STAT1 Signal transducer and transcription activator that mediates cellular responses to interferons (IFNs), cytokine KITLG/SCF and other cytokines and other growth factors. Following type I IFN (IFN-alpha and IFN-beta) binding to cell surface receptors, signaling via protein kinases leads to activation of Jak kinases (TYK2 and JAK1) and to tyrosine phosphorylation of STAT1 and STAT2. The phosphorylated STATs dimerize and associate with ISGF3G/IRF-9 to form a complex termed ISGF3 transcription factor, that enters the nucleus. ISGF3 binds to the IFN stimulated response element (ISRE) to activate the transcription of IFN-stimulated genes (ISG), which drive the cell in an antiviral state. In response to type II IFN (IFN-gamma), STAT1 is tyrosine- and serine-phosphorylated. It then forms a homodimer termed IFN-gamma-activated factor (GAF), migrates into the nucleus and binds to the IFN gamma activated sequence (GAS) to drive the expression of the target genes, inducing a cellular antiviral state. Becomes activated in response to KITLG/SCF and KIT signaling. May mediate cellular responses to activated FGFR1, FGFR2, FGFR3 and FGFR4. Belongs to the transcription factor STAT family. 2 alternatively spliced human isoforms have been reported. Note: This description may include information from UniProtKB.
Protein type: DNA-binding; Transcription factor
Chromosomal Location of Human Ortholog: 9q22
Cellular Component:  axon; cytoplasm; cytosol; dendrite; nuclear chromatin; nucleolus; nucleoplasm; nucleus; perinuclear region of cytoplasm; protein-containing complex
Molecular Function:  CCR5 chemokine receptor binding; DNA binding; DNA-binding transcription activator activity, RNA polymerase II-specific; DNA-binding transcription factor activity; DNA-binding transcription factor activity, RNA polymerase II-specific; double-stranded DNA binding; enzyme binding; histone acetyltransferase binding; histone binding; identical protein binding; nuclear hormone receptor binding; promoter-specific chromatin binding; protein homodimerization activity; protein phosphatase 2A binding; repressing transcription factor binding; RNA polymerase II core promoter sequence-specific DNA binding; RNA polymerase II proximal promoter sequence-specific DNA binding; sequence-specific DNA binding; tumor necrosis factor receptor binding; ubiquitin-like protein ligase binding
Biological Process:  activation of cysteine-type endopeptidase activity involved in apoptotic process; blood circulation; cellular response to cytokine stimulus; cellular response to insulin stimulus; cellular response to interferon-beta; cellular response to interferon-gamma; cellular response to lipopolysaccharide; cellular response to organic cyclic compound; cytokine-mediated signaling pathway; defense response; defense response to virus; interferon-gamma-mediated signaling pathway; JAK-STAT cascade; lipopolysaccharide-mediated signaling pathway; macrophage derived foam cell differentiation; negative regulation by virus of viral protein levels in host cell; negative regulation of angiogenesis; negative regulation of endothelial cell proliferation; negative regulation of I-kappaB kinase/NF-kappaB signaling; negative regulation of macrophage fusion; positive regulation of cell proliferation; positive regulation of defense response to virus by host; positive regulation of erythrocyte differentiation; positive regulation of interferon-alpha production; positive regulation of nitric-oxide synthase biosynthetic process; positive regulation of smooth muscle cell proliferation; positive regulation of transcription by RNA polymerase II; positive regulation of transcription, DNA-templated; regulation of cell proliferation; regulation of transcription, DNA-templated; renal tubule development; response to bacterium; response to cAMP; response to cytokine; response to drug; response to exogenous dsRNA; response to hydrogen peroxide; response to interferon-beta; response to lipopolysaccharide; response to mechanical stimulus; response to nutrient; response to organic cyclic compound; response to peptide hormone; response to type I interferon; transcription, DNA-templated; tumor necrosis factor-mediated signaling pathway; type I interferon signaling pathway
Reference #:  Q9QXK0 (UniProtKB)
Alt. Names/Synonyms: Signal transducer and activator of transcription; Signal transducer and activator of transcription 1; Stat1
Gene Symbols: Stat1
Molecular weight: 87,234 Da
Basal Isoelectric point: 5.58  Predict pI for various phosphorylation states
CST Pathways:  ErbB/HER Signaling  |  Growth And Differentiation Control by MAPKs  |  IL6 Signaling  |  Inhibition of Apoptosis  |  Regulation of P38 MAPKs
Protein-Specific Antibodies, siRNAs or Recombinant Proteins from Cell Signaling Technology® Total Proteins
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Protein Structure Not Found.

Cross-references to other databases:  STRING  |  Reactome  |  BioGPS  |  Pfam  |  Phospho.ELM  |  NetworKIN  |  UniProtKB  |  Entrez-Gene  |  Ensembl Gene