Source:
Generated By: https://synbiohub.org/public/igem/igem2sbol/1
Created by: Lovelace Soirez
Date created: 2007-10-22 11:00:00
Date modified: 2015-08-31 04:08:04
I746101 (AIP sensor infrastructure) + I746105 (Inducible P2 + GFP reporter)
| Types | DnaRegion |
| Roles | engineered_region Signalling |
| Sequences | BBa_I746107_sequence (Version 1) |
Description
This part is the AIP sensor infrastructure (I746101) from the agr system with an AIP-inducible promoter P2 and GFP reporter (I746105) downstream.A constitutive/inducible promoter may be added upstream of this part, which will cause production of the components of the signal transduction pathway (AgrC and AgrA); when phosphorylated AgrA is present, the AIP-sensitive promoter (P2) is activated and GFP (E0840) is output.
The original part was made in order to transfer the S. aureus oligopeptide-based quorum sensing system into a BioBrick-compatible signalling mechanism.
In the natural system, the signalling oligopeptide (termed AIP) is made from AgrD by the membrane-located enzyme AgrB. It is then detected by the membrane-located AgrC, which phosphorylates AgrA which then has DNA-binding activity and upregulates transcription of the promoters termed P2 and P3 in the agr locus. There are four known variants of AIP with different molecular structures and cross-inhibitory activity; this BioBrick generates group I AIP.
The agr P2 operon is an autocatalytic sensory transduction system in Staphylococcus aureus. P2 promoter regulates the synthesis of AgrB (a transmembrane protein) and AgrD (precursor of AIP autoinducing peptide). AIP binds to AgrC, a membrane binding receptor and it phosphorylates AgrA. The phosphorylated AgrA increases the activity of agr P2 promoter about 50-fold.
Notes
N/ASource
The original sequences for agrC and agrA were taken from the S. aureus Sequencing Project (results for strain NCTC8325) at Oklahoma University (http://www.genome.ou.edu/staph.html). The sequences were then codon-optimised for E. coli using GeneDesigner from DNA2.0 (http://www.dna20.com), and then synthesised by that company.| Access | Instance | Definition |
| public public public public public public public public | BBa_I746100 BBa_B0010 BBa_B0012 BBa_I746104 BBa_B0030 BBa_E0040 BBa_B0010 BBa_B0012 | BBa_I746100 BBa_B0010 BBa_B0012 BBa_I746104 BBa_B0030 GFP BBa_B0010 BBa_B0012 |