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- W2112106256 abstract "Interferons (IFNs) induce early response genes by stimulating Janus family (Jak) tyrosine kinases, leading to tyrosine phosphorylation of Stat (signal transducer and activator of transcription) proteins. Previous studies demonstrated that a protein-tyrosine phosphatase (PTP) is required for activation of the ISGF3 transcription complex by IFNα/β, but the specific PTP responsible remained unidentified. We now show that the SH2 domain containing tyrosine phosphatase PTP1D (also designated as SHPTP2, SHPTP3, PTP2C, or Syp) is constitutively associated with the IFNα/β receptor and becomes tyrosine-phosphorylated in response to ligand. Furthermore, transient expression of a phosphatase-inactive mutant or the COOH-terminal SH2 domain of PTP1D causes a dominant negative effect on IFNα/β-induced early response gene expression. These results provide strong evidence that PTP1D functions as a positive regulator of the IFNα/β-induced Jak/Stat signal transduction pathway. Interferons (IFNs) induce early response genes by stimulating Janus family (Jak) tyrosine kinases, leading to tyrosine phosphorylation of Stat (signal transducer and activator of transcription) proteins. Previous studies demonstrated that a protein-tyrosine phosphatase (PTP) is required for activation of the ISGF3 transcription complex by IFNα/β, but the specific PTP responsible remained unidentified. We now show that the SH2 domain containing tyrosine phosphatase PTP1D (also designated as SHPTP2, SHPTP3, PTP2C, or Syp) is constitutively associated with the IFNα/β receptor and becomes tyrosine-phosphorylated in response to ligand. Furthermore, transient expression of a phosphatase-inactive mutant or the COOH-terminal SH2 domain of PTP1D causes a dominant negative effect on IFNα/β-induced early response gene expression. These results provide strong evidence that PTP1D functions as a positive regulator of the IFNα/β-induced Jak/Stat signal transduction pathway." @default.
- W2112106256 created "2016-06-24" @default.
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- W2112106256 date "1996-07-01" @default.
- W2112106256 modified "2023-09-29" @default.
- W2112106256 title "The SH2 Domain-containing Tyrosine Phosphatase PTP1D Is Required for Interferon α/β-induced Gene Expression" @default.
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- W2112106256 doi "https://doi.org/10.1074/jbc.271.27.15862" @default.
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