本质上有障碍的区域作为宫项圈功能,远程调节SARS-CoV-2流感尖头的点头动态
1Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, West Bengal, India.
The journal of physical chemistry. B
|September 22, 2023
概括
在SARS-CoV-2尖端蛋白中,内在无序区域 (IDR) 控制头部点头. 关注变异中的D614G等突变改变了IDR动态,影响了尖端结构并提供了治疗点.
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:
- 在SARS-CoV-2预注射尖端蛋白的受体结合域 (RBDs) 中,表现出对于宿主细胞相互作用至关重要的动态"点头"运动.
- 了解尖端剪切剂的大规模结构动态和突变的影响对于理解病毒行为至关重要.
研究的目的:
- 开发SARS-CoV-2尖端剪切器的粗粒模型,以调查其结构动态和突变的影响.
- 阐明内在无序区域 (IDR) 在控制尖头点头机制中的作用.
主要方法:
- 开发一个拓对称信息载荷的粗粒度结构基础模型的尖端剪切机.
- 利用最近的冷电子显微镜 (cryo-EM) 结构数据进行模型开发.
- 对突变影响的分析,特别是D614G,A570D和S982A,对IDR动态和尖峰结构的分析.
主要成果:
- 两个遥远的内在无序区域 (IDRs),即630和FPPR循环,被确定为尖头点头动态的关键控制器.
- 这些IDRs的秩序-混乱过渡在携带D614G突变的关注变体 (VOC) 中更为明显.
- D614G突变破坏了盐桥,改变了IDR动态及其与C端域的相互作用,使集体行动成为RBD的"宫项圈".
结论:
- 内在无序区域 (IDR) 在调节SARS-CoV-2尖端蛋白结构和动态方面发挥着关键作用,影响RBD姿势.
- 突变,特别是D614G,显著影响IDR秩序-乱过渡及其在尖端剪切器中的功能连接.
- 针对这些IDR是一个有希望的战略,通过人工控制尖端蛋白的动态来开发新的治疗干预措施.
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