List of EC numbers (EC 5)

This list contains a list of EC numbers for the fifth group, EC 5, isomerases, placed in numerical order as determined by the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology.

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EC 5.1: Epimerases and racemases

EC 5.1.1: Acting on Amino acids and Derivatives

• EC 5.1.1.1: alanine racemase
• EC 5.1.1.2: methionine racemase
• EC 5.1.1.3: glutamate racemase
• EC 5.1.1.4: proline racemase
• EC 5.1.1.5: lysine racemase
• EC 5.1.1.6: threonine racemase
• EC 5.1.1.7: diaminopimelate epimerase
• EC 5.1.1.8: 4-hydroxyproline epimerase
• EC 5.1.1.9: arginine racemase
• EC 5.1.1.10: amino-acid racemase
• EC 5.1.1.11: phenylalanine racemase (ATP-hydrolysing)
• EC 5.1.1.12: ornithine racemase
• EC 5.1.1.13: aspartate racemase
• EC 5.1.1.14: nocardicin-A epimerase
• EC 5.1.1.15: 2-aminohexano-6-lactam racemase
• EC 5.1.1.16: protein-serine epimerase
• EC 5.1.1.17: isopenicillin-N epimerase

EC 5.1.2: Acting on Hydroxy acids and Derivatives

• EC 5.1.2.1: lactate racemase
• EC 5.1.2.2: mandelate racemase
• EC 5.1.2.3: 3-hydroxybutyryl-CoA epimerase
• EC 5.1.2.4: acetoin racemase
• EC 5.1.2.5: tartrate epimerase
• EC 5.1.2.6: isocitrate epimerase

EC 5.1.3: Acting on Carbohydrates and Derivatives

• EC 5.1.3.1: ribulose-phosphate 3-epimerase
• EC 5.1.3.2: UDP-glucose 4-epimerase
• EC 5.1.3.3: aldose 1-epimerase
• EC 5.1.3.4: L-ribulose-5-phosphate 4-epimerase
• EC 5.1.3.5: UDP-arabinose 4-epimerase
• EC 5.1.3.6: UDP-glucuronate 4-epimerase
• EC 5.1.3.7: UDP-N-acetylglucosamine 4-epimerase
• EC 5.1.3.8: N-acylglucosamine 2-epimerase
• EC 5.1.3.9: N-acylglucosamine-6-phosphate 2-epimerase
• EC 5.1.3.10: CDP-paratose 2-epimerase
• EC 5.1.3.11: cellobiose epimerase
• EC 5.1.3.12: UDP-glucuronate 5'-epimerase
• EC 5.1.3.13: dTDP-4-dehydrorhamnose 3,5-epimerase
• EC 5.1.3.14: UDP-N-acetylglucosamine 2-epimerase
• EC 5.1.3.15: glucose-6-phosphate 1-epimerase
• EC 5.1.3.16: UDP-glucosamine 4-epimerase
• EC 5.1.3.17: heparosan-N-sulfate-glucuronate 5-epimerase
• EC 5.1.3.18: GDP-mannose 3,5-epimerase
• EC 5.1.3.19: chondroitin-glucuronate 5-epimerase
• EC 5.1.3.20: ADP-glyceromanno-heptose 6-epimerase
• EC 5.1.3.21: maltose epimerase
• EC 5.1.3.22: L-ribulose-5-phosphate 3-epimerase

EC 5.1.99: Acting on Other Compounds

• EC 5.1.99.1: methylmalonyl-CoA epimerase
• EC 5.1.99.2: 16-hydroxysteroid epimerase
• EC 5.1.99.3: allantoin racemase
• EC 5.1.99.4: a-methylacyl-CoA racemase

EC 5.2: cis-trans-Isomerases

• EC 5.2.1.1: maleate isomerase
• EC 5.2.1.2: maleylacetoacetate isomerase
• EC 5.2.1.3: retinal isomerase
• EC 5.2.1.4: maleylpyruvate isomerase
• EC 5.2.1.5: linoleate isomerase
• EC 5.2.1.6: furylfuramide isomerase
• EC 5.2.1.7: retinol isomerase
• EC 5.2.1.8: peptidylprolyl isomerase
• EC 5.2.1.9: farnesol 2-isomerase
• EC 5.2.1.10: 2-chloro-4-carboxymethylenebut-2-en-1,4-olide isomerase
• EC 5.2.1.11: deleted entry

EC 5.3: Intramolecular Oxidoreductases

EC 5.3.1: Interconverting Aldoses and Ketoses

• EC 5.3.1.1: triose-phosphate isomerase
• EC 5.3.1.2: deleted
• EC 5.3.1.3: arabinose isomerase
• EC 5.3.1.4: L-arabinose isomerase
• EC 5.3.1.5: xylose isomerase
• EC 5.3.1.6: ribose-5-phosphate isomerase
• EC 5.3.1.7: mannose isomerase
• EC 5.3.1.8: mannose-6-phosphate isomerase
• EC 5.3.1.9: glucose-6-phosphate isomerase
• EC 5.3.1.10: now EC 3.5.99.6
• EC 5.3.1.11: deleted
• EC 5.3.1.12: glucuronate isomerase
• EC 5.3.1.13: arabinose-5-phosphate isomerase
• EC 5.3.1.14: L-rhamnose isomerase
• EC 5.3.1.15: D-lyxose ketol-isomerase
• EC 5.3.1.16: 1-(5-phosphoribosyl)-5-((5-phosphoribosylamino)methylideneamino)imidazole-4-carboxamide isomerase
• EC 5.3.1.17: 4-deoxy-L-threo-5-hexosulose-uronate ketol-isomerase
• EC 5.3.1.18: deleted
• EC 5.3.1.19: now EC 2.6.1.16
• EC 5.3.1.20: ribose isomerase
• EC 5.3.1.21: corticosteroid side-chain-isomerase
• EC 5.3.1.22: hydroxypyruvate isomerase
• EC 5.3.1.23: 5-methylthioribose-1-phosphate isomerase
• EC 5.3.1.24: phosphoribosylanthranilate isomerase
• EC 5.3.1.25: L-fucose isomerase
• EC 5.3.1.26: galactose-6-phosphate isomerase

EC 5.3.2: Interconverting Keto- and Enol-Groups

• EC 5.3.2.1: phenylpyruvate tautomerase
• EC 5.3.2.2: oxaloacetate tautomerase

EC 5.3.3: Transposing C=C Bonds

• EC 5.3.3.1: steroid D-isomerase
• EC 5.3.3.2: isopentenyl-diphosphate D-isomerase
• EC 5.3.3.3: vinylacetyl-CoA D-isomerase
• EC 5.3.3.4: muconolactone D-isomerase
• EC 5.3.3.5: cholestenol D-isomerase
• EC 5.3.3.6: methylitaconate D-isomerase
• EC 5.3.3.7: aconitate D-isomerase
• EC 5.3.3.8: dodecenoyl-CoA D-isomerase
• EC 5.3.3.9: prostaglandin-A1 D-isomerase
• EC 5.3.3.10: 5-carboxymethyl-2-hydroxymuconate D-isomerase
• EC 5.3.3.11: isopiperitenone D-isomerase
• EC 5.3.3.12: L-dopachrome isomerase
• EC 5.3.3.13: polyenoic fatty acid isomerase

EC 5.3.4: Transposing S-S Bonds

• EC 5.3.4.1: protein disulfide-isomerase

EC 5.3.99: Other Intramolecular Oxidoreductases

• EC 5.3.99.1: deleted
• EC 5.3.99.2: prostaglandin-D synthase
• EC 5.3.99.3: prostaglandin-E synthase
• EC 5.3.99.4: prostaglandin-I synthase
• EC 5.3.99.5: thromboxane-A synthase
• EC 5.3.99.6: allene-oxide cyclase
• EC 5.3.99.7: styrene-oxide isomerase
• EC 5.3.99.8: capsanthin/capsorubin synthase
• EC 5.3.99.9: neoxanthin synthase

EC 5.4: Intramolecular Transferases

EC 5.4.1: Transferring Acyl Groups

• EC 5.4.1.1: lysolecithin acylmutase
• EC 5.4.1.2: precorrin-8X methylmutase

EC 5.4.2: Phosphotransferases (Phosphomutases)

• EC 5.4.2.1: phosphoglycerate mutase
• EC 5.4.2.2: phosphoglucomutase
• EC 5.4.2.3: phosphoacetylglucosamine mutase
• EC 5.4.2.4: bisphosphoglycerate mutase
• EC 5.4.2.5: phosphoglucomutase (glucose-cofactor)
• EC 5.4.2.6: b-phosphoglucomutase
• EC 5.4.2.7: phosphopentomutase
• EC 5.4.2.8: phosphomannomutase
• EC 5.4.2.9: phosphoenolpyruvate mutase
• EC 5.4.2.10: phosphoglucosamine mutase

EC 5.4.3: Transferring Amino Groups

• EC 5.4.3.1: deleted
• EC 5.4.3.2: lysine 2,3-aminomutase
• EC 5.4.3.3: b-lysine 5,6-aminomutase
• EC 5.4.3.4: D-lysine 5,6-aminomutase
• EC 5.4.3.5: D-ornithine 4,5-aminomutase
• EC 5.4.3.6: tyrosine 2,3-aminomutase
• EC 5.4.3.7: leucine 2,3-aminomutase
• EC 5.4.3.8: glutamate-1-semialdehyde 2,1-aminomutase

EC 5.4.4: Transferring hydroxy groups

• EC 5.4.4.1: (hydroxyamino)benzene mutase
• EC 5.4.4.2: isochorismate synthase
• EC 5.4.4.3: 3-(hydroxyamino)phenol mutase

EC 5.4.99: Transferring Other Groups

• EC 5.4.99.1: methylaspartate mutase
• EC 5.4.99.2: methylmalonyl-CoA mutase
• EC 5.4.99.3: 2-acetolactate mutase
• EC 5.4.99.4: 2-methyleneglutarate mutase
• EC 5.4.99.5: chorismate mutase
• EC 5.4.99.6: now EC 5.4.4.2
• EC 5.4.99.7: lanosterol synthase
• EC 5.4.99.8: cycloartenol synthase
• EC 5.4.99.9: UDP-galactopyranose mutase
• EC 5.4.99.10: deleted, included in EC 5.4.99.11
• EC 5.4.99.11: isomaltulose synthase
• EC 5.4.99.12: tRNA-pseudouridine synthase I
• EC 5.4.99.13: isobutyryl-CoA mutase
• EC 5.4.99.14: 4-carboxymethyl-4-methylbutenolide mutase
• EC 5.4.99.15: (1(arrow to right)4)-a-D-glucan 1-a-D-glucosylmutase
• EC 5.4.99.16: maltose a-D-glucosyltransferase
• EC 5.4.99.17: squalene—hopene cyclase

EC 5.5: Intramolecular Lyases

• EC 5.5.1.1: muconate cycloisomerase
• EC 5.5.1.2: 3-carboxy-cis,cis-muconate cycloisomerase
• EC 5.5.1.3: tetrahydroxypteridine cycloisomerase
• EC 5.5.1.4: inositol-3-phosphate synthase
• EC 5.5.1.5: carboxy-cis,cis-muconate cyclase
• EC 5.5.1.6: chalcone isomerase
• EC 5.5.1.7: chloromuconate cycloisomerase
• EC 5.5.1.8: bornyl diphosphate synthase
• EC 5.5.1.9: cycloeucalenol cycloisomerase
• EC 5.5.1.10: a-pinene-oxide decyclase
• EC 5.5.1.11: dichloromuconate cycloisomerase
• EC 5.5.1.12: copalyl diphosphate synthase
• EC 5.5.1.13: ent-copalyl diphosphate synthase

EC 5.99: Other Isomerases

• EC 5.99.1.1: thiocyanate isomerase
• EC 5.99.1.2: DNA topoisomerase
• EC 5.99.1.3: DNA topoisomerase (ATP-hydrolysing)