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Protein Page:
DARPP-32 (human)

DARPP-32 a member of the protein phosphatase inhibitor 1 family. A dopamine- and cyclic AMP-regulated neuronal phosphoprotein. Both dopaminergic and glutamatergic (NMDA) receptor stimulation regulate the extent of DARPP32 phosphorylation, but in opposite directions. Dopamine D1 receptor stimulation enhances cAMP formation, resulting in the phosphorylation of DARPP32; phosphorylated DARPP32 is a potent protein phosphatase-1 inhibitor. NMDA receptor stimulation elevates intracellular calcium, which leads to activation of calcineurin and dephosphorylation of phospho-DARPP32, thereby reducing the phosphatase-1 inhibitory activity of DARPP32. Two alternatively-spliced isoforms have been described. Note: This description may include information from UniProtKB.
Protein type: Motility/polarity/chemotaxis; Protein phosphatase, regulatory subunit
Chromosomal Location of Human Ortholog: 17q12
Cellular Component: cytoplasm; cytosol
Molecular Function: cAMP-dependent protein kinase inhibitor activity; protein kinase inhibitor activity; protein phosphatase inhibitor activity; protein phosphatase type 1 regulator activity; type 1 serine/threonine specific protein phosphatase inhibitor activity
Biological Process: signal transduction
Reference #:  Q9UD71 (UniProtKB)
Alt. Names/Synonyms: 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 subunit 1B; protein phosphatase 1, regulatory (inhibitor) subunit 1B; protein phosphatase 1, regulatory (inhibitor) subunit 1B (dopamine and cAMP regulated phosphoprotein, DARPP-32)
Gene Symbols: PPP1R1B
Molecular weight: 22,963 Da
Basal Isoelectric point: 4.48  Predict pI for various phosphorylation states
CST Pathways:  Parkinson's Disease
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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Protein Structure Not Found.

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