Article
Role of His243 in the phosphatase activity of EnvZ in Escherichia coli.
Journal of bacteriology - 1 Feb 1997
Skarphol K, Waukau J, Forst S A
Abstract excerpt
EnvZ undergoes autophosphorylation at His243 and subsequently transfers the phosphate group to OmpR. EnvZ also possesses an OmpR-phosphate phosphatase activity. We examined the role of His243 in the phosphatase function by replacing His with either Val, Tyr, Ser, Asp, or Asn. EnvZH243V and EnvZH243Y were both shown to possess phosphatase activity in vitro. In addition, the mutant proteins were able to reduce the...
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