TMT (trimethylamine transferase) takes part in the third reaction of the production of TMA (trimethylamine) which is the major cause of unpleasant fish odor. We added Lux cassette right promoter that up-regulated by HSL and LuxR in the course of being able to regulate easily. We intended to generate a negative feedback response with the help of producing LuxR and HSL and activating the promoter with them.
V. fischeri <genbank>AF170104</genbank>
Synthesizes 3OC6HSL, which binds to LuxR. 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 Lux repressor, LuxR. Two molecules of LuxR protein form a complex with two molecules the signalling compound HSL. This complex binds to a palindromic site on the promoter, increasing the rate of transcription.
An LVA tail (sequence: AANDENYALVA) was added to increase protein degradation. .
Vinay S Mahajan, Voichita D. Marinescu, Brian Chow, Alexander D Wissner-Gross and Peter Carr
In complex with HSL, LuxR binds to the Lux promoter, activating transcription from Pr <bb_part>BBa_R0062</bb_part>, and repressing transcription from Pl <bb_part>BBa_R0063</bb_part>. 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 Lux activator, LuxR complexed to HSL. Two molecules of LuxR protein form a complex with two molecules the signalling compound homoserine lactone (HSL). This complex binds to a palindromic site on the promoter, increasing the rate of transcription.
2 silent point mutants were introduced in the coding sequence to remove internal XbaI and PstI sites. Mutation sites were chosen to replace codons commonly used in E. coli with codons used at a similar frequency.
Promoter (luxR & HSL regulated -- lux pL)
The lux cassette of V. fischeri contains a left and a right promoter. The left promoter gives weak constitutive expression of downstream genes.This expression is down-regulated by the action of the Lux repressor, LuxR. Two molecules of LuxR protein form a complex with two molecules the signalling compound homoserine lactone (HSL). This complex binds to a palindromic site on the promoter, increasing the rate of transcription from Pr, repressing transcription from Pl
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.Includes most of Lux reulatory region, including the LuxR binding site which activates the right promoter. A putative LuxR autorepression binding site is also identified adjacent to the -10 site of the right promoter. This 2nd site has 55% identity with the first site. Putative inverted repeats (of size 18-27 bp) also exist between these two sites (not marked above), which may represent binding sites for other regulatory proteins. <img src="<bb_file>Image01.gif</bb_file>" width="614" height="362"> Unspecified.
MMT (monomethylamine transferase) catalyses the first reaction of TMA (trimethylamine) synthesis. TMA is the major cause of unpleasant fish odor. For additional information: http://2012hs.igem.org/Team:AUC_Turkey/Project/TMA
DMT (monomethylamine transferase) catalyses the second reaction of TMA (trimethylamine) synthesis. TMA is the major cause of unpleasant fish odor.
TMT (trimethylamine transferase) takes part in the third reaction of the production of TMA (trimethylamine) which is the major cause of unpleasant fish odor.
Conversion of the iGEM parts registry to SBOL2.1