Part:BBa_K4767015

PluxⅠ-RBS-luxR(△2-162)-TT

Uses a factor P_luxⅠ(BBa_R0062) ,strong RBS(BBa_J34801), luxR(△2-162)(BBa_K4767000), and TT(BBa_B0015). This composite part is a BioBrick.

Usage and Biology

In order to construct a positive feedback circuit which does not require 3OC6HSL produced by LuxI, we engineered LuxR by deleting 2-262 amino acids in the N-terminal domain (AHL binding domain) and reserving a C-terminal domain with the function of activating transcription, obtaining a resulting regulator LuxR(△2-162). LuxR(△2-162) can active the gene transcription driven by the lux promoter in the absence of AHL. To construct the amplifier, we cloned LuxR(Δ2-162) behind the lux promoter. In this design, LuxR(Δ2-162) functions in a positive feedback loop as it can bind to the P_luxⅠ promoter and activate its own transcription.

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  COMPATIBLE WITH RFC[1000]

References

Nistala, G.J., et al., A modular positive feedback-based gene amplifier. J Biol Eng, 2010. 4: p. 4.