Table 3.
Enzyme Isolated | Enzyme Class | Active Site Residue (s) | Isolated Source | Reference |
---|---|---|---|---|
Clostripain, Streptopain | Cysteine proteases | Cysteine and histidine residues | C. histolyticum, S. griseus | [98,99] |
Pepsins, proteases, rennet like proteases | Aspartic endoproteases | Two aspartate residues | A. niger, M. miehei | [100,101] |
Chymotrypsins, subtilisins | Serine proteases | Serine residues | B. sphaericus | [102,103] |
Collagenases, elastase | Metalloendoproteases | Metal ions |
C. histolyticum, P. aeruginosa |
[104,105] |
Eqolisin protease | Glutamic proteases | Glutamate residues | S. lignicola, A. niger | [106,107] |
Pepsins (A1), retropepsin (A2) | Acidic proteases | - | A. niger, A. saitoi. | [108,109] |
Subtilisin, carlsberg | Alkaline proteases | - | A. salinivibrio, C. aureus | [109] |
Neutrase, thermolysin | Neutral proteases | - | Bacillus sp. | [109] |