Effect of σS on σE-Directed Cell Lysis in Escherichia coli Early Stationary Phase
- 1 January 2004
- journal article
- Published by S. Karger AG in Microbial Physiology
- Vol. 8 (3) , 189-194
- https://doi.org/10.1159/000085791
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.Keywords
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