ACE-2与不同RBD数量的自我关联:SARS-CoV-2感染的动态模拟视角
Meina Ren1, Ziyi Ma1, Lina Zhao1
1Key Laboratory of Molecular Biophysics, Hebei Province, Institute of Biophysics, School of Health Science & Biomedical Engineering, Hebei University of Technology, Tianjin 300401, China.
Journal of chemical information and modeling
|June 29, 2023
概括
SARS-CoV-2 尖蛋白与ACE-2受体的结合增强了病毒感染. 斯派克-ACE-2复合物的不同结合模式显示出不同的自我结合效率,影响病毒活性.
科学领域:
- 分子生物学分子生物学
- 病毒学 病毒学
- 生物物理学的生物物理.
背景情况:
- SARS-CoV-2的进入取决于Spike蛋白与ACE-2受体的结合.
- 受到Spike结合影响的ACE-2自我关联对于病毒感染至关重要.
- 了解Spike-ACE-2复合体的形成是病毒传播的关键.
研究的目的:
- 调查ACE-2的自我关联效率和构造相关性,其中有不同数量的绑定尖端受体结合域 (RBD).
- 阐明控制Spike-ACE-2异质蛋白复合体形成的分子机制.
- 为了将ACE-2自我关联与SARS-CoV-2病毒活动相关联.
主要方法:
- 使用了广泛的粗粒度动态模拟.
- 对自我关联效率,形状变化和分子相互作用的表征.
- 分析具有不同RBD负载量的ACE-2复合体 (A模式:两个/全RBD,B模式:单个RBD).
主要成果:
- 结合两个/全RBD (Mode-A) 的ACE-2迅速形成了紧的线性异质蛋白二元体.
- 与单个RBD (模式B) 结合的ACE-2表现出显著的自我关联和集群.
- 与RBD连接的ACE-2ectodomains采用了更直立的形状,与部域包装驱动快速的自我关联.
结论:
- 与ACE-2结合的RBD的数量决定了其自我关联效率和复杂的形状.
- 模式-B复合体,尽管单个RBD绑定,保持实质性的自我关联和集群能力.
- 这些发现为SARS-CoV-2感染机制和病毒活动提供了分子洞察力.
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