Focal adhesion

Cell-matrix adhesions play essential roles in important biological processes including cell motility, cell proliferation, cell differentiation, regulation of gene expression and cell survival. At the cell-extracellular matrix contact points, specialized structures are formed and termed focal adhesions, where bundles of actin filaments are anchored to transmembrane receptors of the integrin family through a multi-molecular complex of junctional plaque proteins. Some of the constituents of focal adhesions participate in the structural link between membrane receptors and the actin cytoskeleton, while others are signaling molecules, including different protein kinases and phosphatases, their substrates, and various adapter proteins. Integrin signaling is dependent upon the non-receptor tyrosine kinase activities of the FAK and src proteins as well as the adaptor protein functions of FAK, src and Shc to initiate downstream signaling events. These signalling events culminate in reorganization of the actin cytoskeleton; a prerequisite for changes in cell shape and motility, and gene expression. Similar morphological alterations and modulation of gene expression are initiated by the binding of growth factors to their respective receptors, emphasizing the considerable crosstalk between adhesion- and growth factor-mediated signaling.

细胞基质粘附在细胞运动、细胞增殖、细胞分化、基因表达调控及细胞存活等重要生物学过程中发挥着至关重要的作用。在细胞与细胞外基质的接触点，形成了特殊的结构，被称为焦点粘附，其中肌动蛋白纤维束通过多分子复合的连接斑蛋白，锚定到整合素家族的跨膜受体上。焦点粘附中的一些组分参与了膜受体与肌动蛋白细胞骨架之间的结构连接，而其他组分则是信号分子，包括不同的蛋白激酶和磷酸酶、它们的底物以及各种适配蛋白。整合素信号依赖于FAK和src蛋白的非受体酪氨酸激酶活性以及FAK、src和Shc的适配蛋白功能，以启动下游信号事件。这些信号事件最终导致肌动蛋白细胞骨架的重组织；这是细胞形状和运动以及基因表达变化的前提条件。类似的结构改变和基因表达调控亦由生长因子与其相应受体的结合所启动，凸显了粘附介导信号与生长因子介导信号之间的重要串扰。

搜集汇总

背景与挑战

背景概述

该数据集是WikiPathways中关于小鼠焦点粘附信号通路的详细路径图（WP85），描述了细胞-基质粘附结构在细胞运动、增殖和生存中的关键作用。它涵盖了整合素受体、肌动蛋白细胞骨架连接蛋白以及信号分子（如FAK和src激酶）的相互作用，并强调与生长因子信号的串扰，适用于细胞生物学和信号传导研究。