Avenaciolides: Potential MurA-Targeted Inhibitors Against Peptidoglycan Biosynthesis in Methicillin-Resistant <i>Staphylococcus aureus</i> (MRSA)
作者:Ching-Ming Chang、Jeffy Chern、Ming-Yi Chen、Kai-Fa Huang、Chein-Hung Chen、Yu-Liang Yang、Shih-Hsiung Wu
DOI:10.1021/ja510375f
日期:2015.1.14
morphology of avenaciolide-treated cells was protoplast-like, which indicated that cell wall biosynthesis was interrupted. Comparing the structures and minimum inhibitory concentrations of 1-4, the α,β-unsaturated carbonyl group seems to be an indispensable moiety for antimicrobial activity. Based on a structural similarity survey of other inhibitors with the same moiety, we revealed that MurA was the drug target
发现用于对抗耐甲氧西林金黄色葡萄球菌 (MRSA) 的新抗生素在后抗生素时代至关重要。在这里,我们报告了从 Neosartorya fischeri 中分离出的四种 avenaciolide 衍生物 (1-4),其中三种对 MRSA 具有显着的抗菌活性。avenaciolide 处理的细胞形态类似于原生质体,这表明细胞壁生物合成被中断。比较 1-4 的结构和最低抑菌浓度,α,β-不饱和羰基似乎是抗菌活性不可或缺的部分。基于对具有相同部分的其他抑制剂的结构相似性调查,我们发现 MurA 是药物靶点。该结论通过 (31)P NMR 光谱和 MS/MS 分析得到验证。虽然磷霉素,这是唯一一种临床上使用的 MurA 靶向抗生素,对治疗具有催化重要的 Cys-to-Asp 突变的细菌无效,avenaciolides 1 和 2 不仅抑制野生型,而且抑制磷霉素抗性 MurA。分子模拟表明,2 竞争性地干扰了