This part is entirely constructed from existing parts in the registry, see their entries for more information.
This device is composed of a constituitively expressed light sensor, which produces Acetate (a chemoattractant) and AHSL, a quorum signaling molecule.
Our objective with this project, was to build something useful, using only parts available to us from the registry. If it works, we'll have succeeded!
light sensing parts from previous igem project
RBS (Elowitz 1999) -- defines RBS efficiency
Varies from -6 to +1 region from original sequence to accomodate BioBricks suffix. No secondary structures are formed in the given RBS region. Users should check for secondary structures induced in the RBS by upstream and downstream elements in the +50 to -50 region, as such structures will greatly affect the strength of the RBS. Contact info for this part: Brian Chow
Vinay S Mahajan, Voichita D. Marinescu, Brian Chow, Alexander D Wissner-Gross and Peter Carr IAP, 2003.
Positively regulated, OmpR-controlled promoter. This promoter is taken from the upstream region of ompC. Phosphorylated OmpR binds to the three operator sites and activates transcription.
The promoter includes the three OmpR binding sites: C1, C2, and C3. The promoter starts at -107 and goes up to the transcriptional start site at +1. An alternate version, BBa_R0083, cuts out the C2 and C3 sites. The efficacy of this promoter versus the truncated ompC upstream region (BBa_R0083) or the ompF upstream region (BBa_R0084) is currently unknown.
Stephen Lee, Roshan Kumar, Joe Levine, Ziyan Chu (Polkadorks, IAP 2004)
Lutz, R., Bujard, H., Nucleic Acids Research (1997) 25, 1203-1210.
Sequence for pTet inverting regulator driven by the TetR protein.
BBa_R0040 TetR-Regulated Promoter is based on a cI promoter. It has been modified to include two TetR binding sites and the BioBrick standard assembly head and tail restriction sites.
June Rhee, Connie Tao, Ty Thomson, Louis Waldman
This device accepts PoPS as input and produces the LuxI enzyme. This enzyme produces 3OC6HSL.
Assembly for J13014 by Lucy and Randy 8-05
Assembly for J13014 by Lucy and randy 8-05
Coding sequence for AspA enzyme. AspA aminates fumarate to make aspartate. Aspartate can be used as a bacterial chemotaxis signal.
The start codon was changed from GTG to ATG to match BioBricks standards. Five silent mutations were introduced to eliminate EcoRI and PstI restriction enzyme sites. EcoRI sites were eliminated at bases 588 and 657 with C -> T mutations. PstI sites were eliminated at bases 624, 999, and 1125 with G -> A mutations. The mutations were designed to match codons with similar frequencies of usage in E. coli.
Derived from the TE terminator of T7 bacteriophage between Genes 1.3 and 1.4 <genbank>V01146</genbank>.
Transcription terminator for the E.coli RNA polymerase.
Suggested by Sri Kosuri and Drew Endy as a high efficiency terminator. The 5' end cutoff was placed immediately after the TAA stop codon and the 3' end cutoff was placed just prior to the RBS of Gene 1.4 (before AAGGAG). Use anywhere transcription should be stopped when the gene of interest is upstream of this terminator.
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
Transcriptional terminator consisting of a 64 bp stem-loop.
One of two requisite genes required for the biosynthesis of phycocyanobilin from heme.
phycocyanobilin:ferredoxin oxidoreductase (PcyA) from synechocystis
Second of two required phycocyanobilin biosynthetic genes.
Chimeric Cph1 light receptor/EnvZ protein.
Silent mutation at base 108 (G-A) to remove PstI site
Conversion of the iGEM parts registry to SBOL2.1