EC Explorer

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EC Tree

1 Oxidoreductases

4.1 Carbon-carbon lyases

4.2 Carbon-oxygen lyases

4.3 Carbon-nitrogen lyases

4.4 Carbon-sulfur lyases

4.5 Carbon-halide lyases

4.6 Phosphorus-oxygen lyases

4.7 carbon-phosphorus lyases

4.8 Nitrogen-oxygen lyases

4.98 ATP-independent chelatases

4.99 Other lyases

5.1 Racemases and epimerases

5.2 cis-trans-Isomerases

5.3 Intramolecular oxidoreductases

5.4 Intramolecular transferases

5.4.1 Transferring acyl groups

5.4.2 Phosphotransferases (phosphomutases)

5.4.3 Transferring amino groups

5.4.4 Transferring hydroxy groups

5.4.99 Transferring other groups

5.4.99.1 methylaspartate mutase

5.4.99.2 methylmalonyl-CoA mutase

5.4.99.3 2-acetolactate mutase

5.4.99.4 2-methyleneglutarate mutase

5.4.99.5 chorismate mutase

5.4.99.6 created 1972, deleted 2003

5.4.99.7 lanosterol synthase

5.4.99.8 cycloartenol synthase

5.4.99.9 UDP-galactopyranose mutase

5.4.99.10 created 1984, deleted 1992

5.4.99.11 isomaltulose synthase

5.4.99.12 tRNA pseudouridine^38-40 synthase

5.4.99.13 isobutyryl-CoA mutase

5.4.99.14 4-carboxymethyl-4-methylbutenolide mutase

5.4.99.15 (1→4)-α-D-glucan 1-α-D-glucosylmutase

5.4.99.16 maltose α-D-glucosyltransferase

5.4.99.17 squalene—hopene cyclase

5.4.99.18 5-(carboxyamino)imidazole ribonucleotide mutase

5.4.99.19 16S rRNA pseudouridine⁵¹⁶ synthase

5.4.99.20 23S rRNA pseudouridine²⁴⁵⁷ synthase

5.4.99.21 23S rRNA pseudouridine²⁶⁰⁴ synthase

5.4.99.22 23S rRNA pseudouridine²⁶⁰⁵ synthase

5.4.99.23 23S rRNA pseudouridine^{1911/1915/1917} synthase

5.4.99.24 23S rRNA pseudouridine^{955/2504/2580} synthase

5.4.99.25 tRNA pseudouridine⁵⁵ synthase

5.4.99.26 tRNA pseudouridine⁶⁵ synthase

5.4.99.27 tRNA pseudouridine¹³ synthase

5.4.99.28 tRNA pseudouridine³² synthase

5.4.99.29 23S rRNA pseudouridine⁷⁴⁶ synthase

5.4.99.30 UDP-arabinopyranose mutase

5.4.99.31 thalianol synthase

5.4.99.32 protostadienol synthase

5.4.99.33 cucurbitadienol synthase

5.4.99.34 germanicol synthase

5.4.99.35 taraxerol synthase

5.4.99.36 isomultiflorenol synthase

5.4.99.37 dammaradiene synthase

5.4.99.38 camelliol C synthase

5.4.99.39 β-amyrin synthase

5.4.99.40 α-amyrin synthase

5.4.99.41 lupeol synthase

5.4.99.42 tRNA pseudouridine³¹ synthase

5.4.99.43 21S rRNA pseudouridine²⁸¹⁹ synthase

5.4.99.44 mitochondrial tRNA pseudouridine^27/28 synthase

5.4.99.45 tRNA pseudouridine^38/39 synthase

5.4.99.46 shionone synthase

5.4.99.47 parkeol synthase

5.4.99.48 achilleol B synthase

5.4.99.49 glutinol synthase

5.4.99.50 friedelin synthase

5.4.99.51 baccharis oxide synthase

5.4.99.52 α-seco-amyrin synthase

5.4.99.53 marneral synthase

5.4.99.54 β-seco-amyrin synthase

5.4.99.55 δ-amyrin synthase

5.4.99.56 tirucalladienol synthase

5.4.99.57 baruol synthase

5.4.99.58 methylornithine synthase

5.4.99.59 dTDP-fucopyranose mutase

5.4.99.60 cobalt-precorrin-8 methylmutase

5.4.99.61 precorrin-8X methylmutase

5.4.99.62 D-ribose pyranase

5.4.99.63 ethylmalonyl-CoA mutase

5.4.99.64 2-hydroxyisobutanoyl-CoA mutase

5.4.99.65 pre-α-onocerin synthase

5.4.99.66 α-onocerin synthase

5.4.99.67 4-amino-4-deoxychorismate mutase

5.5 Intramolecular lyases

5.5.1 Intramolecular lyases (only sub-subclass identified to date)

5.6 Isomerases altering macromolecular conformation

5.99 Other isomerases

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Release 2023.1 (January 2023)