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. 1976 Dec;73(12):4474–4478. doi: 10.1073/pnas.73.12.4474

Novobiocin and coumermycin inhibit DNA supercoiling catalyzed by DNA gyrase.

M Gellert, M H O'Dea, T Itoh, J Tomizawa
PMCID: PMC431506  PMID: 794878

Abstract

Novobiocin and coumermycin are known to inhibit the replication of DNA iing of DNA catalyzed by E. coli DNA gyrase, a recently discovered enzyme that introduces negative superhelical turns into covalently circular DNA. The activity of DNA gyrase purified from a coumermycin-resistant mutant strain is resistant to both drugs. The inhibition by novobiocin of colicin E1 plasmid DNA replication in a cell-free system is partially relieved by adding resistant DNA gyrase. Both in the case of coliclls. DNA molecules which are converted to the covalently circular form in thepresence of coumermycin remain relaxed, instead of achieving their normal supercoiled conformation. We conclude that DNA gyrase controls the supercoiling of DNA in E. coli.

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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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