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- W2076809355 abstract "Summary RelE and ChpAK (MazF) toxins of Escherichia coli have previously been described as proteins that mediate efficient cell killing. We show here that induction of relE or chpAK transcription does not confer cell killing but, instead, induces a static condition in which the cells are still viable but unable to proliferate. Later induction of transcription of the antitoxin genes relB or chpAI fully reversed the static condition induced by RelE and ChpAK respectively. We also provide a mechanistic explanation for these findings. Thus, induction of relE transcription severely inhibited translation, whereas induction of chpAK transcription inhibited both translation and replication. Hence, most likely, lack of colony formation is due to inhibition of translation in the case of relE and inhibition of translation and/or replication in the case of chpAK . Consistent with this proposal, later induction of transcription of the cognate antitoxin genes simultaneously reversed cell stasis and the inhibitory effects of RelE and ChpAK on macromolecular syntheses. These results preclude that RelE and ChpAK mediate cell killing during the conditions used here. In vivo and in vitro analyses of a mutant RelE protein supported that inhibition of colony formation was due to inhibition of translation." @default.
- W2076809355 created "2016-06-24" @default.
- W2076809355 creator A5044537478 @default.
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- W2076809355 date "2002-07-01" @default.
- W2076809355 modified "2023-10-15" @default.
- W2076809355 title "Rapid induction and reversal of a bacteriostatic condition by controlled expression of toxins and antitoxins" @default.
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- W2076809355 doi "https://doi.org/10.1046/j.1365-2958.2002.03027.x" @default.
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