Phosphorylation of actopaxin regulates cell spreading and migration.
Phosphorylation of actopaxin regulates cell spreading and migration.
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DOI:
10.1083/jcb.200404024
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发表时间:
2004-09-13
期刊:
影响因子:
--
通讯作者:
Turner CE
中科院分区:
文献类型:
--
作者:
Clarke DM;Brown MC;LaLonde DP;Turner CE
Actopaxin is an actin and paxillin binding protein that localizes to focal adhesions. It regulates cell spreading and is phosphorylated during mitosis. Herein, we identify a role for actopaxin phosphorylation in cell spreading and migration. Stable clones of U2OS cells expressing actopaxin wild-type (WT), nonphosphorylatable, and phosphomimetic mutants were developed to evaluate actopaxin function. All proteins targeted to focal adhesions, however the nonphosphorylatable mutant inhibited spreading whereas the phosphomimetic mutant cells spread more efficiently than WT cells. Endogenous and WT actopaxin, but not the nonphosphorylatable mutant, were phosphorylated in vivo during cell adhesion/spreading. Expression of the nonphosphorylatable actopaxin mutant significantly reduced cell migration, whereas expression of the phosphomimetic increased cell migration in scrape wound and Boyden chamber migration assays. In vitro kinase assays demonstrate that extracellular signal-regulated protein kinase phosphorylates actopaxin, and treatment of U2OS cells with the MEK1 inhibitor UO126 inhibited adhesion-induced phosphorylation of actopaxin and also inhibited cell migration.
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影响因子:
9.2
作者:
Bailly, M;Ichetovkin, I;Condeelis, J
通讯作者:
Condeelis, J
DOI:
10.1083/jcb.200212172
发表时间:
2003-05-26
期刊:
The Journal of cell biology
影响因子:
--
作者:
Manes T;Zheng DQ;Tognin S;Woodard AS;Marchisio PC;Languino LR
通讯作者:
Languino LR
影响因子:
4.1
作者:
Curtis, M;Nikolopoulos, SN;Turner, CE
通讯作者:
Turner, CE
影响因子:
3.3
作者:
Houle, FO;Rousseau, S;Huot, J
通讯作者:
Huot, J
DOI:
10.1083/jcb.135.4.1109
发表时间:
1996-11
期刊:
The Journal of cell biology
影响因子:
--
作者:
Brown MC;Perrotta JA;Turner CE
通讯作者:
Turner CE