CST, 29957S, Phospho-Tau (Ser199) Antibody

Polyclonal Antibody for studying Tau iso8 (Ser199) phosphate. Validated for Western Blotting. Highly specific and rigorously validated in-house, Phospho-Tau (Ser199) Antibody (CST #29957) 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-Tau (Ser199) Antibodyrecognizes endogenous levels of Tau protein only when phosphorylated at Ser199. This antibody also detects a 110 kDa band of unknown origin. Species Reactivity: Human, Mouse, Rat Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ser199 of human Tau protein. Antibodies are purified by protein A and peptide affinity chromatography. Background Tau is a heterogeneous microtubule-associated protein that promotes and stabilizes microtubule assembly, especially in axons. Six isoforms with different amino-terminal inserts and different numbers of tandem repeats near the carboxy terminus have been identified, and tau is hyperphosphorylated at approximately 25 sites by Erk, glycogen synthase kinase-3 (GSK-3), and CDK5 (1,2). Phosphorylation decreases the ability of tau to bind to microtubules. Neurofibrillary tangles are a major hallmark of Alzheimer's disease (AD); these tangles are bundles of paired helical filaments (PHFs) composed of hyperphosphorylated tau. In particular, phosphorylation at Ser396 by GSK-3 or CDK5 destabilizes microtubules. Furthermore, research studies have shown that inclusions of tau are found in a number of other neurodegenerative diseases, collectively known as tauopathies (1,3). Ser199 of Tau is phosphorylated by various kinases such as GSK-3β, AMP-activated protein kinase (AMPK), and dual specificity tyrosine-phosphorylation-regulated kinase 1A (Dyrk1A) (4-7). Phosphorylation of Ser199 of Tau is an early event in the pathogenesis of Alzheimer's disease (8,9). Alternate Names DDPAC; FLJ31424; FTDP-17; G protein beta1/gamma2 subunit-interacting factor 1; MAPT; MAPTL; MGC138549; microtubule associated protein tau; Microtubule-associated protein tau; MSTD; MTBT1; MTBT2; Neurofibrillary tangle protein; Paired helical filament-tau; PHF-tau; PPND; PPP1R103; protein phosphatase 1, regulatory subunit 103; TAU; Tau iso8 Specification REACTIVITY: H M R SENSITIVITY: Endogenous MW (kDa): 50-80 SOURCE: Rabbit