Signalling

Part:BBa_K658014

Designed by: Jie Chen   Group: iGEM11_XMU-China   (2011-10-02)


3OC6HSL Sender and Receiver Device with lux pR-5 Driven by PLlac 0-1

Quorum sensing is used by a number of gram-negative bacterial genera to regulate expression of specific sets of genes in a cell density-dependent fashion. We constructed the part which expresses LuxI and LuxR upon induction by isopropyl-b-D-thiogalactopyranoside (IPTG). There are two regulatory genes involved in quorum sensing, the I and R genes. The I gene directs the synthesis of an acyl-homoserine lactone (AHL) signal molecule termed the autoinducer. The R gene codes for a transcription factor that is responsive to the N-acyl HSL signal. Cells are permeable to this signal, and thus high cell densities are required to achieve a critical concentration of the autoinducer required to bind the luxR product, which will be combined with lux pR and then the expression downstream genes could be started. Site-directed mutagenesis has been used to modify the promoter lux pR in this signalling device. We have generated three point mutants by site-directed mutagenesis, designated lux pR-3 (BBa_K658006), lux pR-5(BBa_K658007) and lux pR-3/5(BBa_K658008). This signalling device is usually used to connected with some protein coding sequence,The promoter lux pR-5 (BBa_K658007) at the end of this sequence regulates the expression of downstream genes.


Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BglII site found at 718
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI.rc site found at 1874


[edit]
Categories
Parameters
controlR0011
proteinsLuxR/LuxI
signalling_moleculeAHL