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: Transcription factor; DNA binding protein; Motility/polarity/chemotaxis
Molecular Function: signal transducer activity; protein binding; double-stranded DNA binding; calcium ion binding; transcription factor activity
Biological Process: lactation; transcription from RNA polymerase II promoter; mammary gland involution; succinate metabolic process; peptidyl-tyrosine phosphorylation; oxaloacetate metabolic process; positive regulation of interleukin-2 biosynthetic process; T cell differentiation in the thymus; positive regulation of multicellular organism growth; female pregnancy; positive regulation of activated T cell proliferation; fatty acid metabolic process; positive regulation of mitotic cell cycle; 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; development of secondary male sexual characteristics; regulation of steroid metabolic process; creatinine metabolic process; T cell homeostasis; positive regulation of gamma-delta T cell differentiation; regulation of cell adhesion; Peyer's patch development; response to nutrient levels; isoleucine metabolic process; negative regulation of erythrocyte differentiation; cytokine and chemokine mediated signaling pathway; valine metabolic process; citrate metabolic process; regulation of multicellular organism growth; 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; response to ethanol; 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.