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Description for Protein PPP1R1B

protein phosphatase 1, regulatory (inhibitor) subunit 1B
7 total interacting proteins; 7 platelet interacting proteins
Icon Book Platelet Evidence (proteome studies/others : 0/0)
(Not detected in platelets)
Summary:
Midbrain dopaminergic neurons play a critical role in multiple brain functions, and abnormal signaling through dopaminergic pathways has been implicated in several major neurologic and psychiatric disorders. One well-studied target for the actions of dopamine is DARPP32. In the densely dopamine- and glutamate-innervated rat caudate-putamen, DARPP32 is expressed in medium-sized spiny neurons (Ouimet and Greengard, 1990 [PubMed 2191086]) that also express dopamine D1 receptors (Walaas and Greengard, 1984 [PubMed 6319627]). The function of DARPP32 seems to be regulated by receptor stimulation. Both dopaminergic and glutamatergic (NMDA) receptor stimulation regulate the extent of DARPP32 phosphorylation, but in opposite directions (Halpain et al., 1990 [PubMed 2153935]). Dopamine D1 receptor stimulation enhances cAMP formation, resulting in the phosphorylation of DARPP32 (Walaas and Greengard, 1984 [PubMed 6319627]); phosphorylated DARPP32 is a potent protein phosphatase-1 (see MIM 176875) inhibitor (Hemmings et al., 1984 [PubMed 6087160]). 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 (Halpain et al., 1990 [PubMed 2153935]).[supplied by OMIM] (PubMed Links)
Domains and Motifs:
  • CC: Coiled Coil
    • Gene Ontology:
    Gene Ontology Annotations
    KEGG - Enzyme ID(s):
    3.1.3.16
    KEGG - Orthology:
    K01090
    KEGG - Pathway(s):
    None Available
    Nomenclature / Alternative Names:
    Protein phosphatase 1, regulatory (inhibitor) subunit 1B isoform 1; Protein phosphatase 1, regulatory (inhibitor) subunit 1B isoform 2; EC 3.1.3.16; Dopamine and cAMP regulated phosphoprotein, 32kD; DARPP32; Dopamine and Camp regulated neuronal phosphoprotein 32; FLJ20940
    Approved Symbol:
    PPP1R1B
    (De-) Phosphorylations:
    Total (de-) phosphorylation sites: 13
    Human (de-) phosphorylation sites: 13; No platelet phosphorylation sites
    Phosphorylation Targets:
    Total phosphorylation targets: 0
    Human phosphorylation targets: 0;Predicted platelet targets: 0
    		Protein Characteristics:
    Isoform-specific Information
    Icon DrugsAssociated Drugs (DrugBank Accession):

    None Available

    Associated Genetic Diseases:

    None Available
    		Predicted Transmembrane Domains:
  • Isoform 2 : 0
  • Isoform 1 : 0
    • Additional Identifiers:

    HPRD: 05097 Entrez Gene ID: 84152 OMIM ID: 604399 Swissprot Accession: Q9UD71; B3KVQ9;