CST, 4563S, Phospho-MYPT1 (Thr853) Antibody

Polyclonal Antibody for studying MYPT1 (Thr853) phosphate. Validated for Western Blotting. Available in 2 sizes. Highly specific and rigorously validated in-house, Phospho-MYPT1 (Thr853) Antibody (CST #4563) is ready to ship. Product Usage Information Western Blotting: 1:1000 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 Specificity / Sensitivity Phospho-MYPT1 (Thr853) Antibody detects endogenous levels of MYPT1 only when phosphorylated at Thr853. This antibody cross-reacts with an unidentified protein at 40 kDa. Species Reactivity: Human, Mouse, Rat, Hamster, Monkey, Dog Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Thr853 of human MYPT1. Antibodies are purified using protein A and peptide affinity chromatography. Background Protein phosphatase 1 (PP1) is a ubiquitous eukaryotic protein serine/threonine phosphatase involved in the regulation of various cell functions. Substrate specificity is determined by the binding of a regulatory subunit to the PP1 catalytic subunit (PP1c). It is estimated that over fifty different regulatory subunits exist (1).The myosin phosphatase holoenzyme is composed of three subunits: PP1c, a targeting/regulatory subunit (MYPT/myosin-binding subunit of myosin phosphatase), and a 20 kDa subunit of unknown function (M20). MYPT binding to PP1cδ alters the conformation of the catalytic cleft and increases enzyme activity and specificity (2). Two MYPT isoforms that are 61% identical have been described. MYPT1 is widely expressed, while MYPT2 expression appears to be exclusive to heart and brain (3). Related family members include MBS85, MYPT3, and TIMAP (4).Myosin phosphatase regulates the interaction of actin and myosin in response to signaling through the small GTPase Rho. Rho activity inhibits myosin phosphatase via Rho-associated kinase (ROCK). Phosphorylation of MYPT1 at Thr696 and Thr853 results in phosphatase inhibition and cytoskeletal reorganization (5,6). Alternate Names GUBS; M130; MBS; MGC133042; myosin binding subunit; Myosin phosphatase target subunit 1; Myosin phosphatase-targeting subunit 1; myosin phosphatase, target subunit 1; MYPT1; PPP1R12A; Protein phosphatase 1 regulatory subunit 12A; protein phosphatase 1, regulatory (inhibitor) subunit 12A; Protein phosphatase myosin-binding subunit Specification REACTIVITY: H M R Hm Mk Dg SENSITIVITY: Endogenous MW (kDa): 140 SOURCE: Rabbit