Part:BBa_K352005

C4G Mutated pCooF From Rhodospirillum rubrum

This part is the mutated version of pCooF promoter. The mutation involves conversion cytosine to guanine at fourth base. The binding strength of pCooF to CooA is expected to diminish.

CooA is a CO-sensing protein that activates the transcription of genes encoding the CO-oxidation (coo) regulon, whose polypeptide products are required for utilizing CO as an energy source in Rhodospirillum rubrum. CooA binds to a position overlapping the 35 element of the P(cooF) promoter, similar to the arrangement of class II CRP (cAMP receptor protein)and FNR (fumarate and nitrate reductase activator protein)-dependent promoters when expressed in Escherichia coli. The CO-dependent anaerobic growth of Rhodospirillum rubrum relies on a CO oxidation system encoded by two CO regulated transcriptional units, cooMKLXUH and cooFSCTJ. The key products of the coo regulon are an O2- sensitive CO dehydrogenase (CooS), a CooS-associated Fe-S protein (CooF), and a CO-tolerant hydrogenase (CooH), and the expression of the genes depends upon the activity of the CooA protein, which senses CO under anaerobic conditions.

CO-independent basal level transcription of PcooF is not detectable due to the absence of active CooA.

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]