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EC 3.3.1.1 Details
EC number
3.3.1.1
Accepted name
adenosylhomocysteinase
Reaction
S-adenosyl-L-homocysteine + H2O = L-homocysteine + adenosine
Other name(s)
S-adenosylhomocysteine synthase, S-adenosylhomocysteine hydrolase (ambiguous), adenosylhomocysteine hydrolase, S-adenosylhomocysteinase, SAHase, AdoHcyase
Systematic name
S-adenosyl-L-homocysteine hydrolase
CAS registry number
9025-54-1
Comment
The enzyme contains one tightly bound NAD+ per subunit. This appears to bring about a transient oxidation at C-3′ of the 5′-deoxyadenosine residue, thus labilizing the thioether bond [2] (for mechanism, click here), cf. EC 5.5.1.4, inositol-3-phosphate synthase.
History
created 1961, modified 2004, deleted 2022
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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
3.3.1 Thioether and trialkylsulfonium hydrolases (deleted sub-subclass)
3.3.1.1 adenosylhomocysteinase
3.3.1.2 S-adenosyl-L-methionine hydrolase (L-homoserine-forming)
3.3.1.3 created 1972, deleted 2001
3.3.2 Ether hydrolases
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
3.7 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
3.11 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