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EC 3.6.5.1 Details
EC number
3.6.5.1
Accepted name
heterotrimeric G-protein GTPase
Reaction
GTP + H2O = GDP + phosphate
Systematic name
GTP phosphohydrolase (signalling)
Comment
This group comprises GTP-hydrolysing systems, where GTP and GDP alternate in binding. This group includes stimulatory and inhibitory G-proteins such as Gs, Gi, Go and Golf, targetting adenylate cyclase and/or K+ and Ca2+ channels; Gq stimulating phospholipase C; transducin activating cGMP phosphodiesterase; gustducin activating cAMP phosphodiesterase. Golf is instrumental in odour perception, transducin in vision and gustducin in taste recognition. At least 16 different α subunits (39-52 kDa), 5 β subunits (36 kDa) and 12 γ subunits (6-9 kDa) are known.
History
created 2000 as EC 3.6.1.46, transferred 2003 to EC 3.6.5.1
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EC Tree
1 Oxidoreductases
2 Transferases
3 Hydrolases
3.1 Acting on ester bonds
3.2 Glycosylases
3.3 Acting on ether bonds
3.4 Acting on peptide bonds (peptidases)
3.5 Acting on carbon-nitrogen bonds, other than peptide bonds
3.6 Acting on acid anhydrides
3.6.1 In phosphorus-containing anhydrides
3.6.1.1 inorganic diphosphatase
3.6.1.2 trimetaphosphatase
3.6.1.3 adenosinetriphosphatase
3.6.1.4 created 1961, deleted 1965
3.6.1.5 apyrase
3.6.1.6 nucleoside diphosphate phosphatase
3.6.1.7 acylphosphatase
3.6.1.8 ATP diphosphatase
3.6.1.9 nucleotide diphosphatase
3.6.1.10 endopolyphosphatase
3.6.1.11 exopolyphosphatase
3.6.1.12 dCTP diphosphatase
3.6.1.13 ADP-ribose diphosphatase
3.6.1.14 adenosine-tetraphosphatase
3.6.1.15 nucleoside-triphosphate phosphatase
3.6.1.16 CDP-glycerol diphosphatase
3.6.1.17 bis(5′-nucleosyl)-tetraphosphatase (asymmetrical)
3.6.1.18 FAD diphosphatase
3.6.1.19 nucleoside-triphosphate diphosphatase
3.6.1.20 5′-acylphosphoadenosine hydrolase
3.6.1.21 ADP-sugar diphosphatase
3.6.1.22 NAD+ diphosphatase
3.6.1.23 dUTP diphosphatase
3.6.1.24 nucleoside phosphoacylhydrolase
3.6.1.25 triphosphatase
3.6.1.26 CDP-diacylglycerol diphosphatase
3.6.1.27 undecaprenyl-diphosphate phosphatase
3.6.1.28 thiamine-triphosphatase
3.6.1.29 bis(5′-adenosyl)-triphosphatase
3.6.1.30 m7G(5′)pppN diphosphatase
3.6.1.31 phosphoribosyl-ATP diphosphatase
3.6.1.32 created 1984, deleted 2000
3.6.1.33 created 1984, deleted 2000
3.6.1.34 created 1984, deleted 2000
3.6.1.35 created 1984, deleted 2000
3.6.1.36 created 1984, deleted 2000
3.6.1.37 created 1984, deleted 2000
3.6.1.38 created 1984, deleted 2000
3.6.1.39 thymidine-triphosphatase
3.6.1.40 guanosine-5′-triphosphate,3′-diphosphate phosphatase
3.6.1.41 bis(5′-nucleosyl)-tetraphosphatase (symmetrical)
3.6.1.42 guanosine-diphosphatase
3.6.1.43 dolichyldiphosphatase
3.6.1.44 oligosaccharide-diphosphodolichol diphosphatase
3.6.1.45 UDP-sugar diphosphatase
3.6.1.46 created 2000, deleted 2003
3.6.1.47 created 2000, deleted 2003
3.6.1.48 created 2000, deleted 200
3.6.1.49 created 2000, deleted 2003
3.6.1.50 created 2000, deleted 2003
3.6.1.51 created 2000, deleted 2003
3.6.1.52 diphosphoinositol-polyphosphate diphosphatase
3.6.1.53 Mn2+-dependent ADP-ribose/CDP-alcohol diphosphatase
3.6.1.54 UDP-2,3-diacylglucosamine diphosphatase
3.6.1.55 8-oxo-dGTP diphosphatase
3.6.1.56 2-hydroxy-dATP diphosphatase
3.6.1.57 UDP-2,4-diacetamido-2,4,6-trideoxy-β-L-altropyranose hydrolase
3.6.1.58 8-oxo-dGDP phosphatase
3.6.1.59 5′-(N7-methyl 5′-triphosphoguanosine)-[mRNA] diphosphatase
3.6.1.60 diadenosine hexaphosphate hydrolase (AMP-forming)
3.6.1.61 diadenosine hexaphosphate hydrolase (ATP-forming)
3.6.1.62 5′-(N7-methylguanosine 5′-triphospho)-[mRNA] hydrolase
3.6.1.63 α-D-ribose 1-methylphosphonate 5-triphosphate diphosphatase
3.6.1.64 inosine diphosphate phosphatase
3.6.1.65 (d)CTP diphosphatase
3.6.1.66 XTP/dITP diphosphatase
3.6.1.67 dihydroneopterin triphosphate diphosphatase
3.6.1.68 geranyl diphosphate phosphohydrolase
3.6.1.69 8-oxo-(d)GTP phosphatase
3.6.1.70 guanosine-5′-diphospho-5′-[DNA] diphosphatase
3.6.1.71 adenosine-5′-diphospho-5′-[DNA] diphosphatase
3.6.1.72 DNA-3′-diphospho-5′-guanosine diphosphatase
3.6.1.73 inosine/xanthosine triphosphatase
3.6.1.74 mRNA 5′-phosphatase
3.6.1.75 diacylglycerol diphosphate phosphatase
3.6.2 In sulfonyl-containing anhydrides
3.6.3 Acting on acid anhydrides to catalyse transmembrane movement of substances
3.6.4 Acting on acid anhydrides to facilitate cellular and subcellular movement
3.6.5 Acting on GTP to facilitate cellular and subcellular movement
3.6.5.1 heterotrimeric G-protein GTPase
3.6.5.2 small monomeric GTPase
3.6.5.3 protein-synthesizing GTPase
3.6.5.4 signal-recognition-particle GTPase
3.6.5.5 dynamin GTPase
3.6.5.6 tubulin GTPase
3.7 Acting on carbon-carbon bonds
3.8 Acting on halide bonds
3.9 Acting on phosphorus-nitrogen bonds
3.10 Acting on sulfur-nitrogen bonds
3.10.1 Acting on sulfur-nitrogen bonds (only sub-subclass identified to date)
3.11 Acting on carbon-phosphorus bonds
3.12 Acting on sulfur-sulfur bonds
3.13 Acting on carbon-sulfur bonds
4 Lyases
5 Isomerases
6 Ligases
7 Translocases