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Updated: May 29, 2025

Peptide-based Identification of Functional Motifs and their Binding Partners

Peptide-based Identification of Functional Motifs and their Binding Partners

Published on: June 30, 2013

远程蛋白质-蛋白质相互作用有助于尼尔马特里尔维尔耐药性

Eric M Lewandowski¹, Xiujun Zhang¹, Haozhou Tan²

¹Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL, USA.

Nature communications

|February 1, 2025

概括

在SARS-CoV-2主要蛋白酶 (Mpro) 中的非活性位点突变增强了二元相互作用,改善了病毒适应性和耐药性. 了解这些相互作用对于开发新的COVID-19治疗方法至关重要.

科学领域:

病毒学病毒学
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:

SARS-CoV-2 主蛋白酶 (Mpro) 处理病毒多蛋白质,是 COVID-19 治疗药物的目标,例如 nirmatrelvir.
药物耐药性来自Mpro活性部位和非活性部位区域的突变,影响抑制剂结合和病毒适应性.

研究的目的:

调查非活性位点突变在拯救病毒适应性和赋予Mpro.对药物耐药性的作用.
为了阐明Mpro的基质相互作用如何延伸到活性部位之外.

主要方法:

使用了三重突变的Mpro (L50F/E166A/L167F),表现出耐尼马特雷尔维尔耐药性和野生类型的适应性.
使用和全长Mpro基板进行基板结合的比较.
分析了各种Mpro突变的结构和酶活性数据.

主要成果:

非活性位点突变,如L50F,增强Mpro二次体-二次体相互作用.
这些突变促进了NSP5-6基质在酶的催化中心中的定位.
基底的结合涉及到超出活性部位残留的相互作用.

结论:

非活性位点突变对Mpro功能和病毒适应性救援有显著的贡献.
考虑整个基质蛋白质对于理解Mpro-基质相互作用至关重要.
这些发现为设计改进的Mpro抑制剂和对抗SARS-CoV-2药物耐药性提供了洞察力.

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