PCR diary for pDEST mCherry with GG cassettes 2.0
Made with Benchling
Project: miRNA and Repressors subgroup
Authors: Elizabeth Strand
Dates: 2016-08-24 to 2016-10-09
Wednesday, 8/24
Starting Over, Primers
We realized the golden gate wouldn't work so we got new primers
Primers only designed for restriction digest + ligation
PCR
Redoing for all -- even though DC RE should still be fine..
Prepare on Ice in this order
Protocol: Q5 repressors b
Thursday, 8/25
Gel Extraction
https://www.neb.com/products/n3200-2-log-dna-ladder-01-100-kb
Used wrong primers so i didn't get any DC :P can try to move forward with DC RE from before (should be fine).
Digestion (10 uL)
Digested for 1.5 hours at 37C
Heat inactivated for 40 mins at 80C (should have only been 20 mins.. ops)
Friday, 8/26
Ligation
Ligating: D+G as well as negative control (D alone)
Gently mix the reaction by pipetting up and down, and microfuge briefly.
For cohesive (sticky) ends, incubate at 16°C overnight or room temperature for 10 minutes.
Chill on ice and transform 1-5 µl of the reaction into 50 µl competent cells.
Transformation
Plating with beads, 5 ul outgrowth + 200 ul water for some or 100 ul of outgrowth (plate labelled)
Saturday, 8/27
Sunday, 8/28
Picked overnights and cultured in 4-5 ml of LB amp
Picked:
3 blue colonies
1 that looked mixed / both colors involved
1 red
Tuesday, 8/30
Overnights looked like this the next day:
Pellets looked like this:
Miniprep Results
Lost Blue 1 :( RIP
Confirmation Digest
Digest with BamHI, NcoI
Digested for 1 hours at 37C
Not enough NcoI to do all digests
Confirmation Gel
B2 and B3 look good!
Sunday, 10/9
Diagnostic Digest
Confirming:
Insertion of promoter/gene
presence of LacZ
CF 10/6 LR Code:
1: pBM3R1: 2kturn - TP901
2: pERE3: TP901
3: pERE5: TP901
4: pERE3: mKate
5: pERE5: mKate
6: pHybrid: BM3R1
(Used the 1 version for everything)
ONLY used "1" version for all
2: pERE3: TP901 3: pERE5: TP901
4: pERE3:mKate 5: pERE5:mKate
Gel
Ran in the above order
ERE5-TP901-GG-1 (3-1) andERE5-mKate-GG-1 (5-1) seem good
will attempt other golden gates with ERE3-TP901-GG-2 (2-2) and ERE-3-mKate-GG-2 (2-4)
PCR Diary for pDEST_mCherry and GG cassettes (06/27/16 - 8/24)
Made with Benchling
Project: miRNA and Repressors subgroup
Authors: Elizabeth Strand
Dates: 2016-06-27 to 2016-08-10
Monday, 6/27
Ran 4 PCR reactions
Set Up:
Protocol: "Q5 repressors1"
Tuesday, 6/28
Ran a Diagnostic Gel
Wednesday, 6/29
Checked concentration after PCR Purification
Stored in -20C Repressor Box
Did Double Digest Protocol (In 10 uL total)
From NEB http://nebcloner.neb.com/#!/
Adjusting the NEB protocol per Brian's recommendations
Positive Control for transformation:
Incubate all reactions at 37C per NEB protocol (1 hour)
Heat inactivated at 80C for 20 mins per NEB protocol.
Holding off on digesting GG cut and GG gibson until pDEST_mCherry is linearized
Stored in -20C Repressor Box
Ligation in 10 uL Reaction
Also used NEB T4 Ligase protocol for sticky ends + transformation into chemically competent cells. Changed amounts according to table below.
Want reaction to be 1:3 (backbone:insert).
Backbone = DEST
insert = mCherry
Note: T4 buffer is in aliquots in our -20C in a tip box. T4 Ligase is in enzyme box. Remove T4 Ligase only when ready to add to reaction
Stored in -20C Repressor Box
Transformation
Sample: DEST + mCherry
Negative Control: Ligation with backbone only (no insert)
Positive Control: pUC19 cut once and religated.
Positive Control: pUC19 never cut
Stored at 4C after incubation
Thursday, 6/30
Results of plating:
Controls fine, Sample only has one colony. Leaving sample at room temp to see if colony turns red.
Also retransforming ligation today.
Nothing turned red -->
Alot of plating and stuff happened that was kinda recorded in the experiment 1 folder Digest and Gel
Thursday, 7/7
REDO Double Digest Protocol (In 20 uL or 10 uL total)
From NEB http://nebcloner.neb.com/#!/
Brian suggested
Incubate at 37C for 3 hours
Redo Ligation in 10 uL Reaction
Also used NEB T4 Ligase protocol for sticky ends + transformation into chemically competent cells. Changed amounts according to table below.
Want reaction to be 1:3 (backbone:insert).
Backbone = DEST
insert = mCherry
Note: T4 buffer is in aliquots in our -20C in a tip box. T4 Ligase is in enzyme box. Remove T4 Ligase only when ready to add to reaction
Gently mix the reaction by pipetting up and down, and microfuge briefly.
For cohesive (sticky) ends, incubate at 16°C overnight or room temperature for 10 minutes.
Chill on ice and transform 1-5 µl of the reaction into 50 µl competent cells.
Plating results: Very few colonies throughout, trashed
Friday, 7/8
Redid PCR reactions
per Brian's tube set up protocol
Set Up:
Protocol: "Q5 repressors1"
Protocol: Q5 repressors 1
Ran on gel, stored bands at 4C
Monday, 7/11
REDO Double Digest Protocol (In 20 uL or 10 uL total)
From NEB http://nebcloner.neb.com/#!/
Brian suggested
Incubated at 37C for 3 hours
Wednesday, 7/13
Redoing Ligation
blue = brian's ligation mixes
green = standard
D = pDest
DM = pDest mCherry (1 pot)
+ = pDest + mCherry
Redo Transformation
per Brian's benchling protocol --> with 5 uL of DNA added instead of 2 uL
Wednesday, 7/20
For the previous diagnostic gel digest (and sequencing) results of pDEST+mCherry, please refer to this note.
Second Diagnostic Gel Digest
Enzymes used for running the pDest+mCherry miniprep products on gel: Nco1 (single cut), Xho1 (single cut)
ALL MEASUREMENTS BELOW ARE ul.
why do we have 2 separate gels for the samples on the table above?
during the loading of the gel, due to a confusion we skipped 1 well between Sample 8 and Sample 9.
GEL 1
GEL 2
Monday, 7/25
Look at testing pDEST_mCherry to see optimal conditions for use.
Results: pDest_mCherry was successful in Tal21:EYFP LR reactions. Both the pDest + mCherry colony 1 and pDest_mCherry_one_pot colony 1 were used. Different of transformed cells were plated: 100uL of transformation, 20ul transformation/200uL water, and 10uL transformation/200 uL water.
The easiest plate to pick colonies was the 10uL/200uL plate using pDest + mCherry. Please see "Testing pDest mCherry (Making Tal21:EYFP)"
Thursday, 7/28
PCR Amplification
PCR for pDest_mCherry (previously referred to as pDest + mCherry colony 1 or 2) backbone, PCR Golden Gate Cassette to include new Q sites and either restricition enzyme sites or Gibson complementary sequence
Prepare on Ice in this order
9uL Ultrapure Water
1uL Template DNA (Any Concentration less than 1 ug)-nanodrop verification.
1.25uL 10uM Forward Primer
1.25uL 10uM Reverse Primer
12.5uL 2X Q5 Master Mix
Gel Extraction
Monday, 8/1
Digestion (10 uL rxn)
From NEB http://nebcloner.neb.com/#!/
Brian suggested
Incubate at 37C for ~1.5 hr
Gently mix the reaction by pipetting up and down, and microfuge briefly.
For cohesive (sticky) ends, incubate at 16°C overnight or room temperature for 10 minutes.
Chill on ice and transform 1-5 µl of the reaction into 50 µl competent cells.
Calculating for Gibson Assembly
Calculations
x = [(base pairs)(650)(0.2) ] / [(1,000)(nanodrop count)]. If size is <200 bases, multiply x by 5 (see source beneath).
Tuesday, 8/2
Suggestions from Brian
To increase yield of gel extraction: up total pcr volume to 50 uL
Adjusting Gibson: his protol calls for 100-200 fmol. In reality, can scale reaction to as little as 7 fmol.
Try to keep Gibson total volume 10 ul, with up to 5 uL for DNA addition. keep DNA equimolar.
Gibson Assembly
Tuesday, 8/9
Diagnostic Gel:
Wednesday, 8/10
Golden Gate Assembly
To do::
Generate pDest-mCherry-GG construct on venchling
Secure bbsI enzyme
Testing pDEST mCherry (Making Tal21:EYFP)
Made with Benchling
Project: miRNA and Repressors subgroup
Authors: Elizabeth Strand
Dates: 2016-07-21 to 2016-07-26
Thursday, 7/21
All DEST's diluted to ~10 fmol/ul
Friday, 7/22
Transformed and plated.
Transformeed as usual, plated:
- 10 uL of transformation + 200 uL of water
- 20 uL of transformation + 200 uL of water
Monday, 7/25
Results of plating
Tuesday, 7/26
nothing
nothing
uncut
pst1
ecor1
ladder
pdest
a
b
nothing
nothing
nothing
Testing pDEST_mChery_GG
Made with Benchling
Project: miRNA and Repressors subgroup
Authors: Elizabeth Strand
Date: 2016-09-23
Friday, 9/23
Suggested Approach
These are just some notes to help you get started.
*Our pDEST_mCherry_GG 2.0 has both an mCherry gene and a LacZ cassette. This means colonies may appear both red and blue. From my experience, the colonies containing mCherry AND LacZ look just straight up blue.
Thus, In order to test pDest_mCherry_GG, I would suggest the following steps
1.
Do an LR, plating on LB-amp plates (no xgal so colonies won't be blue), and then select for the non-red colonies FIRST. This will give you the colonies with the promoter and gene inserted that still have the LacZ cassette.
Destination: pDEST_mCherry_GG_2.0 (Sequence)
Location: -20C, pink "iGEM Repressor + miRNA..." Box, in minipreps section. Label: DEST + GG B2 or B3 (choose either)
Promoter: hef1a
Location: -20C, working stocks box
Gene: choose between bfp, mkate, eyfp
Location: -20C, working stocks box
2.
Grow up overnight cultures then miniprep. Save a little of the culture (1-2ml for later)
3.
Design and run a gel digest & sequence to confirm gene and promoter have been inserted.
4.
Once confirmed, do golden gate with that tube. Follow protocol Golden Gate Protocol
5.
Mini and midiprep
6.
Design and run a restriction digest to ensure 451a sensor has been inserted. Could also try to reconfirm gene and promoter are also there.
Materials for Golden Gate
Follow materials listed in Golden Gate Protocol. These are just notes for a few of the materials/parts of the procedure.
●
"Backbone plasmid" --> Instead of using pDONR, we want to use miniprepped LR product that was created (as stated above)
Location: This is what you miniprepped and confirmed. You choose where to put it, but you should store it in our pink box in -20C, in miniprep section with distinct label.
●
Parts being assembled --> Choose the ultramer for 451 a . This is the only part necessary.
Location: -20C, "Glycerol + siRNA + ultramers box", Labelled 451a ultra (concentration is low, 17.2 ng/ul, you may need to calculate how much you need for golden gate early on and pcr amplify more if necessary.
**Don't leave this box out on the benchtop***