The Enzyme Database

Table of Contents

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 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

[+subclass]. [+sub-subclass]. [+serial]

EC 1 [+]   
EC 2 [+]   
EC 3 []   
    EC 3.1  [+]      
    EC 3.2  [+]      
    EC 3.3  [+]      
    EC 3.4  []      
        EC 3.4.1       [+]    α-Amino-acyl-peptide hydrolases (deleted sub-subclass) 
        EC 3.4.2       [+]    Peptidyl-amino-acid hydrolases (deleted sub-subclass) 
        EC 3.4.3       [+]    Dipeptide hydrolases (deleted sub-subclass) 
        EC 3.4.4       []    Peptidyl peptide hydrolases (deleted sub-subclass) 
                EC 3.4.4.1                      pepsin. Now EC 3.4.23.1, pepsin A 
                EC 3.4.4.2                      pepsin B. Now EC 3.4.23.2, pepsin B 
                EC 3.4.4.3                      rennin. Now EC 3.4.23.4, chymosin 
                EC 3.4.4.4                      trypsin. Now EC 3.4.21.4, trypsin 
                EC 3.4.4.5                      chymotrypsin. Now EC 3.4.21.1, chymotrypsin 
                EC 3.4.4.6                      chymotrypsin B. Now EC 3.4.21.1, chymotrypsin 
                EC 3.4.4.7                      elastase. Now covered by EC 3.4.21.36, pancreatic elastase and EC 3.4.21.37, leukocyte elastase 
                EC 3.4.4.8                      enteropeptidase. Now EC 3.4.21.9, enteropeptidase 
                EC 3.4.4.9                      cathepsin C. Now EC 3.4.14.1, dipeptidyl-peptidase I 
                EC 3.4.4.10                      papain. Now EC 3.4.22.2, papain 
                EC 3.4.4.11                      chymopapain. Now EC 3.4.22.6, chymopapain 
                EC 3.4.4.12                      ficin. Now EC 3.4.22.3, ficain 
                EC 3.4.4.13                      thrombin. Now EC 3.4.21.5, thrombin 
                EC 3.4.4.14                      plasmin. Now EC 3.4.21.7, plasmin 
                EC 3.4.4.15                      renin. Now EC 3.4.23.15, renin 
                EC 3.4.4.16                      subtilopeptidase A. Now covered by the microbial serine proteinases EC 3.4.21.62 (subtilisin), EC 3.4.21.63 (oryzin), EC 3.4.21.64 (endopeptidase K), EC 3.4.21.65 (thermomycolin), EC 3.4.21.66 (thermitase) and EC 3.4.21.67 (ndopeptidase So) 
                EC 3.4.4.17                      aspergillopeptidase A. Now covered by the microbial aspartic proteinases EC 3.4.23.20 (penicillopepsin), EC 3.4.23.21 (rhizopuspepsin), EC 3.4.23.22 (endothiapepsin), EC 3.4.23.23 (mucorpepsin), EC 3.4.23.24 (candidapepsin), EC 3.4.23.25 (saccharopepsin), EC 3.4.23.26 (rhodotorulapepsin), EC 3.4.21.103 (physarolisin), EC 3.4.23.28 (acrocylindropepsin), EC 3.4.23.29 (polyporopepsin) and EC 3.4.23.30 (pycnoporopepsin) 
                EC 3.4.4.18                      streptococcus peptidase A. Now EC 3.4.22.10, streptopain 
                EC 3.4.4.19                      clostridiopeptidase A. Now EC 3.4.24.3, microbial collagenase 
                EC 3.4.4.20                      clostridiopeptidase B. Now EC 3.4.22.8, clostripain 
                EC 3.4.4.21                      kallikrein. Now EC 3.4.21.34 (plasma kallikrein) and EC 3.4.21.35 (tissue kallikrein) 
                EC 3.4.4.22                      now EC 3.4.23.3, gastricsin 
                EC 3.4.4.23                      now EC 3.4.23.5, cathepsin D 
                EC 3.4.4.24                      now covered by EC 3.4.22.32 (stem bromelain) and EC 3.4.22.33 (fruit bromelain) 
                EC 3.4.4.25                      Streptomyces alkalophilic keratinase 
        EC 3.4.11       [+]    Aminopeptidases 
        EC 3.4.12       [+]    Peptidylamino-acid hydrolases or acylamino-acid hydrolases (deleted sub-subclass) 
        EC 3.4.13       [+]    Dipeptidases 
        EC 3.4.14       [+]    Dipeptidyl-peptidases and tripeptidyl-peptidases 
        EC 3.4.15       [+]    Peptidyl-dipeptidases 
        EC 3.4.16       [+]    Serine-type carboxypeptidases 
        EC 3.4.17       [+]    Metallocarboxypeptidases 
        EC 3.4.18       [+]    Cysteine-type carboxypeptidases 
        EC 3.4.19       [+]    Omega peptidases 
        EC 3.4.21       [+]    Serine endopeptidases 
        EC 3.4.22       [+]    Cysteine endopeptidases 
        EC 3.4.23       [+]    Aspartic endopeptidases 
        EC 3.4.24       [+]    Metalloendopeptidases 
        EC 3.4.25       [+]    Threonine endopeptidases 
        EC 3.4.99       [+]    Endopeptidases of unknown catalytic mechanism (sub-subclass is currently empty) 
    EC 3.5  [+]      
    EC 3.6  [+]      
    EC 3.7  [+]      
    EC 3.8  [+]      
    EC 3.9  [+]      
    EC 3.10  [+]      
    EC 3.11  [+]      
    EC 3.12  [+]      
    EC 3.13  [+]      
EC 4 [+]   
EC 5 [+]   
EC 6 [+]   


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