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EC Tree
1 Oxidoreductases
1.1 Acting on the CH-OH group of donors
1.1.1 With NAD
+
or NADP
+
as acceptor
1.1.2 With a cytochrome as acceptor
1.1.3 With oxygen as acceptor
1.1.4 With a disulfide as acceptor
1.1.5 With a quinone or similar compound as acceptor
1.1.7 With an iron-sulfur protein as acceptor
1.1.9 With a copper protein as acceptor
1.1.98 With other, known, physiological acceptors
1.1.99 With unknown physiological acceptors
1.2 Acting on the aldehyde or oxo group of donors
1.3 Acting on the CH-CH group of donors
1.3.1 With NAD
+
or NADP
+
as acceptor
1.3.1.1 dihydropyrimidine dehydrogenase (NAD
+
)
1.3.1.2 dihydropyrimidine dehydrogenase (NADP
+
)
1.3.1.3 Δ
4
-3-oxosteroid 5β-reductase
1.3.1.4 cortisone α-reductase
1.3.1.5 cucurbitacin Δ
23
-reductase
1.3.1.6 fumarate reductase (NADH)
1.3.1.7
meso
-tartrate dehydrogenase
1.3.1.8 acyl-CoA dehydrogenase (NADP
+
)
1.3.1.9 enoyl-[acyl-carrier-protein] reductase (NADH)
1.3.1.10 enoyl-[acyl-carrier-protein] reductase (NADPH,
Si
-specific)
1.3.1.11 2-coumarate reductase
1.3.1.12 prephenate dehydrogenase
1.3.1.13 prephenate dehydrogenase (NADP
+
)
1.3.1.14 dihydroorotate dehydrogenase (NAD
+
)
1.3.1.15 dihydroorotate dehydrogenase (NADP
+
)
1.3.1.16 β-nitroacrylate reductase
1.3.1.17 3-methyleneoxindole reductase
1.3.1.18 kynurenate-7,8-dihydrodiol dehydrogenase
1.3.1.19
cis
-1,2-dihydrobenzene-1,2-diol dehydrogenase
1.3.1.20
trans
-1,2-dihydrobenzene-1,2-diol dehydrogenase
1.3.1.21 7-dehydrocholesterol reductase
1.3.1.22 3-oxo-5α-steroid 4-dehydrogenase (NADP
+
)
1.3.1.23 created 1972, deleted 2005
1.3.1.24 biliverdin reductase
1.3.1.25 1,6-dihydroxycyclohexa-2,4-diene-1-carboxylate dehydrogenase
1.3.1.26 dihydrodipicolinate reductase
1.3.1.27 2-hexadecenal reductase
1.3.1.28 2,3-dihydro-2,3-dihydroxybenzoate dehydrogenase
1.3.1.29
cis
-1,2-dihydro-1,2-dihydroxynaphthalene dehydrogenase
1.3.1.30 progesterone 5α-reductase
1.3.1.31 2-enoate reductase
1.3.1.32 maleylacetate reductase
1.3.1.33 protochlorophyllide reductase
1.3.1.34 2,4-dienoyl-CoA reductase [(2
E
)-enoyl-CoA-producing]
1.3.1.35 phosphatidylcholine desaturase
1.3.1.36 geissoschizine dehydrogenase
1.3.1.37
cis
-2-enoyl-CoA reductase (NADPH)
1.3.1.38
trans
-2-enoyl-CoA reductase (NADPH)
1.3.1.39 enoyl-[acyl-carrier-protein] reductase (NADPH,
Re
-specific)
1.3.1.40 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate reductase
1.3.1.41 xanthommatin reductase
1.3.1.42 12-oxophytodienoate reductase
1.3.1.43 arogenate dehydrogenase
1.3.1.44
trans
-2-enoyl-CoA reductase (NAD
+
)
1.3.1.45 2′-hydroxyisoflavone reductase
1.3.1.46 biochanin-A reductase
1.3.1.47 α-santonin 1,2-reductase
1.3.1.48 13,14-dehydro-15-oxoprostaglandin 13-reductase
1.3.1.49
cis
-3,4-dihydrophenanthrene-3,4-diol dehydrogenase
1.3.1.50 created 1992, deleted 1999
1.3.1.51 2′-hydroxydaidzein reductase
1.3.1.52 2-methyl-branched-chain-enoyl-CoA reductase
1.3.1.53 (3
S
,4
R
)-3,4-dihydroxycyclohexa-1,5-diene-1,4-dicarboxylate dehydrogenase
1.3.1.54 precorrin-6A reductase
1.3.1.55 created 1999, deleted 2004
1.3.1.56
cis
-2,3-dihydrobiphenyl-2,3-diol dehydrogenase
1.3.1.57 phloroglucinol reductase
1.3.1.58 2,3-dihydroxy-2,3-dihydro-
p
-cumate dehydrogenase
1.3.1.59 1,2-dihydroxy-3-methyl-1,2-dihydrobenzoate dehydrogenase
1.3.1.60 dibenzothiophene dihydrodiol dehydrogenase
1.3.1.61 terephthalate 1,2-
cis
-dihydrodiol dehydrogenase
1.3.1.62 pimeloyl-CoA dehydrogenase
1.3.1.63 2,4-dichlorobenzoyl-CoA reductase
1.3.1.64 phthalate 4,5-
cis
-dihydrodiol dehydrogenase
1.3.1.65 5,6-dihydroxy-3-methyl-2-oxo-1,2,5,6-tetrahydroquinoline dehydrogenase
1.3.1.66
cis
-dihydroethylcatechol dehydrogenase
1.3.1.67
cis
-1,2-dihydroxy-4-methylcyclohexa-3,5-diene-1-carboxylate dehydrogenase
1.3.1.68 1,2-dihydroxy-6-methylcyclohexa-3,5-dienecarboxylate dehydrogenase
1.3.1.69 zeatin reductase
1.3.1.70 Δ
14
-sterol reductase
1.3.1.71 Δ
24(24
1
)
-sterol reductase
1.3.1.72 Δ
24
-sterol reductase
1.3.1.73 1,2-dihydrovomilenine reductase
1.3.1.74 2-alkenal reductase [NAD(P)
+
]
1.3.1.75 3,8-divinyl protochlorophyllide
a
8-vinyl-reductase (NADPH)
1.3.1.76 precorrin-2 dehydrogenase
1.3.1.77 anthocyanidin reductase [(2
R
,3
R
)-flavan-3-ol-forming]
1.3.1.78 arogenate dehydrogenase (NADP
+
)
1.3.1.79 arogenate dehydrogenase [NAD(P)
+
]
1.3.1.80 red chlorophyll catabolite reductase
1.3.1.81 (+)-pulegone reductase
1.3.1.82 (-)-isopiperitenone reductase
1.3.1.83 geranylgeranyl diphosphate reductase
1.3.1.84 acrylyl-CoA reductase (NADPH)
1.3.1.85 crotonyl-CoA carboxylase/reductase
1.3.1.86 crotonyl-CoA reductase
1.3.1.87 3-(
cis
-5,6-dihydroxycyclohexa-1,3-dien-1-yl)propanoate dehydrogenase
1.3.1.88 tRNA-dihydrouridine
16/17
synthase [NAD(P)
+
]
1.3.1.89 tRNA-dihydrouridine
47
synthase [NAD(P)
+
]
1.3.1.90 tRNA-dihydrouridine
20a/20b
synthase [NAD(P)
+
]
1.3.1.91 tRNA-dihydrouridine
20
synthase [NAD(P)
+
]
1.3.1.92 artemisinic aldehyde Δ
11(13)
-reductase
1.3.1.93 very-long-chain enoyl-CoA reductase
1.3.1.94 polyprenol reductase
1.3.1.95 acrylyl-CoA reductase (NADH)
1.3.1.96
Botryococcus
squalene synthase
1.3.1.97 botryococcene synthase
1.3.1.98 UDP-
N
-acetylmuramate dehydrogenase
1.3.1.99 (
S
)-8-oxocitronellyl enol synthase
1.3.1.100 chanoclavine-I aldehyde reductase
1.3.1.101 2,3-bis-
O
-geranylgeranyl-
sn
-glycerol 1-phosphate reductase [NAD(P)H]
1.3.1.102 2-alkenal reductase (NADP
+
)
1.3.1.103 2-haloacrylate reductase
1.3.1.104 enoyl-[acyl-carrier-protein] reductase (NADPH)
1.3.1.105 2-methylene-furan-3-one reductase
1.3.1.106 cobalt-precorrin-6A reductase
1.3.1.107 sanguinarine reductase
1.3.1.108 caffeoyl-CoA reductase
1.3.1.109 butanoyl-CoA dehydrogenase complex (NAD
+
, ferredoxin)
1.3.1.110 lactate dehydrogenase (NAD
+
,ferredoxin)
1.3.1.111 geranylgeranyl-bacteriochlorophyllide
a
reductase
1.3.1.112 anthocyanidin reductase [(2
S
)-flavan-3-ol-forming]
1.3.1.113 (4-alkanoyl-5-oxo-2,5-dihydrofuran-3-yl)methyl phosphate reductase
1.3.1.114 3-dehydro-bile acid Δ
4,6
-reductase
1.3.1.115 3-oxocholoyl-CoA 4-desaturase
1.3.1.116 7β-hydroxy-3-oxochol-24-oyl-CoA 4-desaturase
1.3.1.117 hydroxycinnamoyl-CoA reductase
1.3.1.118 meromycolic acid enoyl-[acyl-carrier-protein] reductase
1.3.1.119 chlorobenzene dihydrodiol dehydrogenase
1.3.1.120 cyclohexane-1-carbonyl-CoA reductase (NADP
+
)
1.3.1.121 4-amino-4-deoxyprephenate dehydrogenase
1.3.1.122 (
S
)-8-oxocitronellyl enol synthase
1.3.1.123 8-oxogeranial reductase
1.3.1.124 2,4-dienoyl-CoA reductase [(3
E
)-enoyl-CoA-producing]
1.3.2 With a cytochrome as acceptor
1.3.3 With oxygen as acceptor
1.3.4 With a disulfide as acceptor
1.3.5 With a quinone or related compound as acceptor
1.3.7 With an iron-sulfur protein as acceptor
1.3.8 With a flavin as acceptor
1.3.98 With other, known, physiological acceptors
1.3.99 With unknown physiological acceptors
1.4 Acting on the CH-NH
2
group of donors
1.5 Acting on the CH-NH group of donors
1.6 Acting on NADH or NADPH
1.7 Acting on other nitrogenous compounds as donors
1.8 Acting on a sulfur group of donors
1.9 Acting on a heme group of donors
1.10 Acting on diphenols and related substances as donors
1.11 Acting on a peroxide as acceptor
1.12 Acting on hydrogen as donor
1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)
1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
1.15 Acting on superoxide as acceptor
1.15.1 Acting on superoxide as acceptor (only sub-subclass identified to date)
1.16 Oxidizing metal ions
1.17 Acting on CH or CH
2
groups
1.18 Acting on iron-sulfur proteins as donors
1.18.1 With NAD
+
or NADP
+
as acceptor
1.18.2 With dinitrogen as acceptor (deleted sub-subclass)
1.18.3 With H
+
as acceptor (deleted sub-subclass)
1.18.6 With dinitrogen as acceptor
1.18.96 With other, known, acceptors (deleted sub-subclass)
1.18.99 With H
+
as acceptor (deleted sub-subclass)
1.19 Acting on reduced flavodoxin as donor
1.20 Acting on phosphorus or arsenic in donors
1.21 Catalysing the reaction X-H + Y-H = X-Y
1.21.1 With NAD
+
or NADP
+
as acceptor
1.21.3 With oxygen as acceptor
1.21.4 With a disulfide as acceptor
1.21.98 With other, known, physiological acceptors
1.21.99 With unknown physiological acceptors
1.22 Acting on halogen in donors
1.23 Reducing C-O-C group as acceptor
1.97 Other oxidoreductases
1.97.1 Sole sub-subclass for oxidoreductases that do not belong in the other subclasses
1.98 Enzymes using H
2
as reductant (deleted subclass)
1.99 Other enzymes using O
2
as oxidant (deleted subclass)
2 Transferases
2.1 Transferring one-carbon groups
2.2 Transferring aldehyde or ketonic groups
2.3 Acyltransferases
2.4 Glycosyltransferases
2.5 Transferring alkyl or aryl groups, other than methyl groups
2.6 Transferring nitrogenous groups
2.7 Transferring phosphorus-containing groups
2.8 Transferring sulfur-containing groups
2.9 Transferring selenium-containing groups
2.10 Transferring molybdenum- or tungsten-containing groups
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
3.7 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