探索人类β型冠状病毒尖端糖蛋白的内在结构可塑性和构造动态
Yago Ferreira E Silva1,2, Harold Hilarion Fokoue1, Paulo Ricardo Batista1,2
1Programa de Computação Científica, Vice-Presidência de Educação, Informação e Comunicação, Fundação Oswaldo Cruz, Av. Brasil 4365, Residência Oficial, Manguinhos, 21040-900 Rio de Janeiro, Brazil.
Journal of chemical information and modeling
|July 17, 2025
概括
人类β型冠状病毒的尖端蛋白显示保存的动态,SARS-CoV-2变种表现出独特的运动. 带结合,而不是突变,驱动关键的开放运动,对于理解病毒进入和设计新疫苗至关重要.
科学领域:
- 结构生物学是结构生物学.
- 病毒学 病毒学
- 计算生物物理学的计算生物物理.
背景情况:
- 尖 (S) 糖蛋白对人类β冠状病毒 (HCoV) 进入,受体结合和免疫逃避至关重要.
- 了解尖端蛋白的动态对于开发有效的抗病毒策略至关重要.
研究的目的:
- 通过计算分析跨HCoV的尖峰形态动态,专注于SARS-CoV-2及其变体.
- 为了研究驱动尖端蛋白开启和关闭运动的机制.
- 为了确定治疗和疫苗设计的变异特异性动态特征.
主要方法:
- 使用大型冷电子显微镜 (cryo-EM) 结构组合进行深入的计算分析.
- 综合建模方法,包括组合和单结构正常模式.
- 混合分子动力学模拟和动态网络分析.
主要成果:
- 尽管有序列分歧,但HCoV尖峰仍然具有采样开放和封闭受体结合域 (RBD) 状态的能力.
- 在SARS-CoV-2中,类似链的RBD开放运动占主导地位,调节了ACE2的可访问性,主要是由连接体结合驱动的.
- 奥米克龙变体显示了特定的域间通信重塑,并支持apop形式的封闭RBD,但保留了联体诱导的开放能力.
结论:
- 尖端蛋白的动态在HCoV中保持不变,但表现出变种特定的适应性.
- 结合体是一种关键调节器的尖端蛋白形状变化,比D614G等特定突变更为如此.
- 对尖端动态的机械洞察力支持开发适应变异的治疗方法和疫苗.
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