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Guanine nucleotide-binding protein G(s) subunit alpha isoforms short

UniProtKB accession:  P63095
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Polymer Entities matching query 2
Go to UniProtKB:  P63095
UniProtKB description:  Guanine nucleotide-binding proteins (G proteins) function as transducers in numerous signaling pathways controlled by G protein-coupled receptors (GPCRs). The alpha chain contains the guanine nucleotide binding site and alternates between an active, GTP-bound state and an inactive, GDP-bound state. Signaling by an activated GPCR promotes GDP release and GTP binding. The alpha subunit has a low GTPase activity that converts bound GTP to GDP, thereby terminating the signal. Both GDP release and GTP hydrolysis are modulated by numerous regulatory proteins. Signaling involves the activation of adenylyl cyclases, resulting in increased levels of the signaling molecule cAMP. Functions downstream of beta-adrenergic receptors. Stimulates the Ras signaling pathway via RAPGEF2.
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Function
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GO Molecular Function
[ 8+ ]
GO Biological Process
[ 29+ ]
GO Cellular Component
[ 5+ ]