Mutant of Insulin Receptor Substrate-1 Incapable of Activating Phosphatidylinositol 3-Kinase Did Not Mediate Insulin-stimulated Maturation of Xenopus laevis Oocytes*
Mutant of Insulin Receptor Substrate-1 Incapable of Activating Phosphatidylinositol 3-Kinase Did Not Mediate Insulin-stimulated Maturation of Xenopus laevis Oocytes*
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无法激活磷脂酰肌醇 3-激酶的胰岛素受体底物 1 突变体不介导胰岛素刺激的非洲爪蟾卵母细胞成熟*
DOI:
10.1074/jbc.271.45.28677
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发表时间:
1996
期刊:
影响因子:
--
通讯作者:
T. Kadowaki
中科院分区:
文献类型:
--
作者:
R. Yamamoto;Z. Honda;K. Ueki;K. Tobe;Y. Kaburagi;Yoshihiko Takahashi;H. Tamemoto;Takeshi Suzuki;Kohji Itoh;Y. Akanuma;Y. Yazaki;T. Kadowaki
Insulin receptor substrate-1 (IRS-1) is rapidly phosphorylated on multiple tyrosine residues in response to insulin and binds several Src homology 2 domain-containing proteins, thereby initiating downstream signaling. To assess the tyrosine phosphorylation sites that mediate relevant downstream signaling and biological effects, we created site-directed mutants of IRS-1 and overexpressed them in the Xenopus laevis oocyte. In oocytes overexpressing IRS-1 or IRS-1-895F (Tyr-895 replaced with phenylalanine), insulin activated phosphatidylinositol (PI) 3-kinase, p70 S6 kinase, and mitogen-activated protein kinase and induced oocyte maturation. In contrast, in oocytes overexpressing IRS-1-4F (Tyr-460, Tyr-608, Tyr-939, and Tyr-987 of IRS-1 replaced with phenylalanine), insulin did not activate PI 3-kinase, p70 S6 kinase, and mitogen-activated protein kinase and failed to induce oocyte maturation. These observations indicate that in X. laevis oocytes overexpressing IRS-1, the association of PI 3-kinase rather than Grb2 (growth factor-bound protein 2) with IRS-1 plays a major role in insulin-induced oocyte maturation. Activation of PI 3-kinase may lie upstream of mitogen-activated protein kinase activation and p70 S6 kinase activation in response to insulin.
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DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Yamauchi,K;Holt,K;Pessin,JE
通讯作者:
Pessin,JE
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Chuang,LM;Hausdorff,SF;MyersJr,MG;White,MF;Birnbaum,MJ;Kahn,CR
通讯作者:
Kahn,CR
DOI:
10.1016/s0021-9258(19)61974-5
发表时间:
1994-11
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
M. G. Myers;T. Grammer;Ling-mei Wang;X. Sun;J. Pierce;J. Blenis;M. White
通讯作者:
M. G. Myers;T. Grammer;Ling-mei Wang;X. Sun;J. Pierce;J. Blenis;M. White
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Kuhné,MR;Pawson,T;Lienhard,GE;Feng,GS
通讯作者:
Feng,GS
DOI:
10.1073/pnas.90.11.5172
发表时间:
1993-06-01
影响因子:
11.1
作者:
CHUANG, LM;MYERS, MG;KAHN, CR
通讯作者:
KAHN, CR