Pcons2, lacI, Plac, luxI, Pcons2, luxR, Prlux, rfp, Ter
Plasmid in positive feedback verification: Pcons2-rbs-lacI-Ter-Plac-rbs-luxI-Ter-Pcons2-rbs-luxR-Ter-Prlux-rbs-rfp-Ter. It is a control plasmid for positive feedback circuit. It will produce rfp when there is enough IPTG.
Prlux-rbs-rfp-Ter. It produces rfp when there is enough luxR and AHL.
Pcons2-rbs-lacI-Ter-Plac-rbs-luxI-Ter It produces luxI when there is enough IPTG.
Promoter (luxR & HSL regulated -- lux pR)
Promoter activated by LuxR in concert with HSL The lux cassette of V. fischeri contains a left and a right promoter. The right promoter gives weak constitutive expression of downstream genes.This expression is up-regulated by the action of the LuxR activator protein complexed with the autoinducer, 3-oxo-hexanoyl-HSL. Two molecules of LuxR protein form a complex with two molecules of the signalling compound homoserine lactone (HSL). This complex binds to a palindromic site on the promoter, increasing the rate of transcription.
This promoter is based on the Vibrio fischeri quorum sensing gene promoters. Two genes LuxI and LuxR and transcribed in opposite directions as shown below. The original sequence from which the parts <bb_part>BBa_R0062</bb_part> and <bb_part>BBa_R0063</bb_part> were derived is shown in the picture below. <img src="<bb_file>Image1.gif</bb_file>" width="614" height="362">
Vinay S Mahajan, Voichita D. Marinescu, Brian Chow, Alexander D Wissner-Gross and Peter Carr
Pcons2-rbs-luxR-Ter. It achieves a constant expression of luxR, the AHL combining protein Pcons2 is BBa_J23100
Pcons2-rbs-lacI-Ter. It constantly produces lacI.
Plac-rbs-luxI-Ter. It produces luxI when there is enough IPTG or less lacI.
The Plac insert was PCR'd from the MG1655 strain of E.coli K12.
Inverting regulatory region controlled by LacI (<bb_part>BBa_C0010</bb_part>, <bb_part>BBa_C0011</bb_part>, etc.) The pLac regulatory region is a 243 base-pair sequence with standard BioBrick prefix and suffix sections on its ends. It contains two protein binding sites: CAP, which is generally present in E.coli and is assocciated with cell health and availability of glucose., and LacI, the Lac inhibitor <bb_part>BBa_C0010</bb_part> which binds in an dimerized cooperative manner to inhibit the transcription of the protein that follows. In the presence of lactose or IPTG, an analog of lactose, LacI is unable to correctly bind and inhibit transcription. This allows <bb_part>BBa_R0010</bb_part> to be used as a inverter or as a detector of lactose or IPTG.
LacI binds to this regulator. This part is incompatible with species containing active LacI coding regions. Lactose and IPTG disable the operation of LacI and this regulator. This part is incompatible with environments containing lactose or lactose analogs.
It is an improvement of lacI by adding a rbs.
Rbs-lacI(scarless) It is an improvement of lacI by adding a rbs.
It is an improvement of luxI(BBa_C0061) by adding a rbs.
Rbs-luxI(scarless) It is an improvement of luxI(BBa_C0061) by adding a rbs.
Conversion of the iGEM parts registry to SBOL2.1