The Src-family tyrosine kinase inhibitor PP1 interferes with the activation of ribosomal protein S6 kinases.
The Src-family tyrosine kinase inhibitor PP1 interferes with the activation of ribosomal protein S6 kinases.
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Src 家族酪氨酸激酶抑制剂 PP1 干扰核糖体蛋白 S6 激酶的激活。
DOI:
10.1042/bj20020198
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发表时间:
2002
期刊:
影响因子:
--
通讯作者:
Jefferson,LeonardS
中科院分区:
文献类型:
--
作者:
Shah,OJameel;Kimball,ScotR;Jefferson,LeonardS
Considerable biochemical and pharmacological evidence suggests that the activation of ribosomal protein S6 kinases (S6Ks) by activated receptor tyrosine kinases involves multiple co-ordinated input signals. However, the identities of many of these inputs remain poorly described, and their precise involvement in S6K activation has been the subject of great investigative effort. In the present study, we have shown that 4-amino-5-(4-methylphenyl)-7-(t-butyl)pyrazolo[3,4-d]pyrimidine (PP1), a selective inhibitor of the Src family of non-receptor tyrosine kinases, interferes with the activation of 70 and 85kDa S6K gene products (p70S6K1 and p85S6K1) by insulin, insulin-like growth factor 1, sodium orthovanadate and activated alleles of phosphoinositide 3-kinase and H-Ras. PP1 also impedes the activation of AKT/protein kinase B and the extracellular signal-regulated protein kinases 1 and 2 by these various stimuli. Insulin-like growth factor 1 was observed to induce a sustained increase in c-Src autophosphorylation as revealed using anti-phospho-Y416 antisera, but this effect was absent from the cells treated with PP1. To conclude, an activated allele of p70S6K1 is compared with the wild-type allele, resistant to inhibition by PP1 when co-expressed with phosphoinositide-dependent kinase 1 (PDK1), suggesting that PP1 affects p70S6K1 via a PDK1-independent pathway. Thus activation of Src may supply a necessary signal for the activation of p70S6K1 and possibly other S6Ks.
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影响因子:
5.3
作者:
Wooten, MW;Seibenhener, ML;Vandenplas, ML
通讯作者:
Vandenplas, ML
影响因子:
4.1
作者:
Akimoto, K;Nakaya, M;Ohno, S
通讯作者:
Ohno, S
DOI:
10.1152/ajpcell.1998.274.1.c221
发表时间:
1998-01-01
影响因子:
5.5
作者:
Kimball, SR;Horetsky, RL;Jefferson, LS
通讯作者:
Jefferson, LS
影响因子:
4.8
作者:
B. Ballif;A. Shimamura;Eunice Pae;J. Blenis
通讯作者:
J. Blenis
DOI:
10.1042/0264-6021:3470389
发表时间:
2000-04
期刊:
The Biochemical journal
影响因子:
--
作者:
O. Shah;S. Kimball;L. Jefferson
通讯作者:
O. Shah;S. Kimball;L. Jefferson