当前位置： SCI文献检索 > NATURE CELL BIOLOGY期刊下所有文献 > Protein complexes containing CYFIP/Sra/PIR121 coordinate Arf1 and Rac1 signalling during clathrin-AP-1-coated carrier biogenesis at the TGN.

Protein complexes containing CYFIP/Sra/PIR121 coordinate Arf1 and Rac1 signalling during clathrin-AP-1-coated carrier biogenesis at the TGN.

Abstract：

:Actin dynamics is a tightly regulated process involved in various cellular events including biogenesis of clathrin-coated, AP-1 (adaptor protein 1)-coated transport carriers connecting the trans-Golgi network (TGN) and the endocytic pathway. However, the mechanisms coordinating coat assembly, membrane and actin remodelling during post-TGN transport remain poorly understood. Here we show that the Arf1 (ADP-ribosylation factor 1) GTPase synchronizes the TGN association of clathrin-AP-1 coats and protein complexes comprising CYFIP (cytoplasmic fragile-X mental retardation interacting protein; Sra, PIR121), a clathrin heavy chain binding protein associated with mental retardation. The Rac1 GTPase and its exchange factor beta-PIX (PAK-interacting exchange factor) activate these complexes, allowing N-WASP-dependent and Arp2/3-dependent actin polymerization towards membranes, thus promoting tubule formation. These phenomena can be recapitulated with synthetic membranes. This protein-network-based mechanism facilitates the sequential coordination of Arf1-dependent membrane priming, through the recruitment of coats and CYFIP-containing complexes, and of Rac1-dependent actin polymerization, and provides complementary but independent levels of regulation during early stages of clathrin-AP1-coated carrier biogenesis.

journal_name

Nat Cell Biol

journal_title

Nature cell biology

authors

Anitei M,Stange C,Parshina I,Baust T,Schenck A,Raposo G,Kirchhausen T,Hoflack B

doi

10.1038/ncb2034

subject

Has Abstract

pub_date

2010-04-01 00:00:00

pages

330-40

issue

4

eissn

1465-7392

issn

1476-4679

pii

ncb2034

journal_volume

12

pub_type

杂志文章

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