Structures reveal a key mechanism of WAVE regulatory complex activation by Rac1 GTPase.
Structures reveal a key mechanism of WAVE regulatory complex activation by Rac1 GTPase.
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DOI:
10.1038/s41467-022-33174-3
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发表时间:
2022-09-16
影响因子:
16.6
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中科院分区:
文献类型:
--
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The Rho-family GTPase Rac1 activates the WAVE regulatory complex (WRC) to drive Arp2/3 complex-mediated actin polymerization in many essential processes. Rac1 binds to WRC at two distinct sites—the A and D sites. Precisely how Rac1 binds and how the binding triggers WRC activation remain unknown. Here we report WRC structures by itself, and when bound to single or double Rac1 molecules, at ~3 Å resolutions by cryogenic-electron microscopy. The structures reveal that Rac1 binds to the two sites by distinct mechanisms, and binding to the A site, but not the D site, drives WRC activation. Activation involves a series of unique conformational changes leading to the release of sequestered WCA (WH2-central-acidic) polypeptide, which stimulates the Arp2/3 complex to polymerize actin. Together with biochemical and cellular analyses, the structures provide a novel mechanistic understanding of how the Rac1-WRC-Arp2/3-actin signaling axis is regulated in diverse biological processes and diseases. Rho-family GTPase Rac1 activates the WAVE complex (WRC) to promote Arp2/3-mediated actin assembly in various processes. Here, the authors determined cryo-EM structures of WRC bound to Rac1 in different states, revealing how Rac1 binding activates WRC.
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DOI:
10.1038/nrm2867
发表时间:
2010-04
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
影响因子:
64.8
作者:
Chen, Zhucheng;Borek, Dominika;Padrick, Shae B.;Gomez, Timothy S.;Metlagel, Zoltan;Ismail, Ayman M.;Umetani, Junko;Billadeau, Daniel D.;Otwinowski, Zbyszek;Rosen, Michael K.
通讯作者:
Rosen, Michael K.
影响因子:
30.8
作者:
Krauthammer, Michael;Kong, Yong;Ha, Byung Hak;Evans, Perry;Bacchiocchi, Antonella;McCusker, James P.;Cheng, Elaine;Davis, Matthew J.;Goh, Gerald;Choi, Murim;Ariyan, Stephan;Narayan, Deepak;Dutton-Regester, Ken;Capatana, Ana;Holman, Edna C.;Bosenberg, Marcus;Sznol, Mario;Kluger, Harriet M.;Brash, Douglas E.;Stern, David F.;Materin, Miguel A.;Lo, Roger S.;Mane, Shrikant;Ma, Shuangge;Kidd, Kenneth K.;Hayward, Nicholas K.;Lifton, Richard P.;Schlessinger, Joseph;Boggon, Titus J.;Halaban, Ruth
通讯作者:
Halaban, Ruth
影响因子:
16
作者:
Lebensohn AM;Kirschner MW
通讯作者:
Kirschner MW
影响因子:
21.3
作者:
Fort L;Batista JM;Thomason PA;Spence HJ;Whitelaw JA;Tweedy L;Greaves J;Martin KJ;Anderson KI;Brown P;Lilla S;Neilson MP;Tafelmeyer P;Zanivan S;Ismail S;Bryant DM;Tomkinson NCO;Chamberlain LH;Mastick GS;Insall RH;Machesky LM
通讯作者:
Machesky LM