Phosphoinositide binding and phosphorylation act sequentially in the activation mechanism of ezrin.
Phosphoinositide binding and phosphorylation act sequentially in the activation mechanism of ezrin.
复制标题
磷酸肌醇的结合和磷酸化在ezrin的激活机理中依次起作用。
DOI:
10.1083/jcb.200307032
复制
发表时间:
2004-03-01
影响因子:
7.8
通讯作者:
Arpin, M
中科院分区:
文献类型:
--
作者:
Fievet, BT;Gautreau, A;Roy, C;Del Maestro, L;Mangeat, P;Louvard, D;Arpin, M
Ezrin, a membrane–actin cytoskeleton linker, which participates in epithelial cell morphogenesis, is held inactive in the cytoplasm through an intramolecular interaction. Phosphatidylinositol 4,5-bisphosphate (PIP2) binding and the phosphorylation of threonine 567 (T567) are involved in the activation process that unmasks both membrane and actin binding sites. Here, we demonstrate that ezrin binding to PIP2, through its NH2-terminal domain, is required for T567 phosphorylation and thus for the conformational activation of ezrin in vivo. Furthermore, we found that the T567D mutation mimicking T567 phosphorylation bypasses the need for PIP2 binding for unmasking both membrane and actin binding sites. However, PIP2 binding and T567 phosphorylation are both necessary for the correct apical localization of ezrin and for its role in epithelial cell morphogenesis. These results establish that PIP2 binding and T567 phosphorylation act sequentially to allow ezrin to exert its cellular functions.
登录
查看更多内容
影响因子:
4.8
作者:
Oshiro, N;Fukata, Y;Kaibuchi, K
通讯作者:
Kaibuchi, K
DOI:
10.1006/bbrc.1998.9823
发表时间:
1998-12-30
影响因子:
3.1
作者:
Simons, PC;Pietromonaco, SF;Elias, L
通讯作者:
Elias, L
影响因子:
64.8
作者:
Speck, O;Hughes, SC;Fehon, RG
通讯作者:
Fehon, RG
DOI:
10.1006/bbrc.1996.1410
发表时间:
1996-09-24
影响因子:
3.1
作者:
Nakamura, F;Amieva, MR;Furthmayr, H
通讯作者:
Furthmayr, H
影响因子:
7.8
作者:
Várnai, P;Balla, T
通讯作者:
Balla, T