Phosphoinositide 3-kinase gamma is a mediator of Gbetagamma-dependent Jun kinase activation.
J Biol Chem
; 273(5): 2505-8, 1998 Jan 30.
Article
em En
| MEDLINE
| ID: mdl-9446550
ABSTRACT
Jun kinases (JNK) are involved in the stress response of mammalian cells. Stimulation of JNK can be induced by stress factors and by agonists of tyrosine kinase and G protein-coupled receptors. G protein-dependent receptors stimulate JNK via Gbetagamma subunits of heterotrimeric G proteins, but the subsequent signaling reaction has been undefined. Here we demonstrate JNK activation in COS-7 cells by Gbetagamma-stimulated phosphoinositide 3-kinase gamma (PI3Kgamma). Signal transduction from PI3Kgamma to JNK can be suppressed by dominant negative mutants of Ras, Rac, and the protein kinase PAK. These results identify PI3Kgamma as a mediator of Gbetagamma-dependent regulation of JNK activity.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas Quinases Dependentes de Cálcio-Calmodulina
/
Proteínas de Ligação ao GTP
/
1-Fosfatidilinositol 4-Quinase
/
Proteínas Quinases Ativadas por Mitógeno
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
J Biol Chem
Ano de publicação:
1998
Tipo de documento:
Article
País de afiliação:
Alemanha