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. 1967 Jan;93(1):71–79. doi: 10.1128/jb.93.1.71-79.1967

Mode of Action of Novobiocin in Escherichia coli

David H Smith a,1, Bernard D Davis a
PMCID: PMC314970  PMID: 5335903

Abstract

The mechanism of action of novobiocin was studied in various strains of Escherichia coli. In all strains tested except mutants of strain ML, the drug immediately and reversibly inhibited cell division, and later slowed cell growth. The previously described impairment of membrane integrity, degradation of ribonucleic acid (RNA), and associated bactericidal effect were found to be peculiar to ML strains. The earliest and greatest effect in all strains was an inhibition of deoxyribonucleic acid (DNA) synthesis; RNA synthesis was inhibited to a lesser extent, and cell wall and protein synthesis were affected later. The inhibition of nucleic acid synthesis was accompanied by an approximately threefold accumulation of all eight nucleoside triphosphates. Since novobiocin does not inhibit nucleoside triphosphate synthesis, degrade DNA, or immediately affect energy metabolism, it must inhibit the synthesis of DNA and RNA by direct action on template-polymerase complexes.

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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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