一项计算研究,以了解p120-catenin对cadherin cis-dimerization的影响
Zhaoqian Su1, Vinh H Vu2, Deborah E Leckband2,3
1Department of Systems and Computational Biology, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA.
Journal of molecular cell biology
|September 27, 2023
概括
内外信号传递,其中p120-catenin (p120ctn) 的细胞内结合会影响细胞表面的阴素功能,至关重要. 这项研究揭示了p120ctn通过改变其细胞外动力学和促进聚类来全质调节阴素的cis-dimerization.
科学领域:
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
- 计算生物学 计算生物学
背景情况:
- 细胞表面受体功能通常由细胞外联体结合,启动细胞内信号来调节.
- 内外信号传输,反向过程,越来越多地被认为是它在调节细胞表面受体活性中的作用.
- 细胞内事件影响干林介导的细胞粘附的确切机制尚不完全理解.
研究的目的:
- 为了阐明在卡德林介导的细胞粘附中内外信号的基础上的分子机制.
- 研究p120-catenin (p120ctn) 的细胞内结合如何影响cadherin细胞外聚类和粘合性质.
主要方法:
- 开发一种新的多尺度模拟程序,将全原子分子动力学和粗粒度采样相结合.
- 全原子模拟分析了p120ctn结合后的卡德林细胞外区域的结构动力学.
- 粗粒度模拟以评估改变的干素动态对侧面相互作用的影响.
主要成果:
- 细胞内p120ctn结合改变了cadherin细胞外域的结构动态.
- 这些改变的动力学增加了细胞表面侧向卡德林相互作用的概率,促进了聚类.
- 证明p120ctn结合通过调节细胞外动力学和潜在的寡合化驱动的聚类来全质调节阴素的cis-dimerization.
结论:
- p120ctn作为一个关键调节器,在内外信号传递中起到卡德林粘附的作用.
- 这项研究为细胞内事件如何影响cadherin聚类和功能提供了机制性的解释.
- 开发的计算框架为研究其他跨膜信号系统提供了可通用的方法.
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