Genetic evidence that transcription activation by RhaS involves specific amino acid contacts with sigma 70.

@article{Bhende2000GeneticET,
  title={Genetic evidence that transcription activation by RhaS involves specific amino acid contacts with sigma 70.},
  author={Prassana M Bhende and Susan M. Egan},
  journal={Journal of bacteriology},
  year={2000},
  volume={182 17},
  pages={4959-69}
}
RhaS activates transcription of the Escherichia coli rhaBAD and rhaT operons in response to L-rhamnose and is a member of the AraC/XylS family of transcription activators. We wished to determine whether sigma(70) might be an activation target for RhaS. We found that sigma(70) K593 and R599 appear to be important for RhaS activation at both rhaBAD and rhaT, but only at truncated promoters lacking the binding site for the second activator, CRP. To determine whether these positively charged sigma… CONTINUE READING

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