anomerization in methanol. AMM is a potent and broad‐spectrum antibiotic against Gram‐positive pathogenic bacteria by inhibiting DNA gyrase and bacterial topoisomerase IV. The target of AMM has been proved to be the DNA gyrase B subunit and its binding mode to DNA gyrase is different from those of novobiocin and coumermycin, the known DNA gyrase inhibitors.
抗菌药物的滥用对细菌施加了选择压力,从而推动了许多病原体对多药耐药性的发展。我们发现新型抗生素以对抗这些病原体的努力导致了霉菌素(AMM)的发现。AMM的绝对结构通过NMR光谱,X射线分析,
化学降解及其官能团的修饰来确定。AMM由反式组成
萘烷,
四酸,两种不常见的糖(
直链淀粉和
直链淀粉)和二
氯吡咯羧酸。名为淀粉戊糖的
吡喃糖环在
甲醇中进行异构化。通过抑制DNA促旋酶和细菌拓扑异构酶IV,AMM是一种有效且广谱的抗革兰氏阳性病原菌的抗生素。事实证明,AMM的靶标是DNA促旋酶B亚基,其与DNA促旋酶的结合方式与已知的DNA促旋酶
抑制剂novobiocin和coumermycin的结合方式不同。