冠状病毒主要蛋白酶的酶动力学模型,包括二元化和连接体结合
Van N T La1, Lulu Kang2, David D L Minh3
1Department of Biology, Illinois Institute of Technology, Chicago, Illinois.
Biophysical journal
|July 6, 2025
概括
这项研究模拟了冠状病毒主要蛋白酶 (MPro) 活性,揭示了像GC376这样的抑制剂如何诱导二分化和合作性,与基质不同,以解释两相反应.
科学领域:
- 生物化学 生物化学
- 酶学 是一种酶学.
- 药物发现 药物发现 药物发现
背景情况:
- 新冠病毒主要蛋白酶 (MPro) 对于病毒复制至关重要,也是SARS-CoV-2抗病毒疗法的关键标.
- 一些MPro酶活性显示双相度-反应曲线 (CRCs),在低度激活,在高度抑制.
- 假设这种双相行为是因联体诱导的二分化而产生的,但缺乏定量运动建模.
研究的目的:
- 开发和验证一个定量动力学模型,该模型整合了MPro.的二分化和配体结合.
- 阐明MPro酶活性的双相CRC背后的机制.
- 描述抑制剂和基质与MPro二元体的相互作用.
主要方法:
- 开发一种新的动力学模型,其中包括二元化和带结合.
- 模型与使用贝叶斯回归的多样化生化和生物物理数据的全球拟合.
- 对可逆共价抑制剂 (GC376) 和光基质对MPro活性影响的分析.
主要成果:
- 开发的运动模型成功地解释了MPro.的双相CRC.
- 抑制剂GC376强烈诱导MPro二分化,并表现出与二分体结合的积极合作性.
- 光基质对二分化产生最小的影响,但与负合作性与二分体结合.
结论:
- MPro的双相度-反应曲线是由抑制剂和基质对二分化和催化周转的差异效应解释的.
- 像GC376这样的抑制剂加速了二元体相反的催化部位的转换,从而导致观察到的双相行为.
- 这种定量模型为了解MPro动力学和指导抗病毒药物设计提供了一个框架.
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