PMID:16088220

Citation	Kabir, MS, Yamashita, D, Noor, R and Yamada, M (2004) Effect of sigmaS on sigmaE-directed cell lysis in Escherichia coli early stationary phase. J. Mol. Microbiol. Biotechnol. 8:189-94
Abstract	The sigmaE regulon has been shown to perform a novel function that causes dead-cell lysis specific to the early stationary phase in addition to its well-known role in the extracytoplasmic stress response in Escherichia coli. Here, the effect of sigmaS as a general stress-responsive sigma factor on sigmaE-directed cell lysis was investigated. The lysis phenomena were observed in both rpoS mutant and parental strains constitutively expressing active sigmaE, but the former lysis occurred at a relatively early stage compared to the latter. Based on these results and experiments with hydrogen peroxide, we propose that some stresses generate living but non-culturable cells, which are subject to sigmaE-directed cell lysis.
Links	PubMed Online version:10.1159/000085791
Keywords	Bacterial Proteins/genetics; Bacterial Proteins/physiology; Cell Proliferation; Escherichia coli/genetics; Escherichia coli/growth & development; Escherichia coli/physiology; Escherichia coli Proteins/genetics; Escherichia coli Proteins/physiology; Hydrogen Peroxide/pharmacology; Mutation; Oxidative Stress; Regulon; Sigma Factor/genetics; Sigma Factor/physiology
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