ID   3.6.5.1
DE   heterotrimeric G-protein GTPase.
CA   GTP + H2O = GDP + H(+) + phosphate.
CC   -!- This group comprises GTP-hydrolyzing systems, where GTP and GDP
CC       alternate in binding.
CC   -!- This group includes stimulatory and inhibitory G-proteins such as Gs,
CC       Gi, Go and Golf, targeting adenylate cyclase and/or K(+) and Ca(2+)
CC       channels; Gq stimulating phospholipase C; transducin activating cGMP
CC       phosphodiesterase; gustducin activating cAMP phosphodiesterase.
CC   -!- Golf is instrumental in odor perception, transducin in vision and
CC       gustducin in taste recognition.
CC   -!- At least 16 different alpha subunits (39-52 kDa), 5 beta subunits (36
CC       kDa) and 12 gamma subunits (6-9 kDa) are known.
CC   -!- Formerly EC 3.6.1.46.
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