Biochemistry & Enzymes

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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.

hyaluronoglucuronidase (EC 3.2.1.36)

hyaluronoglucuronidase. EC 3.2.1.36.. Random hydrolysis of (1->3)-linkages between beta-D-glucuronate and

HycI peptidase (EC 3.4.23.51)

HycI peptidase. EC 3.4.23.51.. This enzyme specifically removes a 32-amino acid peptide from the

hydantoin racemase (EC 5.1.99.5)

hydantoin racemase. EC 5.1.99.5.. a D-5-monosubstituted hydantoin = a L-5-monosubstituted hydantoin.

hydrazine dehydrogenase (EC 1.7.2.8)

hydrazine dehydrogenase. EC 1.7.2.8.. hydrazine + 4 Fe(III)-[cytochrome c] = N2 + 4 Fe(II)-[cytochrome c] +

hydrazine synthase (EC 1.7.2.7)

hydrazine synthase. EC 1.7.2.7.. hydrazine + 3 Fe(III)-[cytochrome c] + H2O = nitric oxide + 3 Fe(II)-

hydrogen dehydrogenase (EC 1.12.1.2)

hydrogen dehydrogenase. EC 1.12.1.2.. H2 + NAD(+) = NADH + H(+).

hydrogen dehydrogenase (NADP(+)) (EC 1.12.1.3)

hydrogen dehydrogenase (NADP(+)). EC 1.12.1.3.. H2 + NADP(+) = NADPH + H(+).

hydrogen dehydrogenase [NAD(P)(+)] (EC 1.12.1.5)

hydrogen dehydrogenase [NAD(P)(+)]. EC 1.12.1.5.. (1) H2 + NADP(+) = NADPH + H(+).

hydrogen peroxide-dependent heme synthase (EC 1.3.98.5)

hydrogen peroxide-dependent heme synthase. EC 1.3.98.5.. Fe-coproporphyrin III + 2 H2O2 + 2 H(+) = heme b + 2 CO2 + 4 H2O.

hydrogen-dependent carbon dioxide reductase (EC 1.17.98.5)

hydrogen-dependent carbon dioxide reductase. EC 1.17.98.5.. formate + H(+) = H2 + CO2.

hydrogen-sulfide S-acetyltransferase (EC 2.3.1.10)

hydrogen-sulfide S-acetyltransferase. EC 2.3.1.10.. hydrogen sulfide + acetyl-CoA = thioacetate + CoA.

hydrogen:quinone oxidoreductase (EC 1.12.5.1)

hydrogen:quinone oxidoreductase. EC 1.12.5.1.. H2 + a menaquinone = a menaquinol.

hydrogenase (acceptor) (EC 1.12.99.6)

hydrogenase (acceptor). EC 1.12.99.6.. H2 + A = AH2.

hydrogenase (NAD(+), ferredoxin) (EC 1.12.1.4)

hydrogenase (NAD(+), ferredoxin). EC 1.12.1.4.. 2 H2 + 2 oxidized [2Fe-2S]-[ferredoxin] + NAD(+) = 2 reduced [2Fe-2S]-

hydrogenobyrinic acid a,c-diamide synthase (glutamine-hydrolyzing) (EC 6.3.5.9)

hydrogenobyrinic acid a,c-diamide synthase (glutamine-hydrolyzing). EC 6.3.5.9.. hydrogenobyrinate + 2 L-glutamine + 2 ATP + 2 H2O = hydrogenobyrinate

hydroperoxide dehydratase (EC 4.2.1.92)

hydroperoxide dehydratase. EC 4.2.1.92.. (13S)-hydroperoxy-(9Z,11E,15Z)-octadecatrienoate = (9Z,13S,15Z)-12,13-

hydroperoxy fatty acid reductase (EC 1.11.1.22)

hydroperoxy fatty acid reductase. EC 1.11.1.22.. a hydroperoxy polyunsaturated fatty acid + NADPH + H(+) = a hydroxy

hydroperoxy icosatetraenoate dehydratase (EC 4.2.1.152)

hydroperoxy icosatetraenoate dehydratase. EC 4.2.1.152.. a hydroperoxyeicosatetraenoate = an oxoeicosatetraenoate + H2O.

hydroperoxy icosatetraenoate isomerase (EC 5.4.4.7)

hydroperoxy icosatetraenoate isomerase. EC 5.4.4.7.. a hydroperoxyeicosatetraenoate = a hydroxy-epoxy-eicosatetraenoate.

hydropyrene synthase (EC 4.2.3.201)

hydropyrene synthase. EC 4.2.3.201.. (2E,6E,10E)-geranylgeranyl diphosphate = hydropyrene + diphosphate.

hydropyrenol synthase (EC 4.2.3.202)

hydropyrenol synthase. EC 4.2.3.202.. (2E,6E,10E)-geranylgeranyl diphosphate + H2O = hydropyrenol +

hydroquinone 1,2-dioxygenase (EC 1.13.11.66)

hydroquinone 1,2-dioxygenase. EC 1.13.11.66.. hydroquinone + O2 = (2E,4Z)-4-hydroxy-6-oxohexa-2,4-dienoate + H(+).

hydroquinone glucosyltransferase (EC 2.4.1.218)

hydroquinone glucosyltransferase. EC 2.4.1.218.. hydroquinone + UDP-alpha-D-glucose = hydroquinone O-beta-D-

hydroxyacid-oxoacid transhydrogenase (EC 1.1.99.24)

hydroxyacid-oxoacid transhydrogenase. EC 1.1.99.24.. (1) (S)-3-hydroxybutanoate + 2-oxoglutarate = (R)-2-hydroxyglutarate +

hydroxyacylglutathione hydrolase (EC 3.1.2.6)

hydroxyacylglutathione hydrolase. EC 3.1.2.6.. an S-(2-hydroxyacyl)glutathione + H2O = a 2-hydroxy carboxylate +

hydroxyanthraquinone glucosyltransferase (EC 2.4.1.181)

hydroxyanthraquinone glucosyltransferase. EC 2.4.1.181.. UDP-glucose + an hydroxyanthraquinone = UDP + a glucosyloxyanthraquinone.

hydroxybutyrate-dimer hydrolase (EC 3.1.1.22)

hydroxybutyrate-dimer hydrolase. EC 3.1.1.22.. (3R)-hydroxybutanoate dimer + H2O = 2 (R)-3-hydroxybutanoate + H(+).

hydroxycinnamate 4-beta-glucosyltransferase (EC 2.4.1.126)

hydroxycinnamate 4-beta-glucosyltransferase. EC 2.4.1.126.. (E)-4-coumarate + UDP-alpha-D-glucose = 4-O-(beta-D-glucosyl)-trans-4-

hydroxycinnamoyl-CoA reductase (EC 1.3.1.117)

hydroxycinnamoyl-CoA reductase. EC 1.3.1.117.. (1) dihydro-4-coumaroyl-CoA + NADP(+) = (E)-4-coumaroyl-CoA + NADPH +

hydroxycinnamoyl-CoA:5-hydroxyanthranilate N-hydroxycinnamoyltransferase (EC 2.3.1.302)

hydroxycinnamoyl-CoA:5-hydroxyanthranilate N-hydroxycinnamoyltransferase. EC 2.3.1.302.. (1) 5-hydroxyanthranilate + (E)-4-coumaroyl-CoA = avenanthramide A + CoA.

hydroxycyclohexanecarboxylate dehydrogenase (EC 1.1.1.166)

hydroxycyclohexanecarboxylate dehydrogenase. EC 1.1.1.166.. (1S,3R,4S)-3,4-dihydroxycyclohexane-1-carboxylate + NAD(+) = (1S,4S)-4-

hydroxydechloroatrazine ethylaminohydrolase (EC 3.5.4.43)

hydroxydechloroatrazine ethylaminohydrolase. EC 3.5.4.43.. hydroxyatrazine + H2O + H(+) = N-isopropylammelide + ethylamine.

hydroxyethylthiazole kinase (EC 2.7.1.50)

hydroxyethylthiazole kinase. EC 2.7.1.50.. 5-(2-hydroxyethyl)-4-methylthiazole + ATP = 4-methyl-5-

hydroxyglutamate decarboxylase (EC 4.1.1.16)

hydroxyglutamate decarboxylase. EC 4.1.1.16.. 3-hydroxy-L-glutamate + H(+) = 4-amino-3-hydroxybutanoate + CO2.

hydroxyisourate hydrolase (EC 3.5.2.17)

hydroxyisourate hydrolase. EC 3.5.2.17.. 5-hydroxyisourate + H2O = 5-hydroxy-2-oxo-4-ureido-2,5-dihydro-

hydroxyjasmonate sulfotransferase (EC 2.8.2.39)

hydroxyjasmonate sulfotransferase. EC 2.8.2.39.. a 12-hydroxyjasmonate + 3'-phosphoadenylyl sulfate = a 12-sulfojasmonate

hydroxylamine dehydrogenase (EC 1.7.2.6)

hydroxylamine dehydrogenase. EC 1.7.2.6.. hydroxylamine + 4 Fe(III)-[cytochrome c] + H2O = 4 Fe(II)-[cytochrome c]

hydroxylamine oxidase (cytochrome) (EC 1.7.3.6)

hydroxylamine oxidase (cytochrome). EC 1.7.3.6.. hydroxylamine + O2 = nitrite + H2O + H(+).

hydroxylamine oxidase (EC 1.7.2.9)

hydroxylamine oxidase. EC 1.7.2.9.. hydroxylamine + 3 Fe(III)-[cytochrome c] = nitric oxide + 3 Fe(II)-

hydroxylamine reductase (EC 1.7.99.1)

hydroxylamine reductase. EC 1.7.99.1.. A + NH4(+) + H2O = hydroxylamine + AH2 + H(+).

hydroxylamine reductase (NADH) (EC 1.7.1.10)

hydroxylamine reductase (NADH). EC 1.7.1.10.. NH4(+) + NAD(+) + H2O = hydroxylamine + NADH + 2 H(+).

hydroxylysine kinase (EC 2.7.1.81)

hydroxylysine kinase. EC 2.7.1.81.. (5R)-5-hydroxy-L-lysine + GTP = (5R)-5-phosphooxy-L-lysine + GDP + H(+).

hydroxymalonate dehydrogenase (EC 1.1.1.167)

hydroxymalonate dehydrogenase. EC 1.1.1.167.. hydroxymalonate + NAD(+) = oxomalonate + NADH + H(+).

hydroxymandelonitrile glucosyltransferase (EC 2.4.1.178)

hydroxymandelonitrile glucosyltransferase. EC 2.4.1.178.. 4-hydroxymandelonitrile + UDP-alpha-D-glucose = taxiphyllin + UDP + H(+).

hydroxymandelonitrile lyase (EC 4.1.2.11)

hydroxymandelonitrile lyase. EC 4.1.2.11.. (S)-4-hydroxymandelonitrile = 4-hydroxybenzaldehyde + hydrogen cyanide.

hydroxymethylbilane synthase (EC 2.5.1.61)

hydroxymethylbilane synthase. EC 2.5.1.61.. 4 porphobilinogen + H2O = hydroxymethylbilane + 4 NH4(+).

hydroxymethylglutaryl-CoA hydrolase (EC 3.1.2.5)

hydroxymethylglutaryl-CoA hydrolase. EC 3.1.2.5.. (3S)-3-hydroxy-3-methylglutaryl-CoA + H2O = 3-hydroxy-3-methylglutarate +

hydroxymethylglutaryl-CoA lyase (EC 4.1.3.4)

hydroxymethylglutaryl-CoA lyase. EC 4.1.3.4.. (3S)-3-hydroxy-3-methylglutaryl-CoA = acetoacetate + acetyl-CoA.

hydroxymethylglutaryl-CoA reductase (EC 1.1.1.88)

hydroxymethylglutaryl-CoA reductase. EC 1.1.1.88.. (R)-mevalonate + 2 NAD(+) + CoA = (3S)-3-hydroxy-3-methylglutaryl-CoA +

hydroxymethylglutaryl-CoA reductase (NADPH) (EC 1.1.1.34)

hydroxymethylglutaryl-CoA reductase (NADPH). EC 1.1.1.34.. (R)-mevalonate + 2 NADP(+) + CoA = (3S)-3-hydroxy-3-methylglutaryl-CoA +

hydroxymethylglutaryl-CoA synthase (EC 2.3.3.10)

hydroxymethylglutaryl-CoA synthase. EC 2.3.3.10.. acetoacetyl-CoA + acetyl-CoA + H2O = (3S)-3-hydroxy-3-methylglutaryl-CoA

hydroxymethylpyrimidine kinase (EC 2.7.1.49)

hydroxymethylpyrimidine kinase. EC 2.7.1.49.. 4-amino-5-hydroxymethyl-2-methylpyrimidine + ATP = 4-amino-2-methyl-5-

hydroxyphenylpyruvate reductase (EC 1.1.1.237)

hydroxyphenylpyruvate reductase. EC 1.1.1.237.. (1) (2R)-2-hydroxy-3-(4-hydroxyphenyl)propanoate + NADP(+) =

hydroxyphytanate oxidase (EC 1.1.3.27)

hydroxyphytanate oxidase. EC 1.1.3.27.. (2S)-2-hydroxyphytanate + O2 = 2-oxophytanate + H2O2.

hydroxyproline dehydrogenase (EC 1.5.5.3)

hydroxyproline dehydrogenase. EC 1.5.5.3.. trans-4-hydroxy-L-proline + a quinone = (3R,5S)-1-pyrroline-3-hydroxy-5-

hydroxyproline O-arabinosyltransferase (EC 2.4.2.58)

hydroxyproline O-arabinosyltransferase. EC 2.4.2.58.. trans-4-hydroxy-L-prolyl-[protein] + UDP-beta-L-arabinofuranose =

hydroxypyruvate decarboxylase (EC 4.1.1.40)

hydroxypyruvate decarboxylase. EC 4.1.1.40.. 3-hydroxypyruvate + H(+) = glycolaldehyde + CO2.

hydroxypyruvate isomerase (EC 5.3.1.22)

hydroxypyruvate isomerase. EC 5.3.1.22.. 3-hydroxypyruvate = 2-hydroxy-3-oxopropanoate.

hydroxypyruvate reductase (EC 1.1.1.81)

hydroxypyruvate reductase. EC 1.1.1.81.. (1) (R)-glycerate + NAD(+) = 3-hydroxypyruvate + NADH + H(+).

hydroxyquinol 1,2-dioxygenase (EC 1.13.11.37)

hydroxyquinol 1,2-dioxygenase. EC 1.13.11.37.. benzene-1,2,4-triol + O2 = maleylacetate + 2 H(+).