experiment:

Cloning of Streptactin, Traptavidin, Streptavidin into CamR pASK111

Procedure:

Digestion of about 2.5 µg of each plasmid in 30 µl mix:

25 µl P233 (Streptavidin) with XbaI, HindIII -> Gel 1, left lane, expected fragment at about 400 bp -> F195
25 µl P231 (Traptavidin) with XbaI, HindIII -> Gel 1, right lane, expected fragment at about 400 bp -> F196
15 µl P241 (PAS-Lysin) with XbaI, HindIII -> Gel 2, left lane, expected fragment at about 400 bp -> -
25 µl P229 (Streptactin) with XbaI, HindIII -> Gel 2, left right, expected fragment at about 400 bp -> F197
15 µl P249 (pASK111) with XbaI, HindIII -> Gel 3, left lane, expected fragment at about 3000 bp -> F198

Ligation in 20 µl mix overnight (s. fragment names above):

F199: 3.7 µl F195 + 6.3 µl F198
F200: 5.4 µl F196 + 4.6 µl F198
F201: 4.1 µl F197+ 5.9 µl F198

Transformation according to SOP.

Results:

Gel 1:

Gel 2:

Gel 3:

Testpolymerization: BSA-coating

Investigator: EU, JH

Aim of experiment:

Coating of 6-well plate with BSA according to a modified ELISA-protocol.

Procedure:

Bicarbonate/carbonate coating buffer (100mM): 30,3 mg Na2CO3 60 mg NaHCO3 10 ml distilled water

"Blocking" Buffer: 1% BSA in PBS

Each well was covered with 0,5 ml BSA buffer and 0,5 ml bicarbonate buffer. After overnight incubation at RT, solution in wells was aspirated one by one and streptavidin was added. After a short incubation, the streptavidin(&Tris/HCl) solution was aspirated and Biotin solution was added (by needle).

1. well: 200 µl Streptavidin (11,2 mg/ml) + 200 µl Biotin, 2. well: 400 µl Streptavidin and 400 µl Tris/HCl + 200 µl Biotin, 3. well: 500 µl Streptavidin and 500 µl Tris/HCl + 300 µl Biotin, 4. well: 500 µl Streptavidin + 10 µl Biotin (this time with 2,5 µl pipette)

Results:

Overall polymerization was observed again, although it seemed more like an aggregation than a polymerization. No coating was observed except in the 4. well. Biotin-injection speed may be the critical point.

Poly-D-Lysine coating will follow as next step.

Transformation of P64; P73

Investigator: MT

Aim of the experiment:

Amplification of P22; P67; P122; P137; P160

#	Plasmid	Description
P64	pSB1C3	VEGF-p2a-PDGF
P73	pSB1C3	Poly-A

Procedure:

Transformation following SOP(13.02.2013)

Over night liquid culture of P22; P67; P122; P137; P160

Investigator: EF, MP

Aim of the experiment:

Getting enough cellmass for plasmid preparation

Procedure:

Inoculation of 5 mL LB-medium (containing antibiotica) with colonies of foregone transformation
Incubate over night at 37 °C in shaker

harvesting streptavidin

Investigator: NA

Aim of the experiment: streptavidin production

Procedure:

OD= 174
centrifuge culture
freeze pellet

SDS PAGE Streptavidin fermentation

Investigator: NA

Aim of the experiment: Verification of successfull production

Procedure:

according to protocol
8 µl Ladder; before induction; after induction
both samples: 3 µl culture + 77 µl TB + 20 µl SDS buffer; 12 µl on SDS gel

Results:

The fermentation was not successful, streptavidin band (unter 15 kDa marker) is just a bit thicker. The reason might be the ampR of the transformed plasmid. Due to the high cell concentration beta lactamase (secreted in periplasma) gets in the medium and hydrolyses amp. As a result cells lose plasmid because there is no selective pressure without an antibiotic in medium.

next step: cloning pf streptavidin mutants into pASK111 (camR)

Sequencing of P238, P245, P248

Investigator: NA

Procedure:

Sequencing batch were prepared after manufacturer's protocol. (15 µl of plasmid DNA (50 - 100 ng) and 2 µl sequencing primer) - all samples: VF2
barcodes in stock list

Friday, August 12

PCR of Gensythesis (GSY) 7 and 8

Investigator: MT

Aim of the experiment:

Amplification of GSY 7 and 8

Procedure:

PCR Using Q5® High-Fidelity DNA Polymerase (M0491) according to online protocol

Component	25 µL reaction	Final concentration
5X Q5 Reaction Buffer	5 µL	1 X
10 mM dNTPs	0.5 µL	200 μM
10 μM Forward Primer (D20)	1.25 μl	0.5 μM
10 μM Reverse Primer (VR)	1.25 μl	0.5 μM
Template DNA	1 µL	10 ng
Q5 High-Fidelity DNA Polymerase	0.25 μl	0.02 U/μl
Nuclease-Free Water	to 25 μl

Thermocycling Conditions for a Routine PCR:

STEP	TEMP	TIME
Initial Denaturation	98 °C	30 sec
35 cycles	98 °C	5 - 10 sec
	61 °C	30 sec
	72 °C	60 sec
Final extension	72 °C	120 sec
Hold	16 °C

Note: Use of the NEB T m Calculator is highly recommended.

Results:

After running on 1 %agarose gel only the 2kb bands belonging to GSY8 could be distinguished. These were extracted from the gel.

-> Repeat PCR for GSY7

Gelextraction of GSY8

Investigator: EF

Aim of the experiment: Gelextraction of 2kb band of PCR belonging to GSY8 Procedure:

Gelextraction was performed by manufacturers protocol (SLG).

Concentration:

7,7 ng/ul

Plasmid preparation of liquid culture of P22; P67; P122; P137; P160

Investigator: MP

Aim of the experiment:

Purification of P22; P67; P122; P137; P160

#	Plasmid	Description
P22	K157001	RFP-Gen.(Retrafo P4)
P67	pSB1C3	EGFR signal peptide (transloc. pore)
P122	pSB1C3	Ig Kappa (digest. GSY3)
P137	pSB1C3	T7/BM40 aus GSY
P160	pSB1C3	NanoLuc + StrepTag + Poly-A

Procedure:

According to Mini-prep kit, SLG

Results:

P22 ->P1001 103.6 ng/µL
P67 ->P1004 92.9 µL
P122 -> P1000 80.8 ng/µL
P137 -> P1003 87.9 µL
P160 -> P1002 100 ng/µL

Dephosphorylation of F113[HincII digested]

Investigator: MP, EF

Aim of the experiment:

Dephosphorylation of F113[HincII digested] (RFP-Reportercassette )

Procedure: According to NEB online Protocol for Dephosphorylation of 5 ́-ends of DNA using Antarctic Phosphatase (M0289):

12 µL F113 (85.1 ng/µL)
2 µL Antarctic Phosphatase Rxn Buffer (10X)
1 µL Antarctic Phosphatase (5000 u/mL)
5 µL ddH2O

Midiprep P238 (CMV-IgKappa-Nanoluc-Strep-polyA)

Investigator: NA

Procedure:

MidiPrep was performed according to manufacturer's protocol (QIAprep MidiPrep, Qiagen)

Results:

P253 - concentration: 2134 ng/µl

Saturday, August 13

Miniprep of pASK111 (empty) and diegestion

Investigator: LK

Aim of the experiment: Amplification of pASK111 and digestion for further ligation with SUMO-PAS-Lysin.

Procedure:

The Miniprep was performed according to the manufacturer's protocol.
The whole DNA was diegested with XbaI and HindIII. Over night at 37°C.
Gelelectrophoresis was performed and showed a significant band at ~2700.

Comment

Gel-ectraction has yet to be done .
equally digested insert from P236 was visible on gel. --> no ligation possible.

Transformation of F1006; F1007; F1008

Investigator: MT

Aim of the experiment:

Amplification of F1006; F1007; F1008

#	Ligation	Plasmid	Description
F1006	F1000 + F1002	pSB1C3	Ig Kappa + NanoLuc + StrepTag + Poly-A
F1007	F1003 + F1002	pSB1C3	T7/BM40 + NanoLuc + StrepTag + Poly-A
F1008	F1001 + F1002	pSB1C3	EGFR + NanoLuc + StrepTag + Poly-A

Procedure:

Transformation following SOP(13.02.2013)

Digestion and gelextraction of P64; P73

Investigator: JB, MT

Aim of the experiment:

Preparation for ligation

Procedure:

10 µL DNA
1 µL enzyme 1
1 µL enzyme 2
2 µL buffer
6 µL ddH20

Enzymes used:

P64: EcoRI + SpeI
P73: EcoRI + XbaI

Gelextraction:

Using gelextraction kit, Quiagen

Results:'

Left: P64 Right: P73

P64 -> F1011 14,2 ng/µL
P73 -> F1012 17,6 ng/µL

Sunday, August 14

Miniprep of P199-P201 and analytical digestion

Investigator: LK

Aim of the experiment: Isolation of "Streptavidin-variants" in pASK111 for preinoculation tomorrow.

Procedure:

The Miniprep was performed according to the manufacturer's protocol.
~200ng where digested with XbaI and HindIII.

Results:

All samples showed significant bands at ~400 Bp.

Transformation of P199-201 into E.coli BL-21

Investigator: LK

Aim of the experiment: Introducing Strep-variants in pASK111 into BL-21 for further fermentation.

Procedure:

The cells were transformed according to the SOP with 1µl of DNA and after 1h of incubation in LB without antibiotics plated out on Cam-plates.

Miniprep of P113-P213 and analytical digestion

Investigator: LK Aim of the experiment: Isolation of "Streptavidin-variants" in pASK111 for preinoculation tomorrow.

Procedure:

The Miniprep was performed according to the manufacturer's protocol.
~200 ng were digested with EcoRI and PstI.

Results:

PCR of Gensynthesis (GSY) 7, 8

Investigator: MT

Aim of the experiment:

Amplification of GSY7

Procedure:

PCR Using Q5® High-Fidelity DNA Polymerase (M0491)
Different amounts of template DNA were used

Component	50 µL reaction	Final concentration
5X Q5 Reaction Buffer	10 µL	1 X
10 mM dNTPs	1 µL	200 μM
10 μM Forward Primer (D20)	2,5 μl	0.5 μM
10 μM Reverse Primer (VR)	2,5 μl	0.5 μM
Template DNA	1 µL	1 - 10 ng
Q5 High-Fidelity DNA Polymerase	0.5 μl	0.02 U/μl
Nuclease-Free Water	to 50 μl

Thermocycling Conditions for a Routine PCR:

STEP	TEMP	TIME
Initial Denaturation	98 °C	30 sec
40 cycles	98 °C	5 - 10 sec
	58 °C	30 sec
	72 °C	60 sec
Final extension	72 °C	120 sec
Hold	4 °C

Results:

PCR GSY8 successful.

-> Do it again for GSY 7!

Over night liquid culture of F1006; F1007; F1008

Investigator: MT

Aim of the experiment:

Getting enough cellmass for plasmid preparation

Procedure:

Inoculation of 5 mL LB-medium (containing antibiotica) with colonies of foregone transformation
Incubate over night at 37 °C in shaker

Gelextaction of F1004

Investigator: MT

Aim of the experiment:

Procedure:

Using gelextraction kit, Quiagen

Results:'

long F1004 -> F1013 6,4 ng/µL
short F1004 -> F1014 1,1 ng/µL

Ligation F1012 + F1011

Investigator: MT

Aim of the experiment:

Ligation F1012 + F1011

#	Plasmind	Description
F1011		VEGF-p2a-PDGF
F1012	pSB1C3	Poly-A

Procedure:

3 µL F1012
6 µL F1011
2 µL buffer
1 µL T4 Ligase
8 µL ddH2O

Results:

F1015

Transformation of F1015

Investigator: MT

Aim of the experiment:

Amplification of F1015

#	Ligation	Plasmid	Description
F1015	F1011 + F1012	pSB1C3	VEGF-p2a-PDGF + poly-A

Procedure:

Transformation following SOP(13.02.2013)

Results:

No colonies. Do it again.

Week 14, Aug 15th - Aug 21st

Monday, Aug 15th

Analytical digestion of P251 and P252

Investigator: Clemens

Aim of the experiment: Verify cloning

Procedure:

1µL Plasmid was digested with 1µL of EcoRI and PstI
Digestions were incubated for 1h
Samples were seperated by gelelectrophoresis on a 1% agarose gel

Results:

Cloning seems to have worked

500px

Plasmidpreparation of liquid culture of F1006; F1007; F1008

Investigator: MP

Aim of the experiment:

Purification of F1006; F1007; F1008

#	Plasmid	Description
F1006	pSB1C3	Ig Kappa + NanoLuc + StrepTag + Poly-A
F1007	pSB1C3	T7/BM40 + NanoLuc + StrepTag + Poly-A
F1008	pSB1C3	EGFR + NanoLuc + StrepTag + Poly-A

Procedure:

According to Mini-prep. kit, Quiagen

Results:

F1006 -> F1005 83.2 ng/ÂµL
F1007 -> F1006 91.8 ng/ÂµL
F1008 -> F1007 367.1 ng/ÂµL

Cloning of Nanoluc-Strep in front of double terminator and PAS-Lysine into pASK111

Investigator: LK, CG

Aim of experiment:

Cloning of Nanoluc-Strep in front of double terminator and PAS-Lysine into pASK111

Procedure:

Plasmid preperation according to SOP of P264, P265

Digestion of about 3 µg of each plasmid in 30 µl mix:

6 µl P29 (double teminator) with EcoRI, XbaI -> Gel 1, left lane, expected fragment at about 3000 bp -> F207
15 µl P98 (Nanoluc-Strep) with EcoRI, SpeI -> Gel 1, right lane, expected fragment at about 500 bp -> F208
15 µl P264 (PAS-Lysin) with XbaI, HindIII -> Gel 2, left lane, expected fragment at about 1000 bp -> F210

Ligation in 20 µl mix for 30 min. at room temperature (s. fragment names above):

F209: 3.7 µl F207 + 6.3 µl F208
F211: 1.1 µl F210 + 8.9 µl F206

Transformation according to SOP.

Results:

Gel 1:

Gel 2:

Tuesday, Aug 16th

Over night liquid culture of P64; P73

Investigator: MP

Aim of the experiment:

Getting enough cellmass for plasmid preparation

Procedure:

Inoculation of 5 mL LB-medium (containing antibiotica) with colonies of foregone transformation
Incubate over night at 37 °C in shaker

Gelextraction of PCR GSY8(Saturday, August 13)

Investigator: MP

Aim of the experiment:

Purification of PCR GSY8(Sunday, August 14)

Procedure:

Using gelextraction kit, SLG

Results:

F1016 3,4 ng/µL

Seeding of HEK293T cells for transfection

Investigator: LK, CG

Aim of the experiment:

3x4 petri dishes with HEK293T cells for performing the Nanoluc assay in order to validate the signale peptides

Procedure:

Washing each T75 flask with 10 ml PBS
Centrifugation for 10 min. at 1.8 rcf
Resuspending the cell pellet in 10 ml medium
Counting the cells (33x10^6 cells in 10 ml)
Plating 0.5x10^6 cells onto petri dishes in 10 ml medium an 1x10^6 onto a T75 flask
Incubation for 2 days

Results:

ready to transfect cells in petri dishes

Gelextraction of PCR GSY8(Saturday, August 13)

Investigator: MP

Aim of the experiment:

Purification of PCR GSY8(Sunday, August 14)

Procedure:

Using gelextraction kit, SLG

Results:

F1016 3,4 ng/µL

Transformation of F1015

Investigator: MT

Aim of the experiment:

Amplification of F1015

#	Ligation	Plasmid	Description
F1015	F1011 + F1012	pSB1C3	VEGF-p2a-PDGF + poly-A

Procedure:

Transformation following SOP(13.02.2013)

PCR of Gensynthesis (GSY) 7

Investigator: EF

Aim of the experiment:

Amplification of GSY7

Procedure:

PCR Using Q5® High-Fidelity DNA Polymerase (M0491)
Reactions with and without GC Enhancer were performed

Component	50 µL reaction x 6	Final concentration
5X Q5 Reaction Buffer	10 µL	1 X
10 mM dNTPs	1 µL	200 μM
10 μM Forward Primer (D20)	2,5 μl	0.5 μM
10 μM Reverse Primer (VR)	2,5 μl	0.5 μM
Template DNA	1 µL	1 ng
Q5 High-Fidelity DNA Polymerase	0.5 μl	0.02 U/μl
5X Q5 High GC Enhancer (optional)	5 µL	1X
Nuclease-Free Water	to 50 μl

Thermocycling Conditions for a Routine PCR:

STEP	TEMP	TIME
Initial Denaturation	98 °C	30 sec
40 cycles	98 °C	5 - 10 sec
	58 °C	30 sec
	72 °C	60 sec
Final extension	72 °C	120 sec
Hold	16 °C

Results:

negativ. Two 1% agarose gels were performed to prove the PCR product. Both were negativ.

Precipitation of eGFP

Investigator: LK

Aim of experiment: Determination of (NH₄)₂SO₄ -concentration needed to precipitate eGFP.

Procedure:

50mL of eGFP solution (from fermentation) where gradually precipitated with rising concentrations (NH₄)₂SO₄ (step size: 400mM)
All steps where performed at 4°C.
Pellets where solved in 10 mL 1x PBS.

Results:

Extinction:

Maximum Absorption at 488nm for eGFP. Absorption coefficient(eGFP,488): 53000 mol/Lcm.

mM (NH₄)₂SO₄	Dilution	Extinction	Concentration eGFP [µM]
400	1:10	0,197	37,0
800	1:10	0,084	15,8
1200	1:10	0,457	86,2
1600	1:100	0,16	301,8
2000	1:100	0,375	707,5
2400	1:10	0,505	95,3
2800	1:10	0,08	15,0

Inocculation of P258_E.coli_Bl-21 in M9 medium for fermentation

Investigator: LK

Procedure:

M9 medium with Cam (1:1000) was inocculated with preculture (~50 mL) of P258 (pASK111+Streptavidin)

the culture was incubated in the shaker over night at 37°C

Phosphorylation of F1005; F1016

Investigator: MP

Aim of the experiment:

Phosphorylation of F1005; F1016

Procedure:

39 µL DNA
5 µL 10x T4 PNK Bufer
10 mM PNK
T4 PNK

Phosphorylation of O31; O32

Investigator: MP

Aim of the experiment:

Phosphorylation of O31; O32

Procedure:

0.5 µL Oligonucleotides (10µM)
2 µL 10x T4 PNK Bufer
2 µL 10 mM PNK
1 µL T4 PNK
14.5 µL H2O

Hybridization of phosphorylated O31; O32

Investigator: MP

Aim of the experiment:

Hybridization of phosphorylated oligonucleotides: O31; O32

Procedure:

2 µL O31
2 µL O32
200 µL ddH20

Wednesday, August 17

Gelelectrophoresis of GSY7

Investigator: EF

Aim of experiment: gelelectrophoresis of the remaining product of GSY7 PCR (from 16.8.16)

Procedure: Agarose gelelectrophoresis was performed using an increased amount of SYBR Green

Results There was no PCR product identified.

Plasmidpreparation of liquid culture of P64; P73

Investigator: MP

Aim of the experiment:

Purification of P64; P73

#	Plasmid	Description
P64	pSB1C3	VEGF-p2a-PDGF
P73	pSB1C3	Poly-A

Procedure:

According to Mini-prep. kit, SLG

Results:'

P64 134.4 ng/µL
P73 149.4 ng/µL

Over night liquid culture of F1015

Investigator: MP

Aim of the experiment:

Getting enough cellmass for plasmid preparation

Procedure:

Inoculation of 5 mL LB-medium (containing antibiotica) with colonies of foregone transformation
Incubate over night at 37 °C in shaker

PCR of scAvidin

Investigator: Julian

Aim: Extraction of single chain Avidin from vector for further cloning

Procedure:

reaction was performed after SOP (PCR Using Q5® High-Fidelity DNA Polymerase, NEB)
2 ng Plasmid were used for amplification (1 µL)
Primers: O-27 and O-28

PCR program (standard):

Step	Temperature [°C]	Time [s]
initial denaturation	98	120
35 cycles	98	10
	64	30
	72	300
final extension	72	300
Hold	4	ꝏ

Quickchange of P206 and P239 to correct BAP

Investigator: Julian

Aim: Quickchange P206 (BAP-NanoLuc) and P239 (BAP-NanoLuc-A3C5) to correct BAP

Procedure:

reaction was performed after SOP (PCR usingPfuUltra II Fusion HS DNA Polymerase, Agilent)
10 ng Plasmid were used for amplification (2.5 µL)
Primers: O-33 and O-34

Step	Temperature [°C]	Time [s]
initial denaturation	98	120
35 cycles	98	10
	55	30
	68	300
final extension	68	360
Hold	4	ꝏ

Inocculation of fermenter

Investigator: NA

Aim of the experiment: streptavidin production

Procedure:

centrifuge preculture (P258 in M9 medium)
resuspend pellet in HCDF medium of fermenter and inocculate
pO₂= 60 %; Temp= 37°C, pH~7
growth over night

Thursday, Aug 18th

PCR of gene synthesises 8 with Q5 polymerase

Investigator: EF

Aim of the experiment: Amplification of GSY7 with optimized Tm following negativ PCR reactions in order to amplify GSY7. Procedure: Approach:

2,5 µl forward Primer VF2
2,5µl reverse Primer VR
1µl dNTPs
1µl DNA (1ng)
10µl 5x Q5-Puffer
0,5µl Q5-Polymerase
Fill up with water up to 50 µl

Setup: (calculated with NEB calc. http://tmcalculator.neb.com/#!/)

98°C_2min initiation step
98°C_10sec
62°C_30sec > step 2-4: 35 repeats
72°C_1min
72°C_5min final step
4°_hold

PCR of gene synthesises 8 with Pfu Ultra II polymerase

Investigator: EF

Aim of the experiment: Amplification of GSY7 with Pfu Ultra II polymerase following negativ PCR reactions in order to amplify GSY7. Procedure: Approach:

2,5 µl forward Primer VF2
2,5µl reverse Primer VR
1µl dNTPs
1µl DNA (1ng)
10µl Pfu Ultra II-Puffer
0,5µl Q5-Polymerase
Fill up with water up to 50 µl

Setup: (calculated with NEB calc. http://tmcalculator.neb.com/#!/)

98°C_2min initiation step
98°C_10sec
56°C_30sec > step 2-4: 35 repeats
72°C_2min
72°C_5min final step
4°_hold

Fermentation

Investigator: NA

Aim of the experiment: Streptavidin production

Procedure:

exponential feed (Cam) for ~13 h (about 3-4 L); start at OD= 11.66
Induction of streptavidin expression (anhydro tetracyclin) at OD= 119
change of settings: pO2= 40 %; Temp= 30°C, pH~7
production over night

Streptavidin production in shaking flask

Investigator: NA

Aim of the experiment: Streptavidin production

Procedure:

2 L LB medium (Cam 1:1000) was inocculated with ~10 ml M9 preculture (P258 in BL21)
induction with anhydro tetracycline (200µl, 2 mg/ml) at OD= 3,32
culture was incubated at 37 °C and 140 rpm for 4 hours
after expression, cultures were transferred into centrifuge tubes and spun down in the centrifuge (4 °C, 5000 rpm, 20 min, F4X1L rotor)
the supernatant was discarded, and the pellet was frozen away

Transformation of quickchanged P239 and 206 (BAP_Nanoluc_A3C5 and BAP_Nanoluc)

Investigator: LK

Procedure:

After DpnI-digestion 10µl of each plasmid was transformed into E.coli XL-1-blue.
Cells where plated out an Cam-plates after 1h of incubation without antibiotics.

MiniPrep of F209 to P266 and P267, analytic digestion

Investigator: JL

Aim of the experiment: Verification of successful cloning.

Procedure: MiniPrep was performed according to manufacturer's protocol (QIAprep MiniPrep, Qiagen)

Concentrations:

Plasmid	c [ng/µl]
P266	198
P267	200,8

Analytic digestion: 0.5 µl PstI, 0,5 µl EcoRI, 1 µl CutSmart, 6 µl ddH2O for P266 and P267 for 2 h at 37°C.
1% agarose gel electrophoresis.

Results:

Lane 1: 10 µl 1 kb Ladder.
Lane 2: Digest of F209 to P266.
Lane 3: Digest of F209 to P267.

Phosphorylation of O31; O32

Investigator: MP

Aim of the experiment:

Phosphorylation of O31; O32

Procedure:

5 µL Oligonucleotides (µM)
2 µL 10x T4 PNK Bufer
2 µL 10 mM PNK
1 µL T4 PNK
10 µL H2O

Hybridization of phosphorylated O31; O32

Investigator: MP

Aim of the experiment:

Hybridization of phosphorylated oligonucleotides: O31; O32

Procedure:

2 µL O31
2 µL O32
200 µL ddH20

Plasmidpreparation of liquid culture of F1015

Investigator: MP

Aim of the experiment:

Purification of F1015

#	Plasmid	Description
F1015	pSB1C3	VEGF-p2a-PDGF + Poly-A

Procedure:

According to Mini-prep. kit, SLG

Results:'

F1015 -> P1008 256.6 ng/µL

Friday, Aug 19th

Gelelectrophoresis of GSY7

Investigator: EF

Aim of experiment: gel electrophoresis of repeated GSY7 PCR (from 18.8.16)

Procedure: Agarose gelelectrophoresis was performed at 90V

Results There was no PCR product identified.

harvesting streptavidin

Investigator: NA

Aim of the experiment: streptavidin production

Procedure:

OD= 181
centrifuge culture for 1 h at 4800 rpm
freeze pellet (2033 g)

SDS PAGE Streptavidin fermentation

Investigator: NA

Aim of the experiment: Verification of successfull production

Procedure:

according to protocol
8 µl Ladder; before induction; after induction; sample of shaking flask production after induction
all samples: 0.5/OD µl culture filled up with EB to 80µl + 20 µl SDS buffer; 10 µl on SDS gel

Results:

waiting for photo

Miniprep of F211 (pASK111(PAS Lys)), I739001 (Biobrick) and F206 (pASK111 vectorfragment)

Investigator: Clemens

Aim of the experiment: Miniprep of plasmids Procedure:

Miniprep was performed by manufacturers protocol (Qiaprep, Qiagen)
Plasmids were named:
- F211 a: P268
- F211 b: P269
- I739001 a: P270
- I739001 b: P271
- F206 a: P272
- F206 b: P273

Cloning of P260 in P261 and F215 in P74

Investigator: Clemens

Aim of the experiment: Digestion, ligation and transformation Procedure:

Transfection of HEK cells with P253, P225 and P226

Investigator: LK

Aim of the experiment: Transfecting HEK cells with vectors encoding 3 diffrent types of signal peptides for secretion.

Procedure:

HEK293 where cultured and seeded out on 12 cellculture dishes. (~5x10⁵ cells per dish)
Transfection was performed on day 3 after seeding (60-70% confluency)
10µg DNA of each signalpeptide mixed with 30µg PEI (polyenthylenimine) in ddH2O where incubated for 15 min and added to the cells, which where previously washed with PBS and covered (4mL) with optiMEM media. (Pen/Strep;No serum!)
After 4h of incubation at 37°C, 5% CO₂ the media was changed to RPMI (Pen/Strep; 5% FCS) again.

Picking of E. coli XL1 blue in quickchanged pSB1C3 in P239 and P206, Retrafo of P261 and P213

Investigator: JL

Procedure:

Quickchanged pSB1C3 in P239: Colonies were picked from Cam-plates.

Retrafo of P261 and P213: Colonies were picked from Cam-plates.

Picked pipette tips was transferred into cell-culture tubes with air-permeable, sterile cover. Each tube contains 4 mL of LB-medium + 4 µL of the proper antibiotic.

These tubes were transferred in a cell culture shaker at 37 °C and were incubated overnight

Repeat of PCR of scAvidin

Investigator: Julian

Aim: Extraction of single chain Avidin from vector for further cloning

Procedure:

reaction was performed after SOP (PCR Using Q5® High-Fidelity 2X Master Mix, NEB)
2 ng Plasmid were used for amplification
Primers: O-27 and O-28
annealing temperature was lowered to 60 °C

PCR program (standard):

Step	Temperature [°C]	Time [s]
initial denaturation	98	120
35 cycles	98	10
	60	30
	72	150
final extension	72	300
Hold	4	ꝏ

Repeat of PCR of Gene Synthesis 9

Investigator: Julian

Aim: Amplification of gensynthesis 9 for further cloning

Procedure:

reaction was performed after SOP (PCR Using Q5® High-Fidelity 2X Master Mix, NEB)
2 ng Plasmid were used for amplification
Primers: VF2 and VR

PCR program (standard):

Step	Temperature [°C]	Time [s]
initial denaturation	98	120
35 cycles	98	10
	61	30
	72	120
final extension	72	300
Hold	4	ꝏ

Preparative digestion of P8 (Streptavidin wt)

Investigator: Julian

Aim of experiment: preparation for cloning of SA1 into pASK111

Procedure:

preparative digestion batch

volume	reagent
40 µl	Plasmid DNA P8
5 µl	Cutsmart (10x)
1.5 µl	HindIII
1.5 µl	XbaI
2 µl	ddH2O
=50 µl	TOTAL

duration: over night

Saturday, Aug 20th

Miniprep and analytical digestion of P274-P277

Investigator: LK

Aim of the experiment: Isolating and verifiing A3C5+EspP_ddT ligation, "quickchanged" BAP-constructs and amplification of A3C5 in pSB1C3.

Procedure:

Minipreps where performed according to manufacturer's protocol.
Analytical digestion with EcoRI and PstI of ~ 200-250ng of each plasmid was performed for 30 min at 37°C.

Results:

Sunday, Aug 21st

Cloning of GSY9 and scAvidin

Investigaor: LK, JL

Procedure:

The PCR of scAvdin was digested over night with SpeI and NgoMIV at 37°C.
The PCR of GSY9 was divided: one half was digested with XbaI and AgeI (-> F224) and the other half was digested with XbaI and HindIII (->F225).
Additionally P74 (pSB1C3+RFP-Reporter) was digested with XbaI and AgeI (-> F227) to provide a plasmid for the ligation with F224.

The digestions where plotted on a gel, and bands at 1700Bp for scAvidin, 222Bp for TetO-OmpA, 490Bp for eMA and 2100Bp for pSB1C3 where cut out and purified with the Promega Wizard SV Gel Kit according to the manufactuerers protocol.

F224 (TetO-OmpA) was then ligated with F227 (pSB1C3), F225 (enhanced monomeric Avidin) was ligated with F206 (pASK111) and F226 (scAvidin) was ligated with F218 (pSB1C3). Ligations where incubated over night at 16°C.

Transformation was performed according to the SOP on Monday morning.

Week 15, Aug 22nd - Aug 28th

Monday, Aug 15th

Sequencing of P268, P276, P277 and P279

Investigator: Julian

Aim of the experiment: Sequencing of P268 (PAS lysine), P276 (QC BAP-NanoLuc-A3C5), P277 (QC BAP-NanoLuc) and P279 (A3C5-EspP-DoubleTerminator)

Procedure:

Sequencing batch were prepared after manufacturer's protocol. (15 µl of plasmid DNA (50 - 100 ng) and 2 µl sequencing primer)

P268 (D20) FR12904429
P276 (VF2) FR12904428
P277 (VF2) FR12904427
P279 (VF2) FR12904426

Analytical digestion of P278 (pSB1C3(A3C5-EspP-doubleterminator) & P279

Investigator: Clemens

Aim of the experiment: cofirm success of cloning

Procedure:

Analytical digestion was performed according to the following chart:

@@ Line 9,750: / Line 9,750: @@
 </div>
+<div class="receptor">
+=== Analytical digestion of P278 (pSB1C3(A3C5-EspP-doubleterminator) & P279 ===
+'''Investigator: Clemens'''
+'''Aim of the experiment:''' cofirm success of cloning
+'''Procedure:'''
+Analytical digestion was performed according to the following chart:
+</div>
 </div>

Difference between revisions of "Team:LMU-TUM Munich/Labjournal"

Revision as of 05:52, 23 August 2016

Labjournal

Samples

Transformation of E. coli XL1 blue with Phytochrome B (2–908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3)

Miniprep of pTUM100 with pGAL, pTEF1, pTEF2, pADH and RFC25 compatible RFP generator

Sequencing of RFP-Generator (RFC25, pSB1C3)

Picking of of E. coli XL1 blue with Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3)

Analytical digestion and gelelectrophoresis of RFP-generator (RFC25, pSB1C3, P4 & P5)

Sequencing of pTUM vectors with pGAL, pADH, pTEF1, pTEF2

Miniprep of Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3)

Analytical digestion and gelelectrophoresis of Phytochrome B (2-908 N-terminal amino acids) (BBa_K801031, RFC25, pSB1C3), P7 - P10

Transformation of E. coli XL1 blue with

Week 1, May 16th - May 22nd

Monday, May 16th

Streptavidin Plasmid Check

Streptavidin Expression: Transform BL21

Tuesday, May 17th

SDS Gel Analysis

MiniPreps pSb1C3–AviTag, –A3C5 and pASK75–(SA1), –(SAm1)

Inoculation of Pre-Culture with BL21 (pASK75 (SA1)) in LB Medium

Wednesday, May 18th

Repeat Analytical Gel of pSb1C3–AviTag, –A3C5

Inoculation of BL21 (pASK75 (SA1)) Culture in 2 L TB Medium and Induction of Streptavidin Production by Addition of Tetracycline

Expression and Harvest of Streptavidin (pASK75 (SA1)) in BL21 in TB Medium

Dialysis of eGFP

MiniPrep of quickchanged pNGAL146-A2 EspP

Sequencing of P14 (Avi-Tag), P15 (A3C5) & P19 (Quick change (QC) EspP in pNGAL-A2)

Digestion of P16 , P17, P18 & P19 (all QC EspP in pNGAL-A2) with AgeI & HindIII + analytical gel

Thursday, May 19th

Re-Sequencing of P19

Cloning of A3C5 and Avi-Tag into pSB1C3

Streptavidin refolding

Biotinylation of BSA

Friday, May 20th

Qualitative analysis of streptavidin expression

Cloning of A3C5 and Avi-Tag into pSB1C3

Transformation of Biobricks in XL1-blue

Ammonium sulfate precipitation of streptavidin

Dialysis of biotinylated BSA

Week 2 (May 23rd - May 29th)

Monday, May 23th

Cloning of A3C5 and Avi-Tag into pSB1C3

Filtration of Streptavidin and precipitation with Ammonium-sulfate

Inoculation of pre-culture with BioBricks in pSB1C3 in LB-Cam

Retransformation of Biobricks in XL1-blue

Tuesday, May 24th

Inoculation of pre-culture with BioBricks in pSB1C3 in LB-Cam

Cloning of A3C5 and Avi-Tag into pSB1C3

Ammonium sulfate precipitation

MiniPrep of BioBricks in pSB1C3 (inoculated on May 23th)

Sequencing of P23 (weak RBS), P24 (double terminator) & P24 (Tet repressed GFP)

Wednesday, May 25th

Inoculation of pre-culture with tet-repressed GFP (P25) in LB-Cam

MiniPrep of K747096, I14033, R0040, B0015, K577893 and B0032

PCR of P19 (QC EspP) with O3 and O4

Digestion of PCR of EspP (P19 with O3 and O4)

Sequencing of P26 (CMV promotor), P27 (p cat promotor), P28 (Tet repressible promotor), P30 (Tet repressed GFP)

Ion exchange chromatography of eGFP

Thursday, May 26th

Inoculation of cultures with XL-1 F11 and F12 clones

Cloning of ligation F14 +F13

Transformation of Biobrick B0034 in XL1-blue

Transformation of Biobricks K577895 and K577894 in XL1-blue

SDS-PAGE of eGFP-fractions after IEC

Friday, May 27th

Inoculation of pre-cultures with B0034 (strong RBS), K577894 (Tet repressed YFP), KK577895 (Tet repressed RFP), F13+F14

Inoculation of BL21 (pASK75 (SA1)) culture in 2 L TB-Medium and induction of streptavidin production by addition of tetracycline

Re-sequencing of P30 (Tet repressed GFP in pSB1C3)

Expression and harvest of Streptavidin (pASK75 (SA1)) in BL21 in TB-medium

Cloning of A3C5 and Avi-Tag into pSB1C3

Cloning of A3C5 and Avi-Tag into pSB1C3

Week 3 (May 30th - June 5th)

Monday, May 30th

Cloning of A3C5 and Avi-Tag into pSB1C3

Religation of F13 (digest of pSB1C3 with AgeI and NgoMIV) and transformation in XL1 blue

Inoculation of pre-cultures with B0034 (strong RBS), K577894 (TET repressed YFP), KK577895 (Tet repressed RFP), F13+F14

Tuesday, May 31th

Dialysis of eGFP

Expression and harvest of Streptavidin (pASK75 (SA1)) in BL21 in TB-medium