The Escherichia coli phage‐shock‐protein (psp) operon
- 1 April 1997
- journal article
- review article
- Published by Wiley in Molecular Microbiology
- Vol. 24 (2) , 255-261
- https://doi.org/10.1046/j.1365-2958.1997.3481712.x
Abstract
The phage-shock-protein (psp) operon helps to ensure survival of Escherichia coli in tate stationary phase at alkaline pH, and protects the cell against dissipation of its proton-motive force against challenge. It is strongly induced by filamentous phage pIV and its bacterial homologues, and by mutant porins that don't localize properly, as well as by a number of other stresses. Transcription of the operon is dependent on sigma(54) and a constitutively active, autogenously controlled activator. psp-operon expression is controlled by one negatively and several positively acting regulators, none of which is a DNA-binding protein. The major product of the operon, PspA, may also serve as a negative regulator of an unusual porin, OmpG.This publication has 10 references indexed in Scilit:
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