CATH Classification

Domain Context

CATH Clusters

Superfamily Peptidase/esterase 'gauge' domain
Functional Family

Enzyme Information

3.4.19.1
Acylaminoacyl-peptidase.
based on mapping to UniProt Q9YBQ2
Cleavage of an N-acetyl or N-formyl amino acid from the N-terminus of a polypeptide.
-!- Best if P1 = Ser, Ala, Met; poor if P1 = Gly, Tyr, Asp, Asn or Pro. -!- Group of similar enzymes liberating N-acetyl or N-formyl amino acid from proteins and peptides. -!- Active at neutral pH. -!- Several variants of this enzyme exist; the human erythrocyte enzyme is relatively specific for removal of N-acetylalanine from peptides. -!- Display dipeptidyl-peptidase activity on glycyl-peptides, perhaps as a result of misrecognition of the glycyl residue as an uncharged N-acyl group. -!- Inhibited by diisopropyl fluorophosphate. -!- Belongs to peptidase family S9C. -!- Formerly EC 3.4.14.3.

UniProtKB Entries (1)

Q9YBQ2
APEH_AERPE
Aeropyrum pernix K1
Acylamino-acid-releasing enzyme

PDB Structure

PDB 2HU5
External Links
Method X-RAY DIFFRACTION
Organism Escherichia
Primary Citation
The Acylaminoacyl Peptidase from Aeropyrum pernix K1 Thought to Be an Exopeptidase Displays Endopeptidase Activity
Kiss, A.L., Hornung, B., Radi, K., Gengeliczki, Z., Sztaray, B., Juhasz, T., Szeltner, Z., Harmat, V., Polgar, L.
J.Mol.Biol.
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