Phosphorylation of Tyrosine 291 Enhances the Ability of WASp to Stimulate Actin Polymerization and Filopodium Formation*
Phosphorylation of Tyrosine 291 Enhances the Ability of WASp to Stimulate Actin Polymerization and Filopodium Formation*
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酪氨酸 291 的磷酸化增强了 WASp 刺激肌动蛋白聚合和丝状足形成的能力*
DOI:
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发表时间:
2002
影响因子:
4.8
通讯作者:
A. Ridley
中科院分区:
文献类型:
--
作者:
Giles O. C. Cory;Ritu Garg;R. Cramer;A. Ridley
Wiskott-Aldrich Syndrome protein (WASp) is a key regulator of the Arp2/3 complex and the actin cytoskeleton in hematopoietic cells. WASp is capable of forming an auto-inhibited conformation, which can be disrupted by binding of Cdc42 and phosphatidylinositol 4,5-bisphosphate, leading to its activation. Stimulation of the collagen receptor on platelets and crosslinking the B-cell receptor induce tyrosine phosphorylation of WASp. Here we show that the Src family kinase Hck induces phosphorylation of WASp-Tyr291 independently of Cdc42 and that this causes a shift in the mobility of WASp upon SDS-PAGE. A phospho-mimicking mutant, WASp-Y291E, exhibited an enhanced ability to stimulate actin polymerization in a cell-free system and when microinjected into primary macrophages induced extensive filopodium formation with greater efficiency than wild-type WASp or a Y291F mutant. We propose that phosphorylation of Tyr291directly regulates WASp function.
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DOI:
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发表时间:
1995
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Durden,DL;Kim,HM;Calore,B;Liu,Y
通讯作者:
Liu,Y
影响因子:
1.6
作者:
Wu B;Wang Z;Lin N;Yan X;Lv Z;Ying Z;Ye Z
通讯作者:
Ye Z
影响因子:
32.4
作者:
Cannon, JL;Labno, CM;Burkhardt, JK
通讯作者:
Burkhardt, JK
DOI:
10.1016/s0021-9258(17)37050-3
发表时间:
1994-03
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
S. Ghazizadeh;J. Bolen;H. Fleit
通讯作者:
S. Ghazizadeh;J. Bolen;H. Fleit