Nomenclature Committee of the International Union of Biochemistry and Molecular Biology (NC-IUBMB)

Enzyme Nomenclature. Recommendations

EC 3.4

Acting on peptide bonds (Peptidases)

See the introduction for details of the different approach needed for peptidase nomenclature.


EC 3.4.1 α-Amino-Acyl-Peptide Hydrolases (now in EC 3.4.11)

EC 3.4.2 Peptidyl-Amino-Acid Hydrolases (now in EC 3.4.17)

EC 3.4.3 Dipeptide Hydrolases (now in EC 3.4.13)

EC 3.4.4 Peptidyl Peptide Hydrolases (now reclassified within EC 3.4)

EC 3.4.11 Aminopeptidases

EC 3.4.12 Peptidylamino-Acid Hydrolases or Acylamino-Acid Hydrolases (now reclassified within EC 3.4)

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

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