突变和ACE2诱导的Allosteric网络重新连接在delta和OmicronSARS-CoV-2尖端蛋白中
Mandira Dutta1, Gregory A Voth1
1Department of Chemistry, Chicago Center for Theoretical Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, IL 60637.
Biophysical journal
|January 15, 2026
概括
这项研究揭示了Delta和Omicron等SARS-CoV-2变种如何使用它们的尖端蛋白来内部通信. 结合ACE2增强了这种沟通,影响了病毒感染力,并为新的抗病毒药物提供了标.
科学领域:
- 病毒学 病毒学
- 计算生物学 计算生物学
- 结构生物学 结构生物学
背景情况:
- 严重急性呼吸道综合征冠状病毒2 (SARS-CoV-2) 尖端蛋白通过ACE2受体结合媒介病毒进入.
- 尖端蛋白突变会影响病毒感染性和全性传播途径.
- 了解尖蛋白全菌网络对于抗病毒药物设计至关重要.
研究的目的:
- 在SARS-CoV-2 Delta和Omicron尖端蛋白中划分远程全性通信网络.
- 为了确定关键的残留物和途径调解全沟通.
- 了解ACE2结合和变异特异性突变如何影响这些网络.
主要方法:
- 原子分子动力学 (MD) 模拟Delta和Omicron尖端蛋白的模拟.
- 线性相互信息 (LMI) 计算用于分析残留物相互作用.
- 基于图形理论的分析,包括中间中心性,以绘制通信通道.
主要成果:
- 结合ACE2显著增强了尖端蛋白内的全结合.
- 确定了三种关键的链接器 (Link1,Link2,Link3),它们调解着全沟通.
- 德尔塔通过Link1/Link2显示出更强的信号;奥米克朗通过Link3重定向,形成更广泛的S1网络和远程合.
- 在Omicron中发生的特定突变 (N856K,T547K) 重构了全性通路.
结论:
- 变异性合的变种特异性差异影响融合性和免疫逃避.
- 绘制全位和突变效应的地图为开发抗病毒策略提供了一个框架.
- 针对已识别的全性通路可能会导致新的抗病毒疗法.
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