Interference of Dna Ts Mutations of Escherichia Coli with Thymineless Death

Overview

Journal J Bacteriol

Publisher American Society for Microbiology

Specialty Microbiology

Date 1975 Dec 1

PMID 1104577

Citations 15

Authors

F Bouvier

N Sicard

Affiliations

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Abstract

Thermosensitive mutants of Escherichia coli in which deoxyribonucleic acid replication is inhibited at high temperature have been assayed for their response to thymine deprivation at permissive and nonpermissive temperatures. The survival rate of mutants in which initiation of replication is defective at 42 C (dnaA and dnaC-D) is much higher at nonpermissive temperatures than at 32 C. By contrast, thymineless death is not hindered at 42 C in two elongation mutants (dnaE and dnaG). Bacterial strains belonging to the dnaB class exhibit both types of behavior. These results are in accordance with the model linking thymineless death to a disruption of an active replication fork. We discuss the possibility that the dnaB protein takes part in this process of cell decay.

Citing Articles

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A balanced perspective on unbalanced growth and thymineless death.

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