1932

Abstract

The phage shock protein (Psp) system was identified as a response to phage infection in , but rather than being a specific response to a phage, it detects and mitigates various problems that could increase inner-membrane (IM) permeability. Interest in the Psp system has increased significantly in recent years due to appreciation that Psp-like proteins are found in all three domains of life and because the bacterial Psp response has been linked to virulence and other important phenotypes. In this article, we summarize our current understanding of what the Psp system detects and how it detects it, how four core Psp proteins form a signal transduction cascade between the IM and the cytoplasm, and current ideas that explain how the Psp response keeps bacterial cells alive. Although recent studies have significantly improved our understanding of this system, it is an understanding that is still far from complete.

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2016-09-08
2024-04-25
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