a receptor type protein tyrosine phosphatase protein. Contains an extracellular domain, a single transmembrane segment and two tandem intracytoplasmic catalytic domains. The first PTPAse domain has enzymatic activity, while the second one seems to affect the substrate specificity of the first one. Specifically expressed in hematopoietic cells. An essential regulator of T- and B-cell antigen receptor signaling. Functions through either direct interaction with components of the antigen receptor complexes, or by activating various Src family kinases required for the antigen receptor signaling. Suppresses JAK kinases, and thus functions as a regulator of cytokine receptor signaling. Four alternatively spliced isoforms have been described. Note: This description may include information from UniProtKB.
Protein type: EC 220.127.116.11; Motility/polarity/chemotaxis; Receptor protein phosphatase, tyrosine; Membrane protein, integral
Cellular Component: cell surface; external side of plasma membrane; focal adhesion; integral to plasma membrane; intracellular; lipid raft; membrane; plasma membrane
Molecular Function: protein binding; protein kinase binding; protein tyrosine phosphatase activity; transmembrane receptor protein tyrosine phosphatase activity
Biological Process: B cell proliferation; B cell receptor signaling pathway; bone marrow development; cell surface receptor linked signal transduction; defense response to virus; dephosphorylation; hemopoietic progenitor cell differentiation; immunoglobulin biosynthetic process; negative regulation of cytokine and chemokine mediated signaling pathway; negative regulation of protein kinase activity; negative regulation of T cell mediated cytotoxicity; positive regulation of antigen receptor-mediated signaling pathway; positive regulation of B cell proliferation; positive regulation of protein kinase activity; positive regulation of T cell proliferation; protein amino acid dephosphorylation; regulation of cell cycle; release of sequestered calcium ion into cytosol; stem cell development; substrate-bound cell migration, cell release from substrate; T cell differentiation; T cell receptor signaling pathway
LTP: 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.