transcription factor of the STAT family. Phosphorylated and activated by receptor-associated kinases downstream of many cytokines and growth-factor receptors. Activation of this protein in myeloma and lymphoma associated with a TEL/JAK2 fusion protein is essential for the tumorigenesis. Induces the expression of BCL2L1/BCL-X(L) in the mouse, suggesting an antiapoptotic function of this protein. Forms homo- or heterodimers that translocate into the nucleus where they regulate transcription. Two alternatively spliced isoforms have been described. Note: This description may include information from UniProtKB.
Protein type: Motility/polarity/chemotaxis; Transcription factor; DNA binding protein
Cellular Component: nucleoplasm; cytosol
Molecular Function: protein binding; signal transducer activity; calcium ion binding; transcription factor activity
Biological Process: lactation; succinate metabolic process; oxaloacetate metabolic process; peptidyl-tyrosine phosphorylation; positive regulation of interleukin-2 biosynthetic process; T cell differentiation in the thymus; female pregnancy; positive regulation of multicellular organism growth; positive regulation of activated T cell proliferation; positive regulation of mitotic cell cycle; fatty acid metabolic process; 2-oxoglutarate metabolic process; positive regulation of natural killer cell differentiation; sequestering of lipid; natural killer cell differentiation; allantoin metabolic process; negative regulation of mast cell apoptosis; luteinization; regulation of steroid metabolic process; development of secondary male sexual characteristics; creatinine metabolic process; T cell homeostasis; positive regulation of gamma-delta T cell differentiation; regulation of cell adhesion; Peyer's patch development; isoleucine metabolic process; negative regulation of erythrocyte differentiation; transcription, DNA-dependent; valine metabolic process; regulation of multicellular organism growth; citrate metabolic process; development of secondary female sexual characteristics; JAK-STAT cascade; positive regulation of natural killer cell mediated cytotoxicity; creatine metabolic process; regulation of transcription from RNA polymerase II promoter; regulation of epithelial cell differentiation; positive regulation of B cell differentiation; positive regulation of transcription from RNA polymerase II promoter; taurine metabolic process; positive regulation of inflammatory response
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.