Mechanisms of talin-dependent integrin signaling and crosstalk.

Mechanisms of talin-dependent integrin signaling and crosstalk.
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DOI:
10.1016/j.bbamem.2013.07.017
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发表时间:
2014-02
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
Plow EF
Plow EF
中科院分区:
其他
文献类型:
--
作者:
Das M;Ithychanda S;Qin J;Plow EF

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细胞在各种细胞外基质(ECM)底物上的黏附和迁移过程中,细胞在生理和病理信号的作用下,细胞骨架发生动态重塑。这种细胞反应的主要介质是异二聚体黏附受体整合素。来自不同信号级联的细胞外或细胞内信号通过talin引起整合素的内向外信号,talin是一种将整合素连接到肌动蛋白细胞骨架的细胞骨架蛋白。不同的整合素亚家族在不同的细胞环境下相互通信,并与生长因子受体进行通讯,以促进或抑制各种整合素介导的功能。由于Talin是整合素激活的重要中介,因此整合素的大部分串扰都会受到talin的影响。然而,尽管对talin在整合素激活中的作用以及作为ECM-肌动蛋白连接的稳定剂的作用存在着广泛的认识,但关于它在调节整合素间通讯方面的作用的信息仍然有限。本文将重点介绍Talin的结构及其对整合素激活的调控,并讨论其在整合素串扰中的潜在作用。
Cells undergo dynamic remodeling of the cytoskeleton during adhesion and migration on various extracellular matrix (ECM) substrates in response to physiological and pathological cues. The major mediators of such cellular responses are the heterodimeric adhesion receptors, the integrins. Extracellular or intracellular signals emanating from different signaling cascades cause inside-out signaling of integrins via talin, a cystokeletal protein that links integrins to the actin cytoskeleton. Various integrin subfamilies communicate with each other and growth factor receptors under diverse cellular contexts to facilitate or inhibit various integrin-mediated functions. Since talin is an essential mediator of integrin activation, much of the integrin crosstalk would therefore be influenced by talin. However, despite the existence of an extensive body of knowledge on the role of talin in integrin activation and as a stabilizer of ECM-actin linkage, information on its role in regulating inter-integrin communication is limited. This review will focus on the structure of talin, its regulation of integrin activation and discuss its potential role in integrin crosstalk.
整联蛋白alpha vβ3差异调节纤连蛋白受体α5β1的粘附和吞噬功能。
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