Nitrite and nitrate regulation at the promoters of two Escherichia coli operons encoding nitrite reductase: identification of common target heptamers for both NarP- and NarL-dependent regulation.

@article{Tyson1994NitriteAN,
  title={Nitrite and nitrate regulation at the promoters of two Escherichia coli operons encoding nitrite reductase: identification of common target heptamers for both NarP- and NarL-dependent regulation.},
  author={K. L. Tyson and Jeff A. Cole and Stephen J W Busby},
  journal={Molecular microbiology},
  year={1994},
  volume={13 6},
  pages={1045-55}
}
Expression from both the Escherichia coli nir and nrf promoters is dependent on anaerobic induction by FNR but is further regulated by NarL and NarP in response to the presence of nitrite and nitrate in the growth medium. The nir promoter is activated by NarL in response to nitrate and nitrite and activated by NarP in response to nitrate but not nitrite. The effects of point mutations suggest that NarL and NarP both bind to the same target, which is a pair of heptamer sequences organized as an… CONTINUE READING
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