Construction and characterization of a mercury-independent MerR activator (MerRAC): transcriptional activation in the absence of Hg(II) is accompanied by DNA distortion.

@article{Parkhill1993ConstructionAC,
  title={Construction and characterization of a mercury-independent MerR activator (MerRAC): transcriptional activation in the absence of Hg(II) is accompanied by DNA distortion.},
  author={Julian 5 Parkhill and Aseem Z Ansari and James G. Wright and Nigel L. Brown and Thomas V O'Halloran},
  journal={The EMBO journal},
  year={1993},
  volume={12 2},
  pages={413-21}
}
The MeR regulatory protein of transposon Tn501 controls the expression of the mercury resistance (mer) genes in response to the concentration of mercuric ions. MerR is unique among prokaryotic regulatory proteins so far described in that it acts as a repressor [-Hg(II)] and an activator [+Hg(II)] of transcription of the mer genes, but binds to a single site on the DNA in both cases. This transcriptional activation process has been postulated to involve a protein-induced conformational change in… CONTINUE READING

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