Signalling

Part:BBa_M50051

Designed by: Anthony Agbay   Group: Stanford BIOE44 - S11   (2016-12-11)
Revision as of 07:43, 12 December 2016 by VivekLam (Talk | contribs)


IPTG Inducible Plasmid for the Expression of LsrR Repressor

This is a IPTG-inducible plasmid that encodes the expression of an LsrR repressor for the Lsr operon in E. coli. Although there are endogenous sources of LsrR, the plasmid allows for a controlled over-expression of protein through IPTG. This allows for the artificial control of intake of autoinducer 2(AI-2). The LsrR is a repressor for the lsr operon coding for the key components in the intake of AI-2(through membrane proteins), and its digestion in the cells. With regulation of this pathway, this should theoretically allow for control of the AI-2 quorum sensing, and in turn how cells sense each other. The promoter, the RBS, the his-tag, and the terminator were sourced through DNA 2.0. However, we have included parts from the Parts Registry in this project. The promoter is a T5 IPTG-inducible promoter that allows for the control of the expression of LuxS by varying the induction. The his-tag will allow us to test the expression through a Western blot.

Usage and Biology

LsrR is a repressor protein that inhibits the expression of the Lsr operon. By preventing the expression of the Lsr operon, LsrR reduces the intake of Autoinducer-2, an important quorum sensing molecule that is conserved throughout a wide variety of bacteria species.

Sequence and Features


Assembly Compatibility:
  • 10
    INCOMPATIBLE WITH RFC[10]
    Illegal SpeI site found at 1134
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal SpeI site found at 1134
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    INCOMPATIBLE WITH RFC[23]
    Illegal SpeI site found at 1134
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal SpeI site found at 1134
  • 1000
    COMPATIBLE WITH RFC[1000]


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Categories
Parameters
None