GMF is a cofilin homolog that binds Arp2/3 complex to stimulate filament debranching and inhibit actin nucleation.
GMF is a cofilin homolog that binds Arp2/3 complex to stimulate filament debranching and inhibit actin nucleation.
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DOI:
10.1016/j.cub.2010.03.026
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发表时间:
2010-05-11
期刊:
影响因子:
--
通讯作者:
Goode BL
中科院分区:
文献类型:
--
作者:
Gandhi M;Smith BA;Bovellan M;Paavilainen V;Daugherty-Clarke K;Gelles J;Lappalainen P;Goode BL
Cell locomotion and endocytosis are powered by the rapid polymerization and turnover of branched actin filament networks nucleated by Arp2/3 complex. While a large number of cellular factors have been identified that stimulate Arp2/3 complex-mediated actin nucleation, only a small number of studies so far have addressed which factors promote actin network debranching. Here, we investigated the function of a conserved homologue of ADF/cofilin, glia maturation factor (GMF). We found that S. cerevisiae GMF (also called Aim7) localizes in vivo to cortical actin patches, and displays synthetic genetic interactions with ADF/cofilin. However, GMF lacks detectable actin binding or severing activity, and instead binds tightly to Arp2/3 complex. Using in vitro evanescent wave microscopy, we demonstrated that GMF potently stimulates debranching of actin filaments produced by Arp2/3 complex. Further, GMF inhibits nucleation of new daughter filaments. Together, these data suggest that GMF binds Arp2/3 complex to both ‘prune’ daughter filaments at the branch points and inhibit new actin assembly. These activities and its genetic interaction with ADF/cofilin support a role for GMF in promoting the remodeling and/or disassembly of branched networks. Therefore, ADF/cofilin and GMF, members of the same superfamily, appear to have evolved to interact with actin and actin-related proteins, respectively, and to make mechanistically distinct contributions to the remodeling of cortical actin structures.
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DOI:
10.1083/jcb.148.3.519
发表时间:
2000-02-07
期刊:
The Journal of cell biology
影响因子:
--
作者:
Taunton J;Rowning BA;Coughlin ML;Wu M;Moon RT;Mitchison TJ;Larabell CA
通讯作者:
Larabell CA
影响因子:
9.2
作者:
Cameron, LA;Svitkina, TM;Borisy, GG
通讯作者:
Borisy, GG
影响因子:
11.4
作者:
Lappalainen, P;Fedorov, EV;Drubin, DG
通讯作者:
Drubin, DG
DOI:
10.1073/pnas.1130513100
发表时间:
2003-05-27
影响因子:
11.1
作者:
Le Clainche, C;Pantaloni, D;Carlier, MF
通讯作者:
Carlier, MF
影响因子:
7.8
作者:
Humphries, Christine L;Balcer, Heath I;D'Agostino, Jessica L;Winsor, Barbara;Drubin, David G;Barnes, Georjana;Andrews, Brenda J;Goode, Bruce L
通讯作者:
Goode, Bruce L