素-动因定向捕获结合的分子基础和细胞功能
Venkat R Chirasani1, Mohammad Ashhar I Khan1, Juilee N Malavade2
1Department of Biochemistry & Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Nature communications
|December 14, 2023
概括
素 (Vcn) 表现出定向捕获结合,这是一个对力敏感的机制,对细胞力学至关重要. 这项研究确定了关键的Vcn残留物,揭示了它在协调细胞结构和迁移中的作用.
科学领域:
- 细胞力学和机械传导机制.
- 蛋白质-actin相互作用的生物物理.
- 细胞粘附和迁移的分子基础
背景情况:
- 细胞通过维护特定物理联系的负载蛋白质以定向响应机械力.
- 导向力敏感结合的分子机制和生物学意义尚未完全理解.
- 素 (Vcn) 是一种关键的承载蛋白质,已知它与丝状 (F) -actin具有定向捕获结合.
研究的目的:
- 通过计算预测和实验验证Vinculin残留物对于定向捕捞结合至关重要.
- 为了研究破坏Vinculin对细胞过程的定向力敏感结合的功能后果.
- 阐明Vinculin的捕获结合机制的分子基础和生物重要性.
主要方法:
- 参与定向捕捞结合的文库林残留物的计算预测.
- 局部定向突变生成以创建具有改变捕获结合特性但完整结构和结合的Vinculin变体.
- 在体外和细胞测试以评估文库林激活,负载,交换动态和对细胞迁移的影响.
主要成果:
- 一组Vinculin变体被生成,保留了结构完整性和与乙烯酸和脂的结合.
- 这些变体的Vinculin负荷降低,交换动态发生变化,表明方向捕捞结合的丧失.
- 这些变异的表达损害了亚细胞结构的协调,并破坏了细胞迁移.
结论:
- 文库林的定向捕获结合是由文库林尾域内的特定残留物介导的.
- 破坏文库林的捕获结合会损害细胞功能,包括结构组织和细胞运动.
- 文库林的定向力敏感结合对于协调细胞对机械线索的反应至关重要.
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