1. Oxidoreductases
2. Transferases
3. Hydrolases
3.1 Acting on ester bonds
3.2 Glycosylases
3.3 Acting on ether bonds
3.4 Acting on peptide bonds (peptidases)
3.4.11 Aminopeptidases
3.4.13 Dipeptidases
3.4.14 Dipeptidyl-peptidases and tripeptidyl-peptidases
3.4.15 Peptidyl-dipeptidases
3.4.16 Serine-type carboxypeptidases
3.4.17 Metallocarboxypeptidases
3.4.18 Cysteine-type carboxypeptidases
3.4.19 Omega peptidases
3.4.21 Serine endopeptidases
3.4.22 Cysteine endopeptidases
3.4.23 Aspartic endopeptidases
3.4.24 Metalloendopeptidases
3.4.24.1 atrolysin A
3.4.24.3 microbial collagenase
3.4.24.6 leucolysin
3.4.24.7 interstitial collagenase
3.4.24.11 neprilysin
3.4.24.12 envelysin
3.4.24.13 IgA-specific metalloendopeptidase
3.4.24.14 procollagen N-endopeptidase
3.4.24.15 thimet oligopeptidase
3.4.24.16 neurolysin
3.4.24.17 stromelysin 1
3.4.24.18 meprin A
3.4.24.19 procollagen C-endopeptidase
3.4.24.20 peptidyl-Lys metalloendopeptidase
3.4.24.21 astacin
3.4.24.22 stromelysin 2
3.4.24.23 matrilysin
3.4.24.24 gelatinase A
3.4.24.25 vibriolysin
3.4.24.26 pseudolysin
3.4.24.27 thermolysin
3.4.24.28 bacillolysin
3.4.24.29 aureolysin
3.4.24.30 coccolysin
3.4.24.31 mycolysin
3.4.24.32 beta-lytic metalloendopeptidase
3.4.24.33 peptidyl-Asp metalloendopeptidase
3.4.24.34 neutrophil collagenase
3.4.24.35 gelatinase B
3.4.24.36 leishmanolysin
3.4.24.37 saccharolysin
3.4.24.38 gametolysin
3.4.24.39 deuterolysin
3.4.24.40 serralysin
PA1249 aprA; alkaline metalloproteinase
K01406 prtC; serralysin [EC:3.4.24.40]
3.4.24.41 atrolysin B
3.4.24.42 atrolysin C
3.4.24.43 atroxase
3.4.24.44 atrolysin E
3.4.24.45 atrolysin F
3.4.24.46 adamalysin
3.4.24.47 horrilysin
3.4.24.48 ruberlysin
3.4.24.49 bothropasin
3.4.24.50 bothrolysin
3.4.24.51 ophiolysin
3.4.24.52 trimerelysin I
3.4.24.53 trimerelysin II
3.4.24.54 mucrolysin
3.4.24.55 pitrilysin
3.4.24.56 insulysin
3.4.24.57 O-sialoglycoprotein endopeptidase
3.4.24.58 russellysin
3.4.24.59 mitochondrial intermediate peptidase
3.4.24.60 dactylysin
3.4.24.61 nardilysin
3.4.24.62 magnolysin
3.4.24.63 meprin B
3.4.24.64 mitochondrial processing peptidase
3.4.24.65 macrophage elastase
3.4.24.66 choriolysin L
3.4.24.67 choriolysin H
3.4.24.68 tentoxilysin
3.4.24.69 bontoxilysin
3.4.24.70 oligopeptidase A
3.4.24.71 endothelin-converting enzyme 1
3.4.24.72 fibrolase
3.4.24.73 jararhagin
3.4.24.74 fragilysin
3.4.24.75 lysostaphin
3.4.24.76 flavastacin
3.4.24.77 snapalysin
3.4.24.78 gpr endopeptidase
3.4.24.79 pappalysin-1
3.4.24.80 membrane-type matrix metalloproteinase-1
3.4.24.81 ADAM10 endopeptidase
3.4.24.82 ADAMTS-4 endopeptidase
3.4.24.83 anthrax lethal factor endopeptidase
3.4.24.84 Ste24 endopeptidase
3.4.24.85 S2P endopeptidase
3.4.24.86 ADAM 17 endopeptidase
3.4.24.87 ADAMTS13 endopeptidase
3.4.24.89 Pro-Pro endopeptidase
3.4.25 Threonine endopeptidases
3.4.26 Glutamic endopeptidases
3.5 Acting on carbon-nitrogen bonds, other than peptide bonds
3.6 Acting on acid anhydrides
3.7 Acting on carbon-carbon bonds
3.8 Acting on halide bonds
3.9 Acting on phosphorus-nitrogen bonds
3.10 Acting on sulfur-nitrogen bonds
3.11 Acting on carbon-phosphorus bonds
3.12 Acting on sulfur-sulfur bonds
3.13 Acting on carbon-sulfur bonds
4. Lyases
5. Isomerases
6. Ligases
7. Translocases