CST, 3401S, Phospho-DARPP-32 (Ser97) (D11A5) Rabbit Monoclonal Antibody

Monoclonal Antibody for studying DARPP-32 (Ser102) phosphate. Validated for Western Blotting,Immunoprecipitation. Available in 2 sizes. Highly specific and rigorously validated in-house, Phospho-DARPP-32 (Ser97) (D11A5) Rabbit Monoclonal Antibody (CST #3401) 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, 50% glycerol and less than 0.02% sodium azide. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting, Immunoprecipitation Specificity / Sensitivity Phospho-DARPP-32 (Ser97) (D11A5) Rabbit Monoclonal Antibody detects endogenous levels of DARPP-32 only when phosphorylated at Ser97. Species Reactivity: Human, Mouse, Rat Source / Purification Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser102 of human DARPP-32 protein (equivalent to Ser97 of mouse DARPP-32 protein). Background DARPP-32 (dopamine and cyclic AMP-regulated phosphoprotein, relative molecular mass 32,000) is a cytosolic protein highly enriched in medium-sized spiny neurons of the neostriatum (1). It is a bifunctional signaling molecule that controls serine/threonine kinase and serine/threonine phosphatase activity (2). Dopamine stimulates phosphorylation of DARPP-32 through D1 receptors and activation of PKA. PKA phosphorylation of DARPP-32 at Thr34 converts it into an inhibitor of protein phosphatase 1 (1). DARPP-32 is converted into an inhibitor of PKA when phosphorylated at Thr75 by cyclin-dependent kinase 5 (CDK5) (2). Mice containing a targeted deletion of the DARPP-32 gene exhibit an altered biochemical, electrophysiological, and behavioral phenotype (3). Drugs of abuse such as cocaine and food reinforcement learning activate the dopamine D1 receptor-signaling cascade. The downstream effector DARPP-32 is dephosphorylated at Ser97 inhibiting its nuclear export. This enables DARPP-32 to function as an inhibitor of protein phosphatase-1, increasing phosphorylation of histone H3 at Ser10. Knock-in mice bearing a DARPP-32 Ser97 to Ala (S97A) mutation demonstrate changed behavioral effects to drugs of abuse and a decreased motivation for food (4). Alternate Names DARPP-32; DARPP32; dopamine and cAMP regulated phosphoprotein; dopamine and cAMP-regulated neuronal phosphoprotein 32; Dopamine- and cAMP-regulated neuronal phosphoprotein; FLJ20940; PPP1R1B; PPR1B; protein phosphatase 1 regulatory inhibitor subunit 1B; Protein phosphatase 1 regulatory subunit 1B; protein phosphatase 1, regulatory (inhibitor) subunit 1B; protein phosphatase 1, regulatory (inhibitor) subunit 1B (dopamine and cAMP regulated phosphoprotein, DARPP-32) Specification REACTIVITY: H M R SENSITIVITY: Endogenous MW (kDa): 32 Source/Isotype: Rabbit IgG