Inhibition of DNA gyrase by optically active ofloxacin
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چکیده
منابع مشابه
Synthesis and antibacterial activities of optically active ofloxacin.
Two optically active (100% enantiomeric excess) isomers of ofloxacin [(+/-)-ofloxacin; DL-8280; (+/-)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7 H-pyrido[1,2,3-de] [1,4] benzoxazine-6-carboxylic acid] were prepared by use of their optically resolved synthetic intermediates. One of the isomers, (-)-ofloxacin, was 8 to 128 times more potent in inhibiting the multiplication ...
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The antibacterial activity of levofloxacin was compared with those of ofloxacin, ciprofloxacin, and other antibiotics. In general, levofloxacin was equally active or up to fourfold more active than ofloxacin against all 801 organisms tested. Levofloxacin was twofold [corrected] more active than ciprofloxacin against Streptococcus pneumoniae and 2- to 4-fold more active than ciprofloxacin agains...
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Reverse gyrase is a unique DNA topoisomerase endowed with ATP-dependent positive supercoiling activity. It is typical of microorganisms living at high temperature and might play a role in maintenance of genome stability and repair. We have identified the translesion DNA polymerase SsoPolY/Dpo4 as one partner of reverse gyrase in the hyperthermophilic archaeon Sulfolobus solfataricus. We show he...
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Mycobacterium leprae, the causative agent of leprosy, is noncultivable in vitro; therefore, evaluation of antibiotic activity against M. leprae relies mainly upon the mouse footpad system, which requires at least 12 months before the results become available. We have developed an in vitro assay for studying the activities of quinolones against the DNA gyrase of M. leprae. We overexpressed in Es...
متن کاملMapping the active site tyrosine of Escherichia coli DNA gyrase.
We have identified tyrosine 122 of the A subunit of Escherichia coli DNA gyrase as the tyrosine that becomes covalently bound to DNA when the enzyme breaks the phosphodiester bonds of DNA. The covalent gyrase X DNA complex was isolated following cleavage of the DNA by gyrase in the presence of the gyrase inhibitor oxolinic acid. The active site tyrosine was first mapped to two overlapping pepti...
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ژورنال
عنوان ژورنال: Antimicrobial Agents and Chemotherapy
سال: 1987
ISSN: 0066-4804,1098-6596
DOI: 10.1128/aac.31.2.325