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.


=EC 5.1: Epimerases and racemases=

EC 5.1.1: Acting on Amino acids and Derivatives

*: alanine racemase
*: methionine racemase
*: glutamate racemase
*: proline racemase
*: lysine racemase
*: threonine racemase
*: diaminopimelate epimerase
*: 4-hydroxyproline epimerase
*: arginine racemase
*: amino-acid racemase
*: phenylalanine racemase (ATP-hydrolysing)
*: ornithine racemase
*: aspartate racemase
*: nocardicin-A epimerase
*: 2-aminohexano-6-lactam racemase
*: protein-serine epimerase
*: isopenicillin-N epimerase

EC 5.1.2: Acting on Hydroxy acids and Derivatives

*: lactate racemase
*: mandelate racemase
*: 3-hydroxybutyryl-CoA epimerase
*: acetoin racemase
*: tartrate epimerase
*: isocitrate epimerase

EC 5.1.3: Acting on Carbohydrates and Derivatives

*: ribulose-phosphate 3-epimerase
*: UDP-glucose 4-epimerase
*: aldose 1-epimerase
*: L-ribulose-5-phosphate 4-epimerase
*: UDP-arabinose 4-epimerase
*: UDP-glucuronate 4-epimerase
*: UDP-N-acetylglucosamine 4-epimerase
*: N-acylglucosamine 2-epimerase
*: N-acylglucosamine-6-phosphate 2-epimerase
*: CDP-paratose 2-epimerase
*: cellobiose epimerase
*: UDP-glucuronate 5'-epimerase
*: dTDP-4-dehydrorhamnose 3,5-epimerase
*: UDP-N-acetylglucosamine 2-epimerase
*: glucose-6-phosphate 1-epimerase
*: UDP-glucosamine 4-epimerase
*: heparosan-N-sulfate-glucuronate 5-epimerase
*: GDP-mannose 3,5-epimerase
*: chondroitin-glucuronate 5-epimerase
*: ADP-glyceromanno-heptose 6-epimerase
*: maltose epimerase
*: L-ribulose-5-phosphate 3-epimerase

EC 5.1.99: Acting on Other Compounds

*: methylmalonyl-CoA epimerase
*: 16-hydroxysteroid epimerase
*: allantoin racemase
*: a-methylacyl-CoA racemase

EC 5.2: cis-trans-Isomerases

*: maleate isomerase
*: maleylacetoacetate isomerase
*: retinal isomerase
*: maleylpyruvate isomerase
*: linoleate isomerase
*: furylfuramide isomerase
*: retinol isomerase
*: peptidylprolyl isomerase
*: farnesol 2-isomerase
*: 2-chloro-4-carboxymethylenebut-2-en-1,4-olide isomerase
*: deleted entry

EC 5.3: Intramolecular Oxidoreductases

EC 5.3.1: Interconverting Aldoses and Ketoses

*: triose-phosphate isomerase
*: deleted
*: arabinose isomerase
*: L-arabinose isomerase
*: xylose isomerase
*: ribose-5-phosphate isomerase
*: mannose isomerase
*: mannose-6-phosphate isomerase
*: glucose-6-phosphate isomerase
*: now EC 3.5.99.6
*: deleted
*: glucuronate isomerase
*: arabinose-5-phosphate isomerase
*: L-rhamnose isomerase
*: D-lyxose ketol-isomerase
*: 1-(5-phosphoribosyl)-5-((5-phosphoribosylamino)methylideneamino)imidazole-4-carboxamide isomerase
*: 4-deoxy-L-threo-5-hexosulose-uronate ketol-isomerase
*: deleted
*: now EC 2.6.1.16
*: ribose isomerase
*: corticosteroid side-chain-isomerase
*: hydroxypyruvate isomerase
*: 5-methylthioribose-1-phosphate isomerase
*: phosphoribosylanthranilate isomerase
*: L-fucose isomerase
*: galactose-6-phosphate isomerase

EC 5.3.2: Interconverting Keto- and Enol-Groups

*: phenylpyruvate tautomerase
*: oxaloacetate tautomerase


=EC 5.3.3: Transposing C=C Bonds=

*: steroid D-isomerase
*: isopentenyl-diphosphate D-isomerase
*: vinylacetyl-CoA D-isomerase
*: muconolactone D-isomerase
*: cholestenol D-isomerase
*: methylitaconate D-isomerase
*: aconitate D-isomerase
*: dodecenoyl-CoA D-isomerase
*: prostaglandin-A1 D-isomerase
*: 5-carboxymethyl-2-hydroxymuconate D-isomerase
*: isopiperitenone D-isomerase
*: L-dopachrome isomerase
*: polyenoic fatty acid isomerase

EC 5.3.4: Transposing S-S Bonds

*: protein disulfide-isomerase

EC 5.3.99: Other Intramolecular Oxidoreductases

*: deleted
*: prostaglandin-D synthase
*: prostaglandin-E synthase
*: prostaglandin-I synthase
*: thromboxane-A synthase
*: allene-oxide cyclase
*: styrene-oxide isomerase
*: capsanthin/capsorubin synthase
*: neoxanthin synthase

EC 5.4: Intramolecular Transferases

EC 5.4.1: Transferring Acyl Groups

*: lysolecithin acylmutase
*: precorrin-8X methylmutase

EC 5.4.2: Phosphotransferases (Phosphomutases)

*: phosphoglycerate mutase
*: phosphoglucomutase
*: phosphoacetylglucosamine mutase
*: bisphosphoglycerate mutase
*: phosphoglucomutase (glucose-cofactor)
*: b-phosphoglucomutase
*: phosphopentomutase
*: phosphomannomutase
*: phosphoenolpyruvate mutase
*: phosphoglucosamine mutase

EC 5.4.3: Transferring Amino Groups

*: deleted
*: lysine 2,3-aminomutase
*: b-lysine 5,6-aminomutase
*: D-lysine 5,6-aminomutase
*: D-ornithine 4,5-aminomutase
*: tyrosine 2,3-aminomutase
*: leucine 2,3-aminomutase
*: glutamate-1-semialdehyde 2,1-aminomutase

EC 5.4.4: Transferring hydroxy groups

*: (hydroxyamino)benzene mutase
*: isochorismate synthase
*: 3-(hydroxyamino)phenol mutase

EC 5.4.99: Transferring Other Groups

*: methylaspartate mutase
*: methylmalonyl-CoA mutase
*: 2-acetolactate mutase
*: 2-methyleneglutarate mutase
*: chorismate mutase
*: now EC 5.4.4.2
*: lanosterol synthase
*: cycloartenol synthase
*: UDP-galactopyranose mutase
*: deleted, included in EC 5.4.99.11
*: isomaltulose synthase
*: tRNA-pseudouridine synthase I
*: isobutyryl-CoA mutase
*: 4-carboxymethyl-4-methylbutenolide mutase
*: (1(arrow to right)4)-a-D-glucan 1-a-D-glucosylmutase
*: maltose a-D-glucosyltransferase
*: squalene—hopene cyclase

EC 5.5: Intramolecular Lyases

*: muconate cycloisomerase
*: 3-carboxy-cis,cis-muconate cycloisomerase
*: tetrahydroxypteridine cycloisomerase
*: inositol-3-phosphate synthase
*: carboxy-cis,cis-muconate cyclase
*: chalcone isomerase
*: chloromuconate cycloisomerase
*: bornyl diphosphate synthase
*: cycloeucalenol cycloisomerase
*: a-pinene-oxide decyclase
*: dichloromuconate cycloisomerase
*: copalyl diphosphate synthase
*: ent-copalyl diphosphate synthase

EC 5.99: Other Isomerases

*: thiocyanate isomerase
*: DNA topoisomerase
*: DNA topoisomerase (ATP-hydrolysing)


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