Latest revision as of 14:13, 19 October 2016

TEAM TIANJIN

Team Tianjin-Attribution

Notes for Bacterial Consortium

Week1(7/24/2016-7/30/2016)

Optimization of Culture Conditions

Jul.26th

Prepare M9 medium with TPA and culture Pseudomonas putida KT2440 at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀.

Jul.27th

1.Extract 10 ml LB medium to 5 test tubes and add 0μl, 50μl,, 100μl,, 250μl,, 500μl EG to them, respectively.
2.Add 5μl bacteria solution of Pseudomonas putida KT2440 to five test tubes above.
3.Culture them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀.

Jul.28th

Add 6g TPA, 2.9gNaOH and 1.2g glucose to M9 medium, and culture them in the improved M9 medium and M9 medium of Jul.26 at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Jul.30th

Cultured different bacteria in M9 medium with sodium terephthalate and different concentration of glucose at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Week2(7/31/2016-8/6/2016)

Optimization of Culture Conditions

Jul.31th

Cultured Rhodococcus jostii RHA1 in M9 medium with sodium terephthalate and glucose at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Aug.1th

Cultured Rhodococcus jostii RHA1 in W medium with sodium terephthalate and glucose at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Aug.2th

Cultured Pseudomonas putida KT2440 in W medium with sodium terephthalate and glucose at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Aug.3th

Cultured Pseudomonas putida KT2440 , Rhodococcus jostii RHA1 , Pseudomonas putida KT2440 and Rhodococcus jostii RHA1in W medium with sodium terephthalate and glucose at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Aug.4th

Observed the growth of 1-day pre-cultured bacteria in LB at 30℃:

All above were kept culturing for one more day and were checked on the next day. The next step was to explore the optimal condition for each bacterium and to co-culture each teo of them to see whether the consortium could work well.

The most probable pairs:
1. P.putida KT2440 + R.jostii RHA1;
2. B.subtilis 168 + R.jostii RHA1;
3. B.subtills 168 + P.putida KT2440;
4. R.jostii RHA1 + Y.lipolytia;
5. P.putida KT2440 + Y.lipolytia;
6. E.coli(RFP) + Y.lipolytia.

Aug.5th

Cultured different bacteria in M9 medium with sodium terephthalate at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂: The growth of each bacterium was not as expected, so we considered culturing bacteria in improved W medium.

Co-cultured different pairs in improved W medium in the same condition (using two tubes in each group):

Co-cultured different pairs in LB medium in the same condition(using two tubes in each group):

Aug.6th

Co-cultured different pairs in improved W medium in the same condition (using two tubes in each group):

Microscopic examination of each bacterium and each pair by means of Fuchsin or Gram dye. To our surprise, there were some pairs (P.p + R.j) living well in the same tube and also there were some pairs we were not sure. It seemed that P.putida KT2440 was the dominant bacterium when it was co-cultured with others. We were thinking about limiting its growth by control ingredients in different media.

Construction of PBBR

Aug.5th

Extraction of plasmid pBBR1MCS-2

Aug.6th

Cut pBBR1MCS-2 with restricted enzymes Xba1 and Sac1 and checked by agarose gel electrophoresis:
Failed. After gel recovery, the concentration of digested pBBR1MCS-2 was 2.4 ng/μl, which was too low to be used in the next step.

Gene Knockout of Escherichia coli

We tried to copy tet gene(tetracycline resistance gene) in two overlap area of the fragment(about 500bp and 1000bp,called ‘tet-1’ and ‘tet-2’) and the homologous arms of the knockout gene-atpF and atpH(about 450bp each,called ‘left’ and ‘right’)with the help of PCR.

Week3(8/7/2016-8/13/2016)

Optimization of Culture Conditions

Aug.7th

For each pair, we checked the bacterial concentration at OD_600 and detected the concentration of TPA by UV at Abs_242.According to results of the UV tests, if R.j existed, whatever the strategy was, the concentration of TPA would significantly decrease. Especially for pairs R.j+P.p and R.j + B.s, results showed greater reductions in the concentration of TPA compared with control group.

Pre-culture and acclimatize P.putida KT2440 in a condition with 5% EG To our surprise, this wild type of P.putida could grow well in this condition, we considered increasing the concentration of EG in the condition.

Aug.9th

1.Extract 5ml YPD medium to 8 test tubes, respectively.
2.Added bacteria solution as following table (use two tubes each group)

3.Cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂

Aug.10th

1.Prepared 300ml W0 medium and add 1.5g Yeast Extract, then regarded it W1 medium.
2.Extracted 8ml W1 medium to 16 test tubes, respectively.
3.Added bacteria solution as following table (use two tubes each group).

4.Cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Aug.12th

1.Prepared 200ml W0 medium and add 0.4g Urea, then regarded it W2 medium.
2.Extracted 8ml W2 medium to 16 test tubes, respectively.
3.Added bacteria solution as following table (use two tubes each group)

4.Cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

1.Prepared 200ml W0 medium and add 0.4g KNO3, then regarded it W3 medium.
2.Extracted 8ml W3 medium to 16 test tubes, respectively.
3.Added bacteria solution as following table (use two tubes each group)

4.Cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Aug.13th

1.Extract 5ml W medium to 6 test tubes and add 20μL, 50μL, 80μL EG to them, respectively;
2.Add 10 μL bacteria solution of Pseudomonas putida KT2440 to the six test tubes, respectively;
3. Cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀.

Added bacteria solution to W2, W3 medium as following table (use two tubes each group)

Construction of PBBR

Aug.7th

Repeated the digestion and agarose gel electrophoresis:
Also Failed. After gel recovery, the concentration of digested pBBR1MCS-2 was only 2.4 ng/μl. We needed to increase the concentration of pBBR1MCS-2 in EB Solution.

Aug.8th

Colony PCR of P.putida KT2440 to get genes AcoA & AceA:

Result: Failed. Only primer dimers existed.

Aug.9th

Repeated the colony PCR above:

Result: Also Failed. Only primer dimers existed. We considered using boiled bacteria as the template in the next PCR.

Aug.11th

Extraction of plasmid pBBR1MCS-2.

The nucleic acid concentration of new EB solutions increased a lot. Increasing the amount of E.coli and decreasing the amount of EB did work.

Aug.12th

PCR of P.putida KT2440 to get genes AcoA & AceA:

Result: Successful PCR. Obvious bright bands located at 900+ and 1300+ bp (AcoA 978bp and AceA 1326 bp). Using boiled P.putida as the template in the PCR worked well.

Aug.13th

Cut pBBR1MCS-2 with restricted enzymes Xba1 and Sac1 and checked by agarose gel electrophoresis.
Result: Obvious bright bands located over 5000 bp.
After gel recovery, we got the EB solution with cut plasmid pBBR1MCS-2, but the concentration is only 6.6 ng/μl, which is still quite low.

Experiments about Bacillus subtilis

Aug.9th

Inoculated B.subtilis 168 for transformation.

Aug.10th

Plasmids of PETase and plasmid of pHP13-p43 in E.coli were isolated. Enzyme digestion using EcoR I and BamH I, then do gel extraction and then link them.

Aug.11th

The plasmids from DNA ligation were transferred into B.subtilis 168, then cultivated on chloramphenicol containing LB plates to observe whether successful.

Aug.12th

B.subtilis Transformation was observed failure，3 times.

Gene Knockout of Escherichia coli

Instead of enzyme-cut and link up, we used the overlap of each fragment to increase our aim gene(‘tet’, ‘left-right’, ‘left-tet-right’).

Week4(8/14/2016-8/20/2016)

Optimization of Culture Conditions

Aug.15th

1.Prepared 200ml W0 medium and add 0.6g sucrose, then regarded it W4 medium.
2.Extracted 8ml W4 medium to 16 test tubes, respectively.
3.Added bacteria solution as following table (use two tubes each group)

4.Cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Aug.16th

Prepared 200ml W0 medium.
2.Extracted 8ml W0 medium to 16 test tubes, respectively.
3.Added bacteria solution as following table (use two tubes each group)

4.Cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Construction of PBBR

Aug.14th

Ligation of cut pBBR1MCS-2 and CFP and Chemical transformation of pBBR into E.coli:
Ligation sites: Sac1 and Xba1

Result:
The ligation was successful, because we found the special band which represented CFP during the verification by PCR. We also successfully transformed the plasmid into E.coli which was cultured on the medium with kanamycin. However, the expression of CFP was not detected, which needed to be figure out.

Aug.15th

Cut pBBR1MCS-2 with restricted enzymes EcoR1 and Sac1 and checked by agarose gel electrophoresis:
Result: Obvious bright bands located over 5000 bp.
After gel recovery, we got the EB solution with cut plasmid pBBR1MCS-2, and the concentration is 14.7 ng/μl.

Aug.16th

Extraction of plasmid pBBR1MCS-2.

Aug.17th

Ligation of cut pBBR1MCS-2 with AcoA and AceA and Chemical transformation of pBBRAA into E.coli:
Ligation sites: Sac1 and EcoR1

Result:
The ligation was successful, because we found the special band which represented AcoA and AceA during the verification by PCR. We also successfully transformed the plasmid into E.coli which was cultured on the medium with kanamycin.

Experiments about Bacillus subtilis

Aug.14th

B.subtilis Transformation was observed failure.
Reconstruct the plasmids.

Aug.15th

E.coli transformation was observed failure.
Enzyme digestion again.
E.coli transformation again.

Aug.16th

E.coli transformation was observed failure.
Plasmid was enzyme digested and not observed correct band.

Aug.17th

Plasmids of PETase was enzyme digestion again.
Inoculate B.subtilis DB104.

Aug.19th

Inoculate E.coli of pHP13-p43.

Gene Knockout of Escherichia coli

We aimed to put the left-tet-right gene and plasmid which have λ-red gene into the the genome of E.coli. After two screening, we could gain the target strains which knocked out the atpF and atpH gene.

Week5(8/21/2016-8/27/2016)

Optimization of Culture Conditions

Aug.22th

        1.Prepared 200ml W0 medium and add 0.3g NaOAc, then regarded it W7 medium.
        2.Extracted 8ml W7 medium to 16 test tubes, respectively.
        3.Added bacteria solution as following table (use two tubes each group)

4.cultured them at 30℃ and check growing situation and the situation of TPA degradation.

Experiments about Bacillus subtilis

Aug.24th

Cultivated transformed E.coli on chloramphenicol containing LB plates to observe whether successful.

Gene Knockout of Escherichia coli

We cultivateD Saccharomyces cerevisiae and E.coli which has knocked out atpF and atpH gene and introduced GFP gene in special culture medium which the only carbon source was xylose.

Week6(8/28/2016-9/3/2016)

Experiments about Bacillus subtilis

Aug.29th

B.subtilis DB104 transformation.

Aug.30th

B.subtilis DB104 transformation is successful.

Sep.2th

Construct plamid of MHETase without success.
Transform into E.coli, in chloramphenicol containing LB culture.

Week7(9/4/2016-9/10/2016)

Experiments about Bacillus subtilis

Sep.8th

Inoculate PETase transformed B.stubtilis 168 in 3 flask culture.
1.LB, chloramphenicol, PETase transformed B.stubtilis 168, PET film.
2.LB, chloramphenicol, PETase transformed B.stubtilis 168, no PET film.
3.LB, chloramphenicol, B.stubtilis 168, PET film.

Sep.9th

Construct plamid of MHETase without success.

Sep.10th

Construct plamid of MHETase without success.

Week8(9/11/2016-9/17/2016)

Optimization of Culture Conditions

Sep.12th

Optimize the growing environment of Bacillus stubtilis by change medium components.Firstly, we prepared 400ml W medium, then, we devided the medium into four pieces averagely and number them No.1, No.2, No.3, No.4. Next, we added 0.1g NaCl, 0.1g NH4Cl, 0.3g sucrose to No.2, No.3, No.4, respectively. After that, we Extracted 5 ml No.1, No.2, No.3, No.4 and added them to four test tubes, then, we added 10 μL bacteria solution of Bacillus stubtilis 168 to four test tubes, respectively. Eventually, we cultured them at 37℃ and check growing situation.

Sep.16th

        1.Prepared 200ml W0 medium and add 0.2g NH4Cl, then regarded it W8 medium.
        2.Extracted 10ml W8 medium to 16 test tubes, respectively.
        3.Added bacteria solution as following table (use two tubes each group)

4.Cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Experiments about Bacillus subtilis

Sep.11th

Construct plamid of MHETase without success.

Sep.12th

Construct plamid of MHETase without success.

Week9(9/18/2016-9/24/2016)

Optimization of Culture Conditions

Sep.19th

1. Prepared 1L W medium and add 2.5g TPA and 1.1875g NaOH.
2. devided the medium into five pieces averagely and add chemicals as following table

3. Extracted 5ml W9, W10, W11, W12, W13 medium to 40 test tubes, respectively.
4. Added bacteria solution as following table (use two tubes each group)

5. cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Sep.21th

Repeat experiments of W9, W10 the day before yesterday.

Sep.22th

        1. Use five mediums of Sep.19th and W0, W8 medium of Sep.16th.
        2. Extracted 5ml W0, W8, W9, W10, W11, W12, W13 medium to 56 test tubes, respectively.
        3. Added bacteria solution as following table (use two tubes each group)

4. cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Sep.23th

1. Prepared 400L W medium and add 1.2g KNO3 and 1.2g glucose.
2. devided the medium into four pieces averagely and add chemicals as following table

3. Extracted 5ml W0, W14, W15, W16 medium to 34 test tubes, respectively.
4. Added bacteria solution as following table (use two tubes each group)

5. cultured them at 30℃ & 200 rpm, checked the bacterial concentration at OD₆₀₀ and detected the concentration of TPA by UV at OD₂₄₂.

Experiments about Bacillus subtilis

Sep.19th

Construct plasmid of MHETase without success.
Cultivated MHETase transformed B.stubtilis 168 on Erythromycin containing LB plates to observe, without success.

16SrDNA

Sep.19th

we firstly tried to cultivate each of them(Rhodococcus RHA1, Pseudomonas putida KT2440, bacillus subtilis 168) in LB culture medium for amplification.

Sep.21th

We use orthogonal test to prove each bacteria had each special DNA stripe from the method of bacteria colony-PCR.

Sep.22th

Then we cultivate each of them and the mixture of three in W0 culture medium for amplification.

Sep.23th

We did the same 4*3(bacteria liquid and six primer sequences) orthogonal test.

Sep.24th

We cultivate each of them and the mixture of three in in modified W0 culture medium which changed the carbon source from glucose to sugar for amplification.

Week10(9/25/2016-10/1/2016)

16SrDNA

Sep.25th

We still did the same 4*3(bacteria liquid and six primer sequences) orthogonal test.

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-		<div class="entry-title" align="center" >Notes for Microbial Consortium</div>
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 <div style="padding-left:32px;">We aimed to put the left-tet-right gene and plasmid which have λ-red gene into the the genome of E.coli. After two screening, we could gain the target strains which knocked out the atpF and atpH gene.</div>
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Difference between revisions of "Team:Tianjin/Note/Consortium"

Latest revision as of 14:13, 19 October 2016

Week1(7/24/2016-7/30/2016)

Optimization of Culture Conditions

Jul.26th

Jul.27th

Jul.28th

Jul.30th

Optimization of Culture Conditions

Jul.31th

Aug.1th

Aug.2th

Aug.3th

Aug.4th

Aug.5th

Aug.6th

Construction of PBBR

Aug.5th

Aug.6th

Gene Knockout of Escherichia coli

Week3(8/7/2016-8/13/2016)

Optimization of Culture Conditions

Aug.7th

Aug.9th

Aug.10th

Aug.12th

Aug.13th

Construction of PBBR

Aug.7th

Aug.8th

Aug.9th

Aug.11th

Aug.12th

Aug.13th

Experiments about Bacillus subtilis

Aug.9th

Aug.10th

Aug.11th

Aug.12th

Gene Knockout of Escherichia coli

Week4(8/14/2016-8/20/2016)

Optimization of Culture Conditions

Aug.15th

Aug.16th

Construction of PBBR

Aug.14th

Aug.15th

Aug.16th

Aug.17th

Experiments about Bacillus subtilis

Aug.14th

Aug.15th

Aug.16th

Aug.17th

Aug.19th

Gene Knockout of Escherichia coli

Week5(8/21/2016-8/27/2016)

Optimization of Culture Conditions

Aug.22th

Experiments about Bacillus subtilis

Aug.24th

Gene Knockout of Escherichia coli

Experiments about Bacillus subtilis

Aug.29th

Aug.30th

Sep.2th

Experiments about Bacillus subtilis

Sep.8th

Sep.9th

Sep.10th

Optimization of Culture Conditions

Sep.12th

Sep.16th

Experiments about Bacillus subtilis

Sep.11th

Sep.12th

Optimization of Culture Conditions

Sep.19th

Sep.21th

Sep.22th