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| The enzymes in this section of the database are organized as you would find them in the
Enzyme-Nomenclature book. Click [+] to expand, and [–] to collapse, any section. Clicking on a heading will open a popup window with information on that class, subclass or sub-subclass. For a fully expanded list of the classes, subclasses and sub-subclasses, click here |
| EC 1 | [+] | ||
| EC 2 | [+] | ||
| EC 3 | [+] | ||
| EC 4 | [+] | ||
| EC 5 | [+] | ||
| EC 6 | [–] | ||
| EC 6.1 | [+] | ||
| EC 6.2 | [+] | ||
| EC 6.3 | [–] | ||
| EC 6.3.1 | [+] Acid—ammonia (or amine) ligases (amide synthases) | ||
| EC 6.3.2 | [–] Acid—amino-acid ligases (peptide synthases) | ||
| EC 6.3.2.1 | pantoate—β-alanine ligase (AMP-forming) | ||
| EC 6.3.2.2 | glutamate—cysteine ligase | ||
| EC 6.3.2.3 | glutathione synthase | ||
| EC 6.3.2.4 | D-alanine—D-alanine ligase | ||
| EC 6.3.2.5 | phosphopantothenate—cysteine ligase (CTP) | ||
| EC 6.3.2.6 | phosphoribosylaminoimidazolesuccinocarboxamide synthase | ||
| EC 6.3.2.7 | UDP-N-acetylmuramoyl-L-alanyl-D-glutamate—L-lysine ligase | ||
| EC 6.3.2.8 | UDP-N-acetylmuramate—L-alanine ligase | ||
| EC 6.3.2.9 | UDP-N-acetylmuramoyl-L-alanine—D-glutamate ligase | ||
| EC 6.3.2.10 | UDP-N-acetylmuramoyl-tripeptide—D-alanyl-D-alanine ligase | ||
| EC 6.3.2.11 | carnosine synthase | ||
| EC 6.3.2.12 | dihydrofolate synthase | ||
| EC 6.3.2.13 | UDP-N-acetylmuramoyl-L-alanyl-D-glutamate—2,6-diaminopimelate ligase | ||
| EC 6.3.2.14 | enterobactin synthase | ||
| EC 6.3.2.15 | UDP-N-acetylmuramoylalanyl-D-glutamyl-2,6-diaminopimelate-D-alanyl-D-alanine ligase. The activity observed is due to EC 6.3.2.10, UDP-N-acetylmuramoyl-tripeptide—D-alanyl-D-alanine ligase | ||
| EC 6.3.2.16 | D-alanine—alanyl-poly(glycerolphosphate) ligase | ||
| EC 6.3.2.17 | tetrahydrofolate synthase | ||
| EC 6.3.2.18 | γ-glutamylhistamine synthase | ||
| EC 6.3.2.19 | ubiquitin—protein ligase. The ubiquitinylation process is now known to be performed by several enzymes in sequence, starting with EC 6.2.1.45 (ubiquitin-activating enzyme E1) and followed by several transfer reactions, including those of EC 2.3.2.23 (E2 ubiquitin-conjugating enzyme) and EC 2.3.2.27 (RING-type E3 ubiquitin transferase) | ||
| EC 6.3.2.20 | indoleacetate—lysine synthetase | ||
| EC 6.3.2.21 | ubiquitin—calmodulin ligase. The reaction is performed by the sequential action of EC 6.2.1.45 (ubiquitin-activating enzyme E1), several ubiquitin transferases and finally by EC 2.3.2.27 [ubiquitin transferase RING E3 (calmodulin-selective)] | ||
| EC 6.3.2.22 | diphthine—ammonia ligase. Now EC 6.3.1.14, diphthine—ammonia ligase. | ||
| EC 6.3.2.23 | homoglutathione synthase | ||
| EC 6.3.2.24 | tyrosine—arginine ligase | ||
| EC 6.3.2.25 | tubulin—tyrosine ligase | ||
| EC 6.3.2.26 | N-(5-amino-5-carboxypentanoyl)-L-cysteinyl-D-valine synthase | ||
| EC 6.3.2.27 | The activity is covered by two independent enzymes, EC 6.3.2.38 N2-citryl-N6-acetyl-N6-hydroxylysine synthase, and EC 6.3.2.39, aerobactin synthase | ||
| EC 6.3.2.28 | L-amino-acid α-ligase. Now EC 6.3.2.49, L-alanine-L-anticapsin ligase | ||
| EC 6.3.2.29 | cyanophycin synthase (L-aspartate-adding) | ||
| EC 6.3.2.30 | cyanophycin synthase (L-arginine-adding) | ||
| EC 6.3.2.31 | coenzyme F420-0:L-glutamate ligase | ||
| EC 6.3.2.32 | coenzyme γ-F420-2:α-L-glutamate ligase | ||
| EC 6.3.2.33 | tetrahydrosarcinapterin synthase | ||
| EC 6.3.2.34 | coenzyme F420-1:γ-L-glutamate ligase | ||
| EC 6.3.2.35 | D-alanine—D-serine ligase | ||
| EC 6.3.2.36 | 4-phosphopantoate—β-alanine ligase | ||
| EC 6.3.2.37 | UDP-N-acetylmuramoyl-L-alanyl-D-glutamate—D-lysine ligase | ||
| EC 6.3.2.38 | N2-citryl-N6-acetyl-N6-hydroxylysine synthase | ||
| EC 6.3.2.39 | aerobactin synthase | ||
| EC 6.3.2.40 | cyclopeptine synthase | ||
| EC 6.3.2.41 | N-acetylaspartylglutamate synthase | ||
| EC 6.3.2.42 | N-acetylaspartylglutamylglutamate synthase | ||
| EC 6.3.2.43 | [amino-group carrier protein]—L-2-aminoadipate ligase | ||
| EC 6.3.2.44 | pantoate—β-alanine ligase (ADP-forming) | ||
| EC 6.3.2.45 | UDP-N-acetylmuramate—L-alanyl-γ-D-glutamyl-meso-2,6-diaminoheptanedioate ligase | ||
| EC 6.3.2.46 | fumarate—(S)-2,3-diaminopropanoate ligase | ||
| EC 6.3.2.47 | dapdiamide synthase | ||
| EC 6.3.2.48 | L-arginine-specific L-amino acid ligase | ||
| EC 6.3.2.49 | L-alanine—L-anticapsin ligase | ||
| EC 6.3.2.50 | tenuazonic acid synthetase | ||
| EC 6.3.2.51 | phosphopantothenate—cysteine ligase (ATP) | ||
| EC 6.3.2.52 | jasmonoyl—L-amino acid ligase | ||
| EC 6.3.2.53 | UDP-N-acetylmuramoyl-L-alanine—L-glutamate ligase | ||
| EC 6.3.2.54 | L-2,3-diaminopropanoate—citrate ligase | ||
| EC 6.3.2.55 | 2-[(L-alanin-3-ylcarbamoyl)methyl]-3-(2-aminoethylcarbamoyl)-2-hydroxypropanoate synthase | ||
| EC 6.3.2.56 | staphyloferrin B synthase | ||
| EC 6.3.2.57 | staphyloferrin A synthase | ||
| EC 6.3.2.58 | D-ornithine—citrate ligase | ||
| EC 6.3.2.59 | 3-methyl-D-ornithine—L-lysine ligase | ||
| EC 6.3.2.60 | glutamate—[amino group carrier protein] ligase | ||
| EC 6.3.2.61 | tubulin-glutamate ligase | ||
| EC 6.3.2.62 | β-tubulin-glutamate ligase | ||
| EC 6.3.2.63 | putrebactin synthase | ||
| EC 6.3.2.64 | bisucaberin synthase | ||
| EC 6.3.2.65 | UDP-2-acetamido-4-amino-2,4,6-trideoxy-α-D-galactose:2-oxoglutarate ligase | ||
| EC 6.3.3 | [+] Cyclo-ligases | ||
| EC 6.3.4 | [+] Other carbon-nitrogen ligases | ||
| EC 6.3.5 | [+] Carbon-nitrogen ligases with glutamine as amido-N-donor | ||
| EC 6.4 | [+] | ||
| EC 6.5 | [+] | ||
| EC 6.6 | [+] | ||
| EC 6.7 | [+] | ||
| EC 7 | [+] |