Title : JAK1-dependent phosphorylation of insulin receptor substrate-1 (IRS-1) is inhibited by IRS-1 serine phosphorylation.

Pub. Date : 1999 Sep 24

PMID : 10488146






4 Functional Relationships(s)
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1 Here, we report that serine phosphorylation of IRS-1 induced by either okadaic acid (OA) or chronic insulin stimulation prevents interferon-alpha (IFN-alpha)-dependent IRS-1 tyrosine phosphorylation and IFN-alpha-dependent IRS-1/phosphatidylinositol 3"-kinase (PI3K) association. Tyrosine interferon alpha 1 Homo sapiens
2 Here, we report that serine phosphorylation of IRS-1 induced by either okadaic acid (OA) or chronic insulin stimulation prevents interferon-alpha (IFN-alpha)-dependent IRS-1 tyrosine phosphorylation and IFN-alpha-dependent IRS-1/phosphatidylinositol 3"-kinase (PI3K) association. Tyrosine interferon alpha 1 Homo sapiens
3 We found that treatment of U266 cells with OA induced serine phosphorylation of IRS-1 and completely blocked IFN-alpha-dependent tyrosine phosphorylation of IRS-1 and IFN-alpha-dependent IRS-1/PI3K association. Tyrosine interferon alpha 1 Homo sapiens
4 Chronic treatment of U266 cells with insulin led to a 50% reduction in IFN-alpha-dependent tyrosine phosphorylation of IRS-1 and IRS-1/PI3K association. Tyrosine interferon alpha 1 Homo sapiens