Difference between revisions of "Part:BBa K3265026"
Line 43: | Line 43: | ||
This picture was taken 10 hours past induction, the signal does not seem very strong but there were a moderate number showing micrompartments. <br><br> | This picture was taken 10 hours past induction, the signal does not seem very strong but there were a moderate number showing micrompartments. <br><br> | ||
− | https://static.igem.org/mediawiki/parts/thumb/d/da/T--UZurich--gold_improved_kek.png/ | + | https://static.igem.org/mediawiki/parts/thumb/d/da/T--UZurich--gold_improved_kek.png/320px-T--UZurich--gold_improved_kek.png.jpeg |
− | The control was also imaged: <br><br> | + | <br><br><br> |
+ | The control was also imaged: <br><br><br> | ||
https://static.igem.org/mediawiki/parts/5/5c/T--UZurich--gold_uninduced_kek.png | https://static.igem.org/mediawiki/parts/5/5c/T--UZurich--gold_uninduced_kek.png |
Revision as of 07:55, 19 October 2019
EutSMN bacterial microcompartment
This is an improved version of part BBa_K2213012 from team Manchester 2017. We down-regulated the base expression by exchanging the RBS to a the very weak RBS J61100. EDIT
Usage and Biology
Characterization
To test if our part could now produce the EutM and EutN proteins at levels low enough so that it would not be toxic to the cells anymore, we redid the OD measurement with the original EutSMN part.
Procedure
100mL LB cultures were inculcated with a single colony from an overnight transformation of pSEVA441 vector carrying our improved EutSMN part. E. coli strain DH5alpha was used.
Cultures were grown for 4 hours at 37° 300 rpm and then induced with 4.5 ng/mL Anhydrotetracylcine (ATC) or 45 ng/mL Tetracycline (Tetc) and 1mM Arabinose ((+)araB) each. One culture was not induced (control).
All concentrations are to be interpreted as final concentrations in the liquid culture. 45 ng/mL Tetc/ATC = 0.1 uM
Measurements were taken each hour for 9 hours and a final measurement was taken after 20 hours.
Results
It seems that our very weak RBS J61001 is doing a good job at keeping the base expression levels low enough so that not a lot of the protein is produced.
Imaging
We confirmed with imaging that the protein is produced at high enough levels to form compartment:
This picture was taken 10 hours past induction, the signal does not seem very strong but there were a moderate number showing micrompartments.
The control was also imaged:
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12INCOMPATIBLE WITH RFC[12]Illegal NheI site found at 1293
- 21INCOMPATIBLE WITH RFC[21]Illegal BamHI site found at 1232
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 1067
Illegal AgeI site found at 3824 - 1000INCOMPATIBLE WITH RFC[1000]Illegal BsaI.rc site found at 3212