The series of molecular signals initiated by a ligand binding to its receptor, in which the activated receptor promotes the exchange of GDP for GTP on the alpha-subunit of an associated heterotrimeric G-protein complex. The GTP-bound activated alpha-G-protein then dissociates from the beta- and gamma-subunits to further transmit the signal within the cell. The pathway begins with receptor-ligand interaction, and ends with regulation of a downstream cellular process. The pathway can start from the plasma membrane, Golgi or nuclear membrane.
Synonyms:
exact_synonym:
G protein coupled receptor protein signaling pathway; G protein coupled receptor protein signalling pathway; G-protein coupled receptor protein signal transduction; G-protein coupled receptor signalling pathway; GPCR signaling pathway; GPCR signalling pathway