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. 1977 Apr;130(1):107–113. doi: 10.1128/jb.130.1.107-113.1977

Regulation of ribonucleoside diphosphate reductase synthesis in Escherichia coli: increased enzyme synthesis as a result of inhibition of deoxyribonucleic acid synthesis.

D Filpula, J A Fuchs
PMCID: PMC235179  PMID: 67110

Abstract

Inhibition of deoxyribonucleic acid (DNA) synthesis in Escherichia coli by chemical inhibitors or by shifting cultures of temperature-sensitive elongation (dnaE and dnaB) or initiation (dnaA) mutants to nonpermissive conditions led to greatly increased synthesis of the enzyme ribonucleoside diphosphate reductase, which catalyzes the first reaction unique to the pathway leading to DNA replication. In contrast to the Gudas and Pardee proposed model for control of the synthesis of DNA repair enzymes, in which both DNA inhibition and DNA degradation are involved, DNA synthesis inhibition in recA, recB, recC, or lex strains results in increased synthesis of ribonucleotide reductase, which suggests that DNA degradation is not required. We propose that inhibition of DNA synthesis causes a cell to accumulate an unknown compound that stimulates the initiation of a new round of DNA replication, and that this same signal is used to induce ribonucleotide reductase synthesis.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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