Heterotrimeric GTP-Binding Proteins

G-Proteins, Heterotrimeric; GTP-Binding Proteins, Heterotrimeric; Heterotrimeric G Proteins; Heterotrimeric GTP Binding Proteins
GTP-BINDING PROTEINS that contain three non-identical subunits. They are found associated with members of the seven transmembrane domain superfamily of G-PROTEIN-COUPLED RECEPTORS. Upon activation the GTP-BINDING PROTEIN ALPHA SUBUNIT of the complex dissociates leaving a dimer of a GTP-BINDING PROTEIN BETA SUBUNIT bound to a GTP-BINDING PROTEIN GAMMA SUBUNIT.