Enzymes A-Z
Complete database of 6965 enzymes with EC numbers, catalytic activities, alternative names, and UniProt cross-references. Browse by EC class or search for specific enzymes.
Enzymes A-Z
Complete database of 6965 enzymes with EC numbers, catalytic activities, alternative names, and UniProt cross-references. Browse by EC class or search for specific enzymes.
hydroxysqualene dehydroxylase (EC 1.17.8.1)
hydroxysqualene dehydroxylase. EC 1.17.8.1.. squalene + FAD + H2O + H(+) = hydroxysqualene + FADH2.
hydroxysqualene synthase (EC 4.2.3.156)
hydroxysqualene synthase. EC 4.2.3.156.. presqualene diphosphate + H2O = hydroxysqualene + diphosphate.
hydroxystrychnine O-methyltransferase (EC 2.1.1.397)
hydroxystrychnine O-methyltransferase. EC 2.1.1.397.. 10-hydroxystrychnine + S-adenosyl-L-methionine = beta-colubrine +
hygromycin B 4-O-kinase (EC 2.7.1.163)
hygromycin B 4-O-kinase. EC 2.7.1.163.. hygromycin B + ATP = 4-O-phosphohygromycin B + ADP + H(+).
hygromycin-B 7''-O-kinase (EC 2.7.1.119)
hygromycin-B 7''-O-kinase. EC 2.7.1.119.. hygromycin B + ATP = 7''-O-phosphohygromycin B + ADP + H(+).
hyoscyamine (6S)-dioxygenase (EC 1.14.11.11)
hyoscyamine (6S)-dioxygenase. EC 1.14.11.11.. L-hyoscyamine + 2-oxoglutarate + O2 = (6S)-6-hydroxyhyoscyamine +
hypodermin C (EC 3.4.21.49)
hypodermin C. EC 3.4.21.49.. Hydrolysis of proteins including native collagen at Xaa-|-Ala bond
hyponitrite reductase (EC 1.7.1.5)
hyponitrite reductase. EC 1.7.1.5.. 2 hydroxylamine + 2 NAD(+) = hyponitrous acid + 2 NADH + 2 H(+).
hypotaurocyamine kinase (EC 2.7.3.6)
hypotaurocyamine kinase. EC 2.7.3.6.. hypotaurocyamine + ATP = N(omega)-phosphohypotaurocyamine + ADP + H(+).
hypoxanthine phosphoribosyltransferase (EC 2.4.2.8)
hypoxanthine phosphoribosyltransferase. EC 2.4.2.8.. IMP + diphosphate = hypoxanthine + 5-phospho-alpha-D-ribose
hypoxia-inducible factor-asparagine dioxygenase (EC 1.14.11.30)
hypoxia-inducible factor-asparagine dioxygenase. EC 1.14.11.30.. L-asparaginyl-[hypoxia-inducible factor alpha subunit] + 2-oxoglutarate +
hypoxia-inducible factor-proline dioxygenase (EC 1.14.11.29)
hypoxia-inducible factor-proline dioxygenase. EC 1.14.11.29.. L-prolyl-[hypoxia-inducible factor alpha subunit] + 2-oxoglutarate + O2 =
icosanoyl-CoA 5-desaturase (EC 1.14.19.10)
icosanoyl-CoA 5-desaturase. EC 1.14.19.10.. eicosanoyl-CoA + 2 Fe(II)-[cytochrome b5] + O2 + 2 H(+) = (5Z)-
iduronate-2-sulfatase (EC 3.1.6.13)
iduronate-2-sulfatase. EC 3.1.6.13.. Hydrolysis of the 2-sulfate groups of the L-iduronate 2-sulfate units of
IgA-specific metalloendopeptidase (EC 3.4.24.13)
IgA-specific metalloendopeptidase. EC 3.4.24.13.. Cleavage of Pro-|-Thr bond in the hinge region of the heavy chain of
IgA-specific serine endopeptidase (EC 3.4.21.72)
IgA-specific serine endopeptidase. EC 3.4.21.72.. Cleavage of immunoglobulin A molecules at certain Pro-|-Xaa bonds in the
IkappaB kinase (EC 2.7.11.10)
IkappaB kinase. EC 2.7.11.10.. L-seryl-[I-kappa-B protein] + ATP = O-phospho-L-seryl-[I-kappa-B protein]
imidazole glycerol-phosphate synthase (EC 4.3.2.10)
imidazole glycerol-phosphate synthase. EC 4.3.2.10.. 5-[(5-phospho-1-deoxy-D-ribulos-1-ylimino)methylamino]-1-(5-phospho-beta-
imidazole N-acetyltransferase (EC 2.3.1.2)
imidazole N-acetyltransferase. EC 2.3.1.2.. 1H-imidazole + acetyl-CoA = N-acetylimidazole + CoA.
imidazoleacetate 4-monooxygenase (EC 1.14.13.5)
imidazoleacetate 4-monooxygenase. EC 1.14.13.5.. imidazole-4-acetate + NADH + O2 + H(+) = 5-hydroxyimidazole-4-acetate +
imidazoleacetate--phosphoribosyldiphosphate ligase (EC 6.3.4.8)
imidazoleacetate--phosphoribosyldiphosphate ligase. EC 6.3.4.8.. imidazole-4-acetate + 5-phospho-alpha-D-ribose 1-diphosphate + ATP +
imidazoleglycerol-phosphate dehydratase (EC 4.2.1.19)
imidazoleglycerol-phosphate dehydratase. EC 4.2.1.19.. D-erythro-1-(imidazol-4-yl)glycerol 3-phosphate = 3-(imidazol-4-yl)-2-
imidazolonepropionase (EC 3.5.2.7)
imidazolonepropionase. EC 3.5.2.7.. 4-imidazolone-5-propanoate + H2O = N-formimidoyl-L-glutamate.
iminosuccinate reductase (EC 1.4.1.29)
iminosuccinate reductase. EC 1.4.1.29.. L-aspartate + NAD(+) = iminosuccinate + NADH + H(+).
IMP cyclohydrolase (EC 3.5.4.10)
IMP cyclohydrolase. EC 3.5.4.10.. IMP + H2O = 5-formamido-1-(5-phospho-D-ribosyl)imidazole-4-carboxamide.
IMP dehydrogenase (EC 1.1.1.205)
IMP dehydrogenase. EC 1.1.1.205.. IMP + NAD(+) + H2O = XMP + NADH + H(+).
IMP-specific 5'-nucleotidase (EC 3.1.3.99)
IMP-specific 5'-nucleotidase. EC 3.1.3.99.. IMP + H2O = inosine + phosphate.
indanol dehydrogenase (EC 1.1.1.112)
indanol dehydrogenase. EC 1.1.1.112.. (1) (S)-indan-1-ol + NAD(+) = indan-1-one + NADH + H(+).
indigoidine synthase (EC 4.3.3.9)
indigoidine synthase. EC 4.3.3.9.. 2 FMN + 2 L-glutamine + 2 ATP + O2 = indigoidine + 2 FMNH2 + 2 AMP +
indole 2,3-dioxygenase (EC 1.13.11.17)
indole 2,3-dioxygenase. EC 1.13.11.17.. indole + O2 = 2-formamidobenzaldehyde.
indole-2-monooxygenase (EC 1.14.14.153)
indole-2-monooxygenase. EC 1.14.14.153.. indole + reduced [NADPH--hemoprotein reductase] + O2 = indolin-2-one +
indole-3-acetaldehyde oxidase (EC 1.2.3.7)
indole-3-acetaldehyde oxidase. EC 1.2.3.7.. indole-3-acetaldehyde + O2 + H2O = (indol-3-yl)acetate + H2O2 + H(+).
indole-3-acetaldehyde reductase (NADH) (EC 1.1.1.190)
indole-3-acetaldehyde reductase (NADH). EC 1.1.1.190.. indole-3-ethanol + NAD(+) = indole-3-acetaldehyde + NADH + H(+).
indole-3-acetaldehyde reductase (NADPH) (EC 1.1.1.191)
indole-3-acetaldehyde reductase (NADPH). EC 1.1.1.191.. indole-3-ethanol + NADP(+) = indole-3-acetaldehyde + NADPH + H(+).
indole-3-acetate beta-glucosyltransferase (EC 2.4.1.121)
indole-3-acetate beta-glucosyltransferase. EC 2.4.1.121.. (indol-3-yl)acetate + UDP-alpha-D-glucose = 1-O-(indol-3-ylacetyl)-beta-
indole-3-acetate monooxygenase (EC 1.14.13.235)
indole-3-acetate monooxygenase. EC 1.14.13.235.. (indol-3-yl)acetate + NADH + O2 + H(+) = 2-hydroxy-(1H-indol-3-yl)acetate
indole-3-acetate O-methyltransferase (EC 2.1.1.278)
indole-3-acetate O-methyltransferase. EC 2.1.1.278.. (indol-3-yl)acetate + S-adenosyl-L-methionine = methyl (indol-3-
indole-3-carbonyl nitrile 4-hydroxylase (EC 1.14.14.165)
indole-3-carbonyl nitrile 4-hydroxylase. EC 1.14.14.165.. indole-3-carbonyl nitrile + reduced [NADPH--hemoprotein reductase] + O2 =
indole-3-carboxylate decarboxylase (EC 4.1.1.92)
indole-3-carboxylate decarboxylase. EC 4.1.1.92.. indole-3-carboxylate + H(+) = indole + CO2.
indole-3-glycerol-phosphate lyase (EC 4.1.2.8)
indole-3-glycerol-phosphate lyase. EC 4.1.2.8.. (1S,2R)-1-C-(indol-3-yl)glycerol 3-phosphate = indole + D-glyceraldehyde
indole-3-glycerol-phosphate synthase (EC 4.1.1.48)
indole-3-glycerol-phosphate synthase. EC 4.1.1.48.. 1-(2-carboxyphenylamino)-1-deoxy-D-ribulose 5-phosphate + H(+) = (1S,2R)-
indole-3-pyruvate monooxygenase (EC 1.14.13.168)
indole-3-pyruvate monooxygenase. EC 1.14.13.168.. indole-3-pyruvate + NADPH + O2 + H(+) = (indol-3-yl)acetate + CO2 +
indoleacetaldoxime dehydratase (EC 4.8.1.3)
indoleacetaldoxime dehydratase. EC 4.8.1.3.. (E)-(indol-3-yl)acetaldehyde oxime = (indol-3-yl)acetonitrile + H2O.
indoleacetate decarboxylase (EC 4.1.1.115)
indoleacetate decarboxylase. EC 4.1.1.115.. (indol-3-yl)acetate + H(+) = skatole + CO2.
indoleacetate--CoA ligase (EC 6.2.1.75)
indoleacetate--CoA ligase. EC 6.2.1.75.. (indol-3-yl)acetate + ATP + CoA = (indol-3-yl)acetyl-CoA + AMP +
indoleacetate--lysine synthetase (EC 6.3.2.20)
indoleacetate--lysine synthetase. EC 6.3.2.20.. (indol-3-yl)acetate + L-lysine + ATP = N(6)-[(indole-3-yl)acetyl]-L-
indoleacetylglucose--inositol O-acyltransferase (EC 2.3.1.72)
indoleacetylglucose--inositol O-acyltransferase. EC 2.3.1.72.. 1-O-(indol-3-ylacetyl)-beta-D-glucose + myo-inositol = indole-3-acetyl-
indoleamine 2,3-dioxygenase (EC 1.13.11.52)
indoleamine 2,3-dioxygenase. EC 1.13.11.52.. (1) D-tryptophan + O2 = N-formyl-D-kynurenine.
indolepyruvate C-methyltransferase (EC 2.1.1.47)
indolepyruvate C-methyltransferase. EC 2.1.1.47.. indole-3-pyruvate + S-adenosyl-L-methionine = (R)-3-(indol-3-yl)-2-
indolepyruvate decarboxylase (EC 4.1.1.74)
indolepyruvate decarboxylase. EC 4.1.1.74.. indole-3-pyruvate + H(+) = indole-3-acetaldehyde + CO2.
indolepyruvate ferredoxin oxidoreductase (EC 1.2.7.8)
indolepyruvate ferredoxin oxidoreductase. EC 1.2.7.8.. indole-3-pyruvate + 2 oxidized [2Fe-2S]-[ferredoxin] + CoA = (indol-3-
indolin-2-one monooxygenase (EC 1.14.14.157)
indolin-2-one monooxygenase. EC 1.14.14.157.. indolin-2-one + reduced [NADPH--hemoprotein reductase] + O2 =
indolylacetyl-myo-inositol galactosyltransferase (EC 2.4.1.156)
indolylacetyl-myo-inositol galactosyltransferase. EC 2.4.1.156.. indole-3-acetyl-1D-myo-inositol + UDP-alpha-D-galactose = 5-O-(indol-3-
indolylacetylinositol arabinosyltransferase (EC 2.4.2.34)
indolylacetylinositol arabinosyltransferase. EC 2.4.2.34.. indole-3-acetyl-1D-myo-inositol + UDP-beta-L-arabinopyranose = (indol-3-
indoxyl-UDPG glucosyltransferase (EC 2.4.1.220)
indoxyl-UDPG glucosyltransferase. EC 2.4.1.220.. indoxyl + UDP-alpha-D-glucose = indican + UDP + H(+).
infectious pancreatic necrosis birnavirus Vp4 peptidase (EC 3.4.21.115)
infectious pancreatic necrosis birnavirus Vp4 peptidase. EC 3.4.21.115.. Cleaves the (Ser/Thr)-Xaa-Ala-|-(Ser/Ala)-Gly motif in the polyprotein
initiation-specific alpha-1,6-mannosyltransferase (EC 2.4.1.232)
initiation-specific alpha-1,6-mannosyltransferase. EC 2.4.1.232.. Transfers an alpha-D-mannosyl residue from GDP-mannose into lipid-linked
inorganic diphosphatase (EC 3.6.1.1)
inorganic diphosphatase. EC 3.6.1.1.. diphosphate + H2O = 2 phosphate + H(+).
inosinate nucleosidase (EC 3.2.2.12)
inosinate nucleosidase. EC 3.2.2.12.. IMP + H2O = hypoxanthine + D-ribose 5-phosphate.
inosine diphosphate phosphatase (EC 3.6.1.64)
inosine diphosphate phosphatase. EC 3.6.1.64.. (1) IDP + H2O = IMP + phosphate + H(+).