December
Wet Lab work has not yet started.
Dry Lab work has not yet started.
15/12/15
We had our first team meeting and started with introducing us to each other. To get an overview over our background, every team member shortly described their bachelor topics. We also had a discussion on time requirements and decided that team members should only take one core module during the summer term. Furthermore, it was suggested to organize lab work in shifts. We also exchanged first ideas for possible projects and organized a meeting with Professor Stülke who wanted to present a possible project.
15/12/21
Professor Stülke and members of his lab shortly introduced a possible project from his department based on the idea of a minimal organism. After the meeting, the team members discussed the suggestion. We decided to ask other professors for different project ideas, before choosing a topic.
January
Wet Lab work has not yet started.
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16/01/08
Several team members introduced additional project ideas based on former projects and own ideas. Tobias S. agreed on asking Professor Daniel, who supervised the iGEM team 2015, for a different project.
16/01/12
Tobias S. introduced the project proposed by Professor Daniel. The project would aim at constructing a synthetic Vitamin B12 exporter and testing it in different production organisms. We also discussed advantages of this project idea compared to others.
16/01/??
Decision on the project “Vitamin B12 exporter”
16/01/18
We had the first team meeting with our supervisors discussing a rough timeline with important deadlines. Furthermore, we started planning the project funding by sponsors and internal university funding. We agreed on collecting title ideas and searching literature for Vitamin B12 binding proteins, Vitamin B12 dependent reactions and production organisms for the next meeting.
16/01/??
Deciding on title? (Facebook); organization team?
February
Wet Lab work has not yet started.
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16/02/01
We decided to design and print a booklet on our project to send it to possible sponsors. Amongst others, information on the iGEM competition, the background to our project, the team and sponsoring suggestions should be included. The topics were divided between team members. The organization team agreed on writing the email text and the text for a letter to address sponsors.
16/02/15
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16/02/29
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March
Wet Lab work has not yet started.
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16/03/03
Together with the supervisors, we decided on the three production organisms Salmonella typhimurium TA100, Klebsiella planticola and Escherichia blattae to test the constructs for Vitamin B12 exporters. We did not yet choose different B12 binding proteins, which can be used in the exporter. Further literature research is needed for that. However, we already discussed possible experiments to test the B12 productivity in the production organisms in the end. Those include a photometric, a biological and an antibody assay.
The strains for our production organisms have to be ordered from DSMZ. For a biological assay we also have to search for a B12 auxotrophic strain and a B12-free medium.
16/03/11
?
16/03/18
We registered the team for the IDT website to use their offer for iGEM teams to synthesize our constructs.
16/03/29
Decision on constructs?
April
Week 1:
- Antibiotic resistance:
After having received our production strains S. blattae, R. planticola and S. typhimurium TA 100 we could start lab work with testing them for natural antibiotic resistances. For this, they were grown in culture overnight and plated on LB-Agar plates supplemented with different antibiotics.
Week 2:
- Antibiotic resistance:
Due to inconsistent results in the week before, the test for antibiotic resistances had to be repeated. We additionally tested for resistance against chloramphenicol and used more different concentrations of the antibiotics and dilutions of the pre-cultures. The results showed, that all production strains have no antibiotic resistance for kanamycin. It can therefore be used as antibiotic resistance on our plasmids. - Bacterial identification:
To check the identification of our production strains, we performed a 16S rRNA PCR. All strains were correct, so glycerol stocks could be prepared. - Competent cells:
For the following experiments, we had to prepare electro competent cells of our productions strains and E. coli DH5α. This was done first for E. coli DH5α and S. typhimurium TA100 according to protocol.
Week 3:
- Competent cells:
Electrocompetent cells for S. blattae and R. planticola were prepared.
Week 4:
- Test transformation:
To check if our prepared electro competent cells were indeed electro competent, we transformed them with a simple vector containing a kanamycin resistance according to protocol and grew them on plates over night. Unfortunately, only E. coli DH5α showed resistance against kanamycin, suggesting that the transformation or the preparation of competent cells was not successful for the others.
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16/04/01
We planned the first steps, which needed to be taken in the lab. We have to grow the strains, make the cells electro competent, proof their identity via 16S PCR and check for possible antibiotic resistances.
More research is needed on the TAT secretion system and possible export signals, as well as possible vector systems. It was decided that they should be inducible by arabinose, suggesting the pBAD vector system.
16/04/11: team, supervisors
After discussing the first results from the lab concerning the antibiotic resistances, it was decided to repeat the experiments with chloramphenicol as additional antibiotic and using different concentrations.
For the following weaks, the team was devided into three groups, one testing antibiotic resistace again, one starting to prepare electro competent cells and the third team working on designing the constructs.
We also agreed on having a regular iGEM meeting with the supervisors every two weeks on Monday, 11 am. Furthermore, the organization team will start writing guide lines for lab work and Ines will organize a log book for signing in lab working hours.
Arrival of iGEM package?
Arrival of constructs?
16/04/25
The results for the antibiotic resistance testing were discussed and it was decided to test the competence of electro competent cells with kanamycin (kan) as antibiotic and a kan-vector provided by the lab.
Tobias S. is in contact with Thermo Fisher for the order of our pBAD vector system.
Ines and Larissa will send out letters with our booklet to potential sponsors. Furthermore, we decided that all team members will participate in Marburg at the meeting for iGEM teams from Germany. Tobias S. organizes the registration.
To respresent iGEM, Miriam will contact the “Göttinger Tageblatt”, Ines, Tobias K., Tobias S. and Alexander will participate as a team at the “Göttinger Altstadtlauf” and Tobias S. Tobias K. and Miriam will present iGEM and our project at a “Bier und Brezeln” presentation.
May
Week 1:
- No wet lab work done.
Week 2:
- Test transformation:
The previously prepared cells of our production strains were again tested for electro competence. The protocol was slightly changed using SOC medium instead of LB-medium and incubating the bacteria at their temperature optima (R. planticola: 30 °C, others: 37 °C). However, the cells again did not grow, showing that they were not electro competent.
Week 3:
- Preparation:
For the following week, large amounts of media had to be prepared.
Week 4:
- Competent cells:
The preparation of competent cells was repeated for S. blattae, R. planticola and S. typhimurium TA 100. The cells were again incubated at their respective temperature maxima.
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16/05/09
We decided to join the meeting of the European iGEM teams in Paris and will book bus tickets and the hotel rooms in the following days.
After the meeting, we took pictures with the T-shirts provided by Zymo Research to post it on our facebook profile.
16/05/18
We discussed the final design for out T-Shirts and possible offers for printing them.
We also want to present our project and iGEM at the “GZMB Sommerfest”. In return, we will offer our support in organizing the event.
Concerning lab work, the transformation of our constructs can start as the vector from Thermo Fisher has arrived.
16/05/23
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16/05/30: TS, TK, AB, NE, ME, LK, MS, supervisors
We discussed the problems in lab work and worked out a schedule for the following weeks. We will test the electro competent cells and if necessary repeat the preparation.
June
Week 1:
- No wet lab work done.
Week 2:
- Test transformation:
The newly prepared electro competent cells were tested and compared with a test transformation of cells provided by our supervisor Genis. Only the S. blattae cells showed antibiotic resistance.
- MutB construct:
After having received the synthesized constructs from IDT, we could start to prepare the constructs. MutB had to be ordered with a restriction site and synthesized in two fragments due to its length. Therefore, it had to be digested with HindIII, purified and ligated.
Week 3:
- Competent cells:
The preparation of electro competent cells was repeated for R. planticola and S. typhimurium TA 100 and test transformations with a simple kanamycin vector were successful.
- MutB construct:
The ligation of the two fragments was repeated. Additionally, the synthesized MutB1 and MutB2 fragments were amplified by PCR, followed by gel electrophoresis and gel extraction to prepare a stock.
Week 4:
- MutB construct:
The amplified MutB fragments were digested with HindIII, purified and ligated. However, gel electrophoresis showed that none of the ligations worked yielding products of wrong sizes.
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July
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August
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September
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Katzen liegen nicht faul rum. Sie verschönern den Raum.
October
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Katzen liegen nicht faul rum. Sie verschönern den Raum.
Katzen liegen nicht faul rum. Sie verschönern den Raum.
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