《英文msh词典》DNA Gyrase A Subunit
[同义词] DNA Gyrase A Subunit
[主题词] DNA Gyrase
[中文释义] DNA旋转酶A亚单位基因
[英文释义] 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 two A and two B subunits. In the presence of ATP,gyrase is able to convert relaxed circular DNA duplex into a superhelix. In the absence of ATP,supercoiled DNA is relaxed by DNA gyrase.