GyrB mutations in Staphylococcus aureus strains resistant to cyclothialidine, coumermycin, and novobiocin

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GyrB mutations in Staphylococcus aureus strains resistant to cyclothialidine, coumermycin, and novobiocin.

The sequence of the gyrase B subunit gene from Staphylococcus aureus strains resistant to the gyrase B subunit inhibitors cyclothialidine, coumermycin, and novobiocin has been determined. The residues altered in the resistant gyrase B subunits map to the ATP-binding region, suggesting that the drugs inhibit ATP binding and hydrolysis. The pattern of cross-resistances indicates that the detailed...

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Coumarin-resistant mutants of Staphylococcus aureus were isolated by three-step selection with novobiocin at different concentrations. Sequencing analysis of the gyrB and parE genes of the first-, second-, and third-step mutants revealed that successive point mutations first occurred specifically in the gyrB gene, followed by a point mutation in the parE gene and then an additional point mutati...

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ژورنال

عنوان ژورنال: Antimicrobial Agents and Chemotherapy

سال: 1996

ISSN: 0066-4804,1098-6596

DOI: 10.1128/aac.40.4.1060