Coding

Part:BBa_K1132017:Design

Designed by: iGEM Toulouse   Group: iGEM13_INSA_Toulouse   (2013-09-20)


For the characterisation of the red light responsive system, under tetR regulation


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 7
    Illegal NheI site found at 30
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BglII site found at 1611
    Illegal XhoI site found at 3815
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal NgoMIV site found at 1164
    Illegal AgeI site found at 3165
    Illegal AgeI site found at 3277
  • 1000
    COMPATIBLE WITH RFC[1000]


Design Notes

Chimeric Cph1 light receptor/EnvZ (Cph8) protein requires phycocyanobilin (PCB) biosynthetic genes for PCB formation (ho1 and PcyA). The exposure to red light (660nm) inhibits the activity of the EnvZ histidine kinase domain. In the dark, the EnvZ histidine kinase phosphorylates endogenous OmpR, a transcription factor which activates transcription from the OmpC promoter. This part must be used in E.coli deficient in wild-type EnvZ.

The heme oxygenase (ho1), ferredoxin oxidoreductase (PcyA) and tetracycline repressor (TetR) are under a constitutive promoter. Ho1 and PcyA are genes required for phycocyanobilin (PCB) biosynthesis and TetR binds to the p(TetR) (Part:BBa_R0040) that regulated light sensor (Cph8). aTc (anhydrotetracycline) binds to TetR and allows Cph8 production.

The RFP is positively regulated by OmpR-controlled promoter. Phosphorylated OmpR binds to the operator sites and activates transcription of RFP. This is a test Biobrick for the red light responsive system with the RFP protein as output.



Source

later

References