Physical association of the small GTPase Rho with a 68-kDa phosphatidylinositol 4-phosphate 5-kinase in Swiss 3T3 cells.
Physical association of the small GTPase Rho with a 68-kDa phosphatidylinositol 4-phosphate 5-kinase in Swiss 3T3 cells.
复制标题
Swiss 3T3 细胞中小 GTPase Rho 与 68 kDa 磷脂酰肌醇 4-磷酸 5-激酶的物理关联。
DOI:
10.1091/mbc.7.3.435
复制
发表时间:
1996
影响因子:
3.3
通讯作者:
Schwartz,MA
中科院分区:
文献类型:
--
作者:
Ren,XD;Bokoch,GM;Traynor-Kaplan,A;Jenkins,GH;Anderson,RA;Schwartz,MA
Our previous work showed that post-translationally modified Rho in its GTP-bound state stimulated phosphatidylinositol 4-phosphate 5-kinase (PIP5K) activity in mouse fibroblast lysates. To investigate whether Rho physically interacts with PIP5K, we incubated immobilized Rho-GST with Swiss 3T3 cell lysates and tested for retained PIP5K activity. Rho-GST, but not Ras-GST or GST alone, bound significant PIP5K activity. The binding of PIP5K was independent of whether Rho was in a GTP- or GDP-bound state. An antibody against a 68-kDa human erythrocyte type I PIP5K recognized a single 68-kDa protein eluted from Rho-GST column. The Rho-associated PIP5K responded to phosphatidic acid differentially from the erythrocyte type I PIP5K, suggesting that it could be a distinct isoform not reported previously. Rho co-immunoprecipitated with the 68-kDa PIP5K from Swiss 3T3 lysates, demonstrating that endogenous Rho also interacts with PIP5K. ADP-ribosylation of Rho with C3 exoenzyme enhanced PIP5K binding by approximately eightfold, consistent with the ADP-ribosylated Rho functioning as a dominant negative inhibitor. These results demonstrate that Rho physically interacts with a 68-kDa PIP5K, although whether the association is direct or indirect is unknown.
登录
查看更多内容
DOI:
10.1016/s0021-9258(20)89496-4
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
N. Morii;K. Kawano;A. Sekine;T. Yamada;S. Narumiya
通讯作者:
S. Narumiya
DOI:
10.1073/pnas.89.13.6138
发表时间:
1992
影响因子:
11.1
作者:
Schwartz,MA;Lechene,C
通讯作者:
Lechene,C
影响因子:
56.9
作者:
MOODIE, SA;WILLUMSEN, BM;WOLFMAN, A
通讯作者:
WOLFMAN, A
影响因子:
8
作者:
A. Self;H. Paterson;A. Hall
通讯作者:
A. Hall
DOI:
10.1016/s0021-9258(18)47140-2
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
K. Malcolm;A. Ross;R. Qiu;M. Symons;J. Exton
通讯作者:
J. Exton