dna gyrase subunit-a

Nalidixic acid (NSC-82174) 是一种喹诺酮类抗生素，对革兰氏阳性和革兰氏阴性细菌有效。它在较低浓度下有抑菌作用，而在较高浓度下有杀菌作用。它抑制 DNA 促旋酶和拓扑异构酶 IV 的亚基，并可逆地阻止易感细菌中的 DNA 复制。

Dihydronovobiocin is a coumarin antibiotic and derivative of novobiocin .1It is active against the bacteriaS. aureus,S. haemolyticus,D. pneumoniae,S. typhosa,K. pneumoniae, andP. multocida(MICs = 0.6, 2, 0.6, 10, 10, and 3 μg/ml, respectively).2Dihydronovobiocin inhibits DNA gyrase subunit B with an IC50value of 64.5 nM.3 1.Berger, J., and Batcho, A.D.Coumarin - glycoside antibioticsJ. Chromatogr. Lib.15101-158(1978) 2.Hoeksema, H.Dihydronovobiocin and derivatives thereof3,175,9441-9(1965) 3.Gevi, M., and Domenici, E.A scintillation proximity assay amenable for screening and characterization of DNA gyrase B subunit inhibitorsAnal. Biochem.300(1)34-39(2002)