Enzyme
DNA gyrase
Definitions related to dna gyrase:
  • A bacterial DNA topoisomerase II that catalyzes ATP-dependent breakage of both strands of DNA, passage of the unbroken strands through the breaks, and rejoining of the broken strands. Gyrase binds to DNA as a heterotetramer consisting of two A and two B subunits. In the presence of ATP, gyrase is able to convert the relaxed circular DNA duplex into a superhelix. In the absence of ATP, supercoiled DNA is relaxed by DNA gyrase.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • Catalyzes the twisting of relaxed, circular DNA into a super coiled state.
    CRISP Thesaurus
    National Institutes of Health, 2006
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