A nucleator arms race: cellular control of actin assembly.

A nucleator arms race: cellular control of actin assembly.
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DOI:
10.1038/nrm2867
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发表时间:
2010-04
期刊:
Nature reviews. Molecular cell biology
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其他
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十多年来,Arp2/3复合物、少数成核促进因子以及形成素是已知唯一能直接从头起始肌动蛋白丝形成的分子。然而,在过去几年中,发现了大量在肌动蛋白成核和动力学方面起作用的哺乳动物蛋白质。新发现的成核促进因子,如WASH、WHAMM和JMY,在不同的细胞位置刺激Arp2/3复合物的活性。具有额外生化和细胞活性的形成素成核因子也已被发现。最后,Spire、Cordon - bleu和Leiomodin成核因子揭示了克服肌动蛋白聚合动力学障碍的新方法。
For more than a decade the Arp2/3 complex, a handful of nucleation-promoting factors, and formins were the only molecules known to directly nucleate actin filament formation de novo. However, the past several years have brought a surge in the discovery of mammalian proteins with roles in actin nucleation and dynamics. Newly recognized nucleation-promoting factors, such as WASH, WHAMM, and JMY stimulate Arp2/3 complex activity at distinct cellular locations. Formin nucleators with additional biochemical and cellular activities have also been uncovered. Finally, the Spire, Cordon-bleu, and Leiomodin nucleators have revealed new ways of overcoming the kinetic barriers to actin polymerization.
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