FUNCTION: Regulates G protein-coupled receptor signaling cascades, including signaling via muscarinic acetylcholine receptor CHRM2 and dopamine receptor DRD2. Inhibits signal transduction by increasing the GTPase activity of G protein alpha subunits, thereby driving them into their inactive GDP-boun...
FUNCTION: Regulates G protein-coupled receptor signaling cascades, including signaling via muscarinic acetylcholine receptor CHRM2 and dopamine receptor DRD2. Inhibits signal transduction by increasing the GTPase activity of G protein alpha subunits, thereby driving them into their inactive GDP-bound form (PubMed:15096504). Binds selectively to GNAZ and GNAI2 subunits, accelerates their GTPase activity and regulates their signaling activities. Negatively regulates mu-opioid receptor-mediated activation of the G-proteins (By similarity). {ECO:0000250|UniProtKB:Q9QZB0, ECO:0000269|PubMed:15096504}.
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GO - Biological processes (BP):
G protein-coupled receptor signaling pathway [GO:0007186]; negative regulation of signal transduction [GO:0009968]...
G protein-coupled receptor signaling pathway [GO:0007186]; negative regulation of signal transduction [GO:0009968]
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GO - Molecular function (MF):
GTPase activator activity [GO:0005096]; GTPase activity [GO:0003924]...
GTPase activator activity [GO:0005096]; GTPase activity [GO:0003924]
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GO - Cellular component (CC):
cytoplasm [GO:0005737]; neuron projection [GO:0043005]; nucleus [GO:0005634]; plasma membrane [GO:0005886]; synapse [GO:0045202]...
cytoplasm [GO:0005737]; neuron projection [GO:0043005]; nucleus [GO:0005634]; plasma membrane [GO:0005886]; synapse [GO:0045202]
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