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Updated: Feb 28, 2026

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通过菌素溶解蛋白的融合MurJ翻酶抑制
Yancheng E Li1, S Francesca Antillon2,3, Grace F Baron1
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA.
Nature
|February 25, 2026
概括
抗微生物药物耐药性需要新的目标. 被称为单基因溶解蛋白 (Sgls) 的菌体蛋白抑制了必不可少的MurJ细菌酶,为抗格兰氏阴性细菌提供了一种新的药物设计策略.
科学领域:
- 微生物学 微生物学
- 结构生物学 结构生物学
- 药物发现 药物发现 药物发现
背景情况:
- 抗微生物药物耐药性是一个关键的全球卫生问题.
- 细菌脂质II转酶MurJ是新抗生素的关键标.
- 来自M和PP7菌体的单基因溶解蛋白 (Sgls) 是唯一已知的格拉姆阴性MurJ的抑制剂.
研究的目的:
- 阐明菌体编码的Sgls对MurJ抑制的常见机制.
- 为了识别和描述MurJ的新型Sgl抑制剂.
- 揭示设计新抗菌药物的潜在途径.
主要方法:
- 确定了与MurJ结合的SglM和SglPP7.7的结构.
- 鉴定并结构性地描述了第三个针对MurJ的Sgl,SglCJ3.
- 对Sgl-MurJ相互作用进行比较结构分析.
主要成果:
- SglM,SglPP7和SglCJ3共享一种抑制MurJ的共同机制.
- 这些SGls在融合的过程中进化,将MurJ结合到一个保留的界面.
- 抑制机制涉及将MurJ困在周等离子体开放形状中.
结论:
- 菌体Sgls提供了对抗必要细菌MurJ的保留抑制机制.
- 对Sgl-MurJ相互作用的结构洞察力揭示了抗菌药物设计的一个有希望的途径.
- 融合进化为开发针对细菌细胞壁生物合成的新型抑制剂提供了一个框架.
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