Crystal Structure of Carboxyltransferase from <i>Staphylococcus aureus</i> Bound to the Antibacterial Agent Moiramide B
作者:Molly A. Silvers、Svetlana Pakhomova、David B. Neau、William C. Silvers、Nicholas Anzalone、Carol M. Taylor、Grover L. Waldrop
DOI:10.1021/acs.biochem.6b00641
日期:2016.8.23
antibiotic-resistant bacteria has necessitated a search for new antibacterial agents against novel targets. Moiramide B is a natural product, broad-spectrum antibiotic that inhibits the carboxyltransferase component of acetyl-CoA carboxylase, which catalyzes the first committed step in fatty acid synthesis. Herein, we report the 2.6 Å resolution crystal structure of moiramide B bound to carboxyltransferase. An
抗生素抗性细菌的患病率急剧增加,因此有必要寻找针对新型靶标的新型抗菌剂。Moiramide B是一种天然产物,广谱抗生素,可抑制乙酰辅酶A羧化酶的羧转移酶成分,从而催化脂肪酸合成的第一步。在本文中,我们报道了与羧基转移酶结合的摩尔酰胺B的2.6分辨率晶体结构。出乎意料但重要的发现是,moiramide B结合成烯醇/烯醇化物。晶体学研究表明(4 S)-甲基琥珀酰亚胺部分与酶的氧阴离子孔相互作用,支持阴离子烯醇盐是抗菌剂的活性形式的观点。结构活性研究表明,仅在进入细菌细胞时才需要Moiramide B的不饱和脂肪酸尾巴。这些结果将允许设计针对细菌形式的羧基转移酶的新型抗菌剂。