Signaling to actin dynamics.

Signaling to actin dynamics.
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DOI:
10.1083/jcb.146.2.267
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发表时间:
1999-07-26
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Insall RH
Insall RH
中科院分区:
其他
文献类型:
--
作者:
Machesky LM;Insall RH

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真核细胞的肌动蛋白细胞骨架是运动、吞噬、收缩、形状变化、胞质分裂和维持极性的中心。肌动蛋白协调这些不同活动的机制多年来一直令人着迷,但最近发现的速度特别快。这篇综述将集中在细胞如何控制肌动蛋白聚合来产生运动和形状变化的力量。越来越清楚的是,Arp2/31复合体是一个由包括肌动蛋白相关蛋白Arp2和Arp3在内的七种蛋白质组成的复合体,调节着新的肌动蛋白细丝网络在细胞前沿的组装。Wasp(Wiskott-Aldrich综合征蛋白)家族的蛋白质直接与Arp2/3复合体结合,刺激其促进新肌动蛋白细丝的成核。在WASP家族蛋白的上游,受体酪氨酸激酶、Rho家族GTPase CDC42以及可能的G蛋白偶联受体接收和传递导致WASP-Arp2/3复合体介导的肌动蛋白成核的信号。总之,这些想法和发现表明,从细胞外到肌动蛋白聚合驱动的细胞运动的完整信号通路。
THE actin cytoskeleton of a eukaryotic cell is central to locomotion, phagocytosis, contractility, shape changes, cytokinesis and maintenance of polarity. The mechanisms through which actin coordinates these different activities have been fascinating for many years, but the pace of discovery has recently been especially rapid. This review will concentrate on how cells control actin polymerization to produce the force for motility and shape changes.It is becoming clear that the Arp2/31 complex, a complex of seven proteins including the actin-related proteins Arp2 and Arp3, regulates the assembly of new actin filament networks at the leading edges of cells. Proteins of the WASP (Wiskott-Aldrich Syndrome protein) family bind directly to the Arp2/3 complex and stimulate its ability to promote the nucleation of new actin filaments. Upstream of WASP-family proteins, receptor tyrosine kinases, the Rho-family GTPase Cdc42, and likely G protein–coupled receptors, receive and transmit the signals leading to WASP-Arp2/3 complex-mediated actin nucleation. Together, these ideas and discoveries suggest complete signaling pathways from outside of the cell to actin polymerization-driven cell motility.
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