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[]

EC 5.1.2: Acting on Hydroxy acids and Derivatives[]

EC 5.1.3: Acting on Carbohydrates and Derivatives[]

EC 5.1.99: Acting on Other Compounds[]

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: Deleted, transferred to EC 3.1.1.64
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 5.2.1.12: zeta-carotene isomerase
EC 5.2.1.13: prolycopene isomerase
EC 5.2.1.14: beta-carotene isomerase

EC 5.3: Intramolecular Oxidoreductases[]

EC 5.3.1: Interconverting Aldoses and Ketoses[]

EC 5.3.2: Interconverting Keto- and Enol-Groups[]

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 5.3.3.14: trans-2-decenoyl-(acyl-carrier protein) isomerase
EC 5.3.3.15: ascopyrone tautomerase, now EC 5.3.2.7
EC 5.3.3.16: 4-oxalomesaconate tautomerase, now EC 5.3.2.8
EC 5.3.3.17: trans-2,3-dihydro-3-hydroxyanthranilate isomerase
EC 5.3.3.18: 2-(1,2-epoxy-1,2-dihydrophenyl)acetyl-CoA 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 5.3.99.10: thiazole tautomerase

EC 5.4: Intramolecular Transferases[]

EC 5.4.1: Transferring Acyl Groups[]

EC 5.4.2: Phosphotransferases (Phosphomutases)[]

EC 5.4.2.1: phosphoglycerate mutase: Transferred to EC 5.4.2.11 and EC 5.4.2.12
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 5.4.2.11: phosphoglycerate mutase
EC 5.4.2.12: phosphoglycerate mutase

EC 5.4.3: Transferring Amino Groups[]

EC 5.4.4: Transferring hydroxy groups[]

EC 5.4.99: Transferring Other Groups[]

EC 5.5: Intramolecular Lyases[]

EC 5.99: Other Isomerases[]

v t e Enzymes
Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis
Regulation	Allosteric regulation Cooperativity Enzyme inhibitor Enzyme activator
Classification	EC number Enzyme superfamily Enzyme family List of enzymes
Kinetics	Enzyme kinetics Eadie–Hofstee diagram Hanes–Woolf plot Lineweaver–Burk plot Michaelis–Menten kinetics
Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list) EC7 Translocases (list)

v t e Isomerases: Epimerase and racemases (EC 5.1)
5.1.1: Amino acids	Amino-acid racemase: Phenylalanine racemase (ATP-hydrolysing) Serine racemase
5.1.2: Hydroxy acids	Mandelate racemase
5.1.3: Carbohydrates	UDP-glucose 4-epimerase N-acetylneuraminate epimerase
5.1.99: Other	Methylmalonyl CoA epimerase

v t e Isomerases: intramolecular oxidoreductases (EC 5.3)
5.3.1: Aldoses/Ketoses	Triosephosphate isomerase Ribose-5-phosphate isomerase Mannose phosphate isomerase Glucose isomerase
5.3.2: Keto/Enol	Phenylpyruvate tautomerase Oxaloacetate tautomerase
5.3.3: C = C	Steroid D-isomerase Isopentenyl-diphosphate delta isomerase Vinylacetyl-CoA D-isomerase Muconolactone D-isomerase Cholestenol Delta-isomerase (EBP) Methylitaconate D-isomerase Aconitate Delta-isomerase Enoyl CoA isomerase Prostaglandin-A1 Delta-isomerase 5-carboxymethyl-2-hydroxymuconate D-isomerase Isopiperitenone D-isomerase L-dopachrome isomerase Polyenoic fatty acid isomerase
5.3.4: S-S	Protein disulfide-isomerase (PDIA3)
5.3.99: other	Prostaglandin D2 synthase/Prostaglandin-D synthase Prostaglandin E synthase Prostacyclin synthase Thromboxane-A synthase

v t e Isomerase: mutases (EC 5.4)
5.4.1 Acyl Groups	Lysolecithin acylmutase Precorrin-8X methylmutase
5.4.2 Phosphomutases	Phosphoglycerate mutase Bisphosphoglycerate mutase Phosphoglucomutase Phosphomannomutase PMM1 PMM2 Phosphoenolpyruvate mutase
5.4.99 Other groups	Methylmalonyl-CoA mutase Lanosterol synthase Lupeol synthase

Isomerase: Intramolecular Lyases (EC 5.5)

5.5.1 Intramolecular Lyases