CST, 4481S, Phospho-PTP alpha (Tyr789) Antibody

Polyclonal Antibody for studying PTPalpha (Tyr798) phosphate. Validated for Western Blotting,Immunoprecipitation. Highly specific and rigorously validated in-house, Phospho-PTP alpha (Tyr789) Antibody (CST #4481) is ready to ship. Product Usage Information Western Blotting: 1:1000 Immunoprecipitation: 1:50 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting, Immunoprecipitation Specificity / Sensitivity Phospho-PTP alpha (Tyr789) Antibody detects endogenous levels of PTPα only when phosphorylated at Tyr789. This antibody does not cross-react with other phosphorylated receptor tyrosine phosphatases. Species Reactivity: Human, Mouse, Rat, Monkey Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Tyr789 of human PTPα. Antibodies are purified by protein A and peptide affinity chromatography. Background PTPα (PTPRA) is a transmembrane receptor tyrosine phosphatase implicated in the regulation of Src family kinases during the G2 to mitosis entry point. Two identified splice variants differ in the size of the extracellular region; the shorter form appears to be ubiquitously expressed while the larger protein is more limited in distribution (1). The cytoplasmic region of PTPα contains two putative catalytic domains. One phosphatase domain (D1) exhibits catalytic activity while the other (D2) may regulate phosphatase activity by allowing receptor dimer formation (2,3). PTPα is a physiological regulator of Src and Src family kinases (4). Constitutive phosphorylation of the carboxy-terminal Tyr789 of PTPα is essential for dephosphorylation of Src at Tyr527. Phosphorylation of PTPα at this residue also allows binding of the Grb2 inhibitor, restricting PTPα activation of Src (5,6). PKC-mediated phosphorylation of the PTP at Ser180 and Ser204 also increases PTPα phosphatase activity (7). Alternate Names HEPTP; HLPR; HPTPA; HPTPalpha; Leukocyte common antigen-related peptide (protein tyrosine phosphate); LRP; protein tyrosine phosphatase receptor type A; protein tyrosine phosphatase, receptor type, A; protein tyrosine phosphatase, receptor type, alpha polypeptide; Protein-tyrosine phosphatase alpha; PTPA; PTPase-alpha; PTPLCA-related phosphatase; PTPRA; PTPRL2; R-PTP-alpha; Receptor-type tyrosine-protein phosphatase alpha; RPTPA; tyrosine phosphatase alpha Specification REACTIVITY: H M R Mk SENSITIVITY: Endogenous MW (kDa): 145 SOURCE: Rabbit