Regulatory
RhlR+C4

Part:BBa_R0071

Designed by: Ronny Krashinsky   Group: Antiquity   (2004-01-24)


Promoter (RhlR & C4-HSL regulated)

Promoter activated by RhlR in concert with C4-HSL. C4-HSL is produced by RhlI, and acts as a quorum-sensing autoinducer.

This is the natural sequence taken from Pseudomonas aeruginosa.

Crosstalk: this promoter is also activated at a low level by LasR with its associated HSL.


Usage and Biology

RhlR binds to the promoter region and activates transcription when in the presence of its autoinducer -- N-butyryl-homoserine lactone (also known as C4-HSL), which is produced by RhlI.

From [Medina03]: <i>... RhlR binds to this DNA sequence, both in vivo and in vitro, in the presence and in the absence of C4-HSL. The binding of RhlR(C4-HSL) to the las box is a necessary condition for rhlAB expression while the binding of RhlR alone to the same DNA sequence seems to repress rhlAB transcription.</i>

From [Medina03]: <i>The LasR(3-O-C12-HSL) complex can activate rhlAB promoter expression but at a considerably lower level than the RhlR(C4-HSL) complex.</i>

From the data in [Medina03], LasR activates rhlAB at 7.8% of the activation level achieved by RhlR.

From the data in [Pearson97], the activation by LasR is about 3% of that by RhlR.


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
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]


[edit]
Categories
//rnap/prokaryote/ecoli/sigma70
//direction/forward
//chassis/prokaryote/ecoli
//promoter
//regulation/positive
//classic/regulatory/uncategorized
//function/cellsignalling/RhlR
Parameters
biology
directionForward
negative_regulators
positive_regulators1