STAT5A Blocking Peptide

The protein encoded by this gene is a member of the STAT family of transcription factors. In response to cytokines and growth factors, STAT family members are phosphorylated by the receptor associated kinases, and then form homo- or heterodimers that translocate to the cell nucleus where they act as transcription activators. This protein is activated by, and mediates the responses of many cell ligands, such as IL2, IL3, IL7 GM-CSF, erythropoietin, thrombopoietin, and different growth hormones. Activation of this protein in myeloma and lymphoma associated with a TEL/JAK2 gene fusion is independent of cell stimulus and has been shown to be essential for tumorigenesis. The mouse counterpart of this gene is found to induce the expression of BCL2L1/BCL-X(L), which suggests the antiapoptotic function of this gene in cells. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Dec 2013]

STAT5A: 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.

Protein type: Motility/polarity/chemotaxis; Oncoprotein; Transcription factor; DNA-binding

Chromosomal Location of Human Ortholog: 17q11.2

Cellular Component: nucleoplasm; cytosol

Molecular Function: signal transducer activity; protein binding; transcription factor activity

Biological Process: lactation; succinate metabolic process; peptidyl-tyrosine phosphorylation; oxaloacetate metabolic process; positive regulation of interleukin-2 biosynthetic process; T cell differentiation in the thymus; female pregnancy; positive regulation of multicellular organism growth; fatty acid metabolic process; positive regulation of mitotic cell cycle; positive regulation of activated T cell proliferation; 2-oxoglutarate metabolic process; positive regulation of natural killer cell differentiation; sequestering of lipid; negative regulation of mast cell apoptosis; natural killer cell differentiation; allantoin metabolic process; 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; Peyer's patch development; isoleucine metabolic process; negative regulation of erythrocyte differentiation; transcription, DNA-dependent; 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; 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