Focal adhesion kinase: switching between GAPs and GEFs in the regulation of cell motility.

Focal adhesion kinase: switching between GAPs and GEFs in the regulation of cell motility.
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DOI:
10.1016/j.ceb.2009.05.006
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发表时间:
2009-10
影响因子:
7.5
通讯作者:
Schlaepfer DD
Schlaepfer DD
中科院分区:
生物学2区
文献类型:
--
作者:
Tomar A;Schlaepfer DD

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黏着斑(FA)激酶(FAK)是一种胞质蛋白酪氨酸激酶,参与细胞骨架重塑、细胞黏附结构的形成和解体,以及Rho家族GTP酶的调节。因此,FAK被广泛认为是细胞定向运动的重要促进因子。近期研究阐明了FAK在这些过程中的新分子关联。具体而言,FAK促进鸟嘌呤核苷酸交换因子(GEFs)和GTP酶激活蛋白(GAPs)的局部循环激活。一般来说,GEFs激活RhoGTP酶,而GAPs使其失活。因此,FAK处于独特的信号传导位置,可在时空上调节RhoGTP酶的活性,从而影响高效的细胞定向迁移所需的各个步骤(整合素激活、前缘形成、黏着斑周转和后缘回缩)。
Focal adhesion (FA) kinase (FAK) is a cytoplasmic protein-tyrosine kinase involved in cytoskeleton remodeling, formation and disassembly of cell adhesion structures, and in the regulation of Rho-family GTPases. Therefore, FAK is widely accepted as an important promoter of directional cell movement. Recent studies have elucidated new molecular connections of FAK in these processes. Specifically, FAK facilitates the localized and cyclic activation of guanine nucleotide exchange factors (GEFs) and GTPases-activating proteins (GAPs). In general, GEFs activate, while GAPs inactivate RhoGTPases. Therefore, FAK is in a unique signaling position to modulate RhoGTPase activity in space and time, thereby affecting various steps (integrin activation, leading edge formation, FA turnover, and trailing edge retraction) needed for efficient directional cell migration.
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