DNA gyrase negatively supercoils closed circular double- stranded DNA in an ATP-dependent manner and also catalyzes the interconversion of other topological isomers of double-stranded DNA rings, including catenanes and knotted rings (By similarity). spr0715 DNA gyrase subunit B MTEEIKNLQAQDYDASQIQVLEGLEAVRMRPGMYIGSTSKEGLHHLVWEIVDNSIDEALAGFASHIQVFIEPDDSITVVDDGRGIPVDIQEKTGRPAVETVFTVLHAGGKFGGGGYKVSGGLHGVGSSVVNALSTQLDVHVHKNGKIHYQEYRRGHVVADLEIVGDTDKTGTTVHFTPDPKIFTETTIFDFDKLNKRIQELAFLNRGLQISITDKRQGLEQTKHYHYEGGIASYVEYINENKDVIFDTPIYTDGEMDDITVEVAMQYTTGYHENVMSFANNIHTHEGGTHEQGFRTALTRVINDYARKNKLLKDNEDNLTGEDVREGLTAVISVKHPNPQFEGQTKTKLGNSEVVKITNRLFSEAFSDFLMENPQIAKRIVEKGILAAKARVAAKRAREVTRKKSGLEISNLPGKLADCSSNNPAETELFIVEGDSAGGSAKSGRNREFQAILPIRGKILNVEKASMDKILANEEIRSLFTAMGTGFGAEFDVSKARYQKLVLMTDADVDGAHIRTLLLTLIYRYMKPILEAGYVYIAQPPIYGVKVGSEIKEYIQPGADQEIKLQEALARYSEGRTKPTIQRYKGLGEMDDHQLWETTMDPEHRLMARVSVDDAAEADKIFDMLMGDRVEPRREFIEENAVYSTLDV GYRB_STRR6 648 gyrB