菌体选择的循环,抑制阿米诺糖化转化酶,以控制耐药细菌
Qiannan Guo1, Hui Zeng1, Xu-Dong Kong1
1State Key Laboratory of Microbial Metabolism, School of Life Sciences & Biotechnology, and Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
ACS chemical biology
|August 19, 2025
概括
新的循环可以通过抑制氨基糖化酸转化酶 (APHs) 来对抗抗生素耐药性. 这些可以与酶结合.
科学领域:
- 微生物学 微生物学
- 生物化学 生化学
- 药物发现 药物发现 药物发现
背景情况:
- 氨基甘油酸转化酶 (APH) 是多药耐药性的主要原因,使必需的抗生素失活.
- 现有的抑制剂缺乏有效打击APH介导抗性的强度.
- 开发新型抑制剂对于克服抗生素耐药性的临床威胁至关重要.
研究的目的:
- 为了确定针对临床相关的APH酶的强大的基于的抑制剂.
- 描述有效抑制剂的结合机制,并确定有效抑制剂的关键结构动机.
- 为开发新抗生素辅助剂对抗耐药细菌奠定基础.
主要方法:
- 用体显示技术对大型循环库进行了针对APH(3') -Ia.Ia的选.
- 确定了结合亲和关系,并确定了保存的基因.
- 酶抑制试验和竞争性光极化被用来阐明结合机制.
主要成果:
- 发现了新的循环家族,它们具有对APH的纳米分子结合亲和力(3') -Ia.
- 在强烈的抑制剂中发现了两种保存基因,CXW(P/L) LC和CP(W/F) YC.
- 发现二价 (Mg2+,Ca2+) 增强了酶相互作用,表明一种金属依赖的结合.
- 抑制剂被证明与APH(3') -Ia的ATP结合口袋结合,候选A-L3显示出显著的酶抑制.
结论:
- 这项研究确定了具有抑制APH酶显著潜力的新型循环基架.
- 这些发现揭示了依赖金属的结合机制,并突出了ATP结合部位对抑制剂相互作用的重要性.
- 鉴定到的和机理性见解为设计下一代抗生素耐药性破坏剂提供了坚实的基础.
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