在Omicron SARS-CoV-2/hACE2中的结构适应:进化驱动力的生物物理起源
Ya-Wen Hsiao1, David J Bray2, Tseden Taddese2
1The Hartree Centre, STFC Daresbury Laboratory, Warrington, United Kingdom; Scientific Computing Department, STFC Daresbury Laboratory, Warrington, United Kingdom.
Biophysical journal
|September 17, 2023
概括
欧米克朗变种 (BA.1,BA.2) 由于突变和甘氨酸,对人类ACE2的结合增强. 这些SARS-CoV-2变种表现出结构变化,增加了尖端蛋白与受体的近距离,并可能改变COVID-19传播动态.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 计算生物物理学的计算生物物理学
背景情况:
- 由SARS-CoV-2变种驱动的COVID-19大流行.
- 像Omicron (BA.1,BA.2) 这样的新变种表现出增加的传染性和严重性.
- 了解分子相互作用是对抗病毒演变的关键.
研究的目的:
- 检查Omicron突变如何调节尖端蛋白 (RBD) 和ACE2相互作用.
- 研究甘氨酸在Omicron变体结合中的作用.
- 阐明增强病毒结合的生物物理基础.
主要方法:
- 分子动力学模拟.分子动力学模拟.
- 对尖端蛋白受体结合域 (RBD) 相互作用的分析.
- 将Omicron BA.1和BA.2与野生型的SARS-CoV-2进行比较.
主要成果:
- 甘氨酸对Omicron RBD-ACE2结合至关重要,增强与突变的相互作用.
- 奥米克龙突变增加了RBD正电荷,使尖端蛋白和ACE2更接近.
- BA.2显示了增加的灵活性和双RBD与ACE2结合的潜力.
- 在ACE2的N90位的甘氨酸从抑制转变为促进Omicron结合.
结论:
- 欧米克朗突变和甘氨酸协同增强SARS-CoV-2与人类ACE2的结合.
- 结构和静电变化为病毒进化和宿主细胞参与提供了洞察力.
- 这些发现为病毒突变背后的驱动力提供了生物物理基础.
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