SHP-1: an SH2-containing ubiquitously expressed tyrosine-specific protein phosphatase. Plays a key role in hematopoiesis. Directly links growth factor receptors and other signaling proteins through protein-tyrosine phosphorylation. The SH2 regions may interact with other cellular components to modulate its own phosphatase activity against interacting substrates. Three alternatively spliced isoforms have been described.
Protein type: Protein phosphatase, tyrosine (non-receptor); EC 3.1.3.48; Motility/polarity/chemotaxis
Cellular Component: cytoplasm; nucleolus; alpha-beta T cell receptor complex; intercellular junction; intracellular; nucleus
Molecular Function: protein binding; hydrolase activity; phosphotyrosine binding; phosphoric monoester hydrolase activity; transmembrane receptor protein tyrosine phosphatase activity; protein tyrosine phosphatase activity; SH2 domain binding; protein kinase binding; phosphoprotein phosphatase activity; SH3 domain binding; natural killer cell lectin-like receptor binding
Biological Process: negative regulation of MAP kinase activity; negative regulation of peptidyl-tyrosine phosphorylation; peptidyl-tyrosine phosphorylation; negative regulation of MAPKKK cascade; natural killer cell mediated cytotoxicity; cytokine and chemokine mediated signaling pathway; negative regulation of T cell receptor signaling pathway; positive regulation of cell adhesion mediated by integrin; signal transduction; protein amino acid dephosphorylation; regulation of release of sequestered calcium ion into cytosol; positive regulation of phosphoinositide 3-kinase cascade; negative regulation of humoral immune response mediated by circulating immunoglobulin; cell proliferation; B cell receptor signaling pathway; negative regulation of T cell proliferation; dephosphorylation; negative regulation of B cell receptor signaling pathway; regulation of B cell differentiation; positive regulation of cell proliferation; abortive mitotic cell cycle; hemopoietic progenitor cell differentiation; platelet formation; cell differentiation
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