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Revision as of 08:52, 17 October 2018


CotA Laccase of B.subtilis

CotA Laccase is an endospore type protein secreted from B.subtilis

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal AgeI site found at 1348
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal SapI.rc site found at 286

Period - CsgA - SpyTag

<img src="T--SHSBNU_China--21000.png" style="width 100%"/></image>

Gene csgA found in the genome of MG1655 wild type is capable of forming biofilm. Using CRISPR, we knocked out gene csgA on MG1655’s genome creating ΔMG1655 strain. The cell ΔMG1655 would then be used as chassis cell. Gene csgA was fused into plasmid pET28a. A Spytag sequence was then fused after csgA gene, creating csgA-spycatcher (BBa_K2684006).

<img src="T--SHSBNU_China--21001.jpg" style="width 100%"/></image>

Reaction stock leftover in experiment

Using sfGFP – spycatcher protein, the combing function of Spytag and spycatcher system on the biofilm was tested. Gene csgA on the plasmid of pET28a was transferred in to ΔMG1655 as control group. Gene csgA – Spytag on the plasmid of pET28a was transferred in to ΔMG1655 as experiment. To verify the function of Spytag on csgA, the experiment was design to compare the combing rate of sf-GFP – spycatcher protein with cells that have csgA – SpyTag (Experiment) or csgA (Control).

<img src="T--SHSBNU_China--21002.jpg" stule="width 100%"/></image>

Link: Protocol for <a href="http://2018.igem.org/Team:SHSBNU_China/Protocal#SSS">SpyTag-SpyCatcher</a> system verification

As can be seen from the result,

Thus we can confirm our csgA – SpyTag system is functional.

References

Guan, Z.-B., Luo, Q., Wang, H.-R., Chen, Y., & Liao, X.-R. (2018). Bacterial laccases: promising biological green tools for industrial applications. Cellular and Molecular Life Sciences.