ENZYME entry: EC 3.4.15.4

Accepted Name
Peptidyl-dipeptidase B.
Alternative Name(s)
Atrial di-(tri-)peptidyl carboxylase.
Atriopeptin convertase.
Dipeptidyl carboxyhydrolase.
Reaction catalysed
Release of a C-terminal dipeptide or exceptionally a tripeptide
Cofactor(s)
Zn(2+).
Comment(s)
  • A membrane-bound, zinc metallopeptidase located in mammalian atrial, but not ventricular, myocytes.
  • Although it is capable of converting the 126-residue atriopeptin III directly to atriopeptin I by releasing a C-terminal tripeptide Phe- Arg-Tyr, it is generally restricted to the release of dipeptides.
  • In contrast to EC 3.4.15.1 it displays no chlorine dependence and shows no action on angiotensin I.
  • Conversely, peptidyl-dipeptidase a is unable to release Phe-Arg from the C-terminus of atriopeptin II.
Cross-references
BRENDA3.4.15.4
EC2PDB3.4.15.4
ExplorEnz3.4.15.4
PRIAM enzyme-specific profiles3.4.15.4
KEGG Ligand Database for Enzyme Nomenclature3.4.15.4
IUBMB Enzyme Nomenclature3.4.15.4
IntEnz3.4.15.4
MEDLINEFind literature relating to 3.4.15.4
MetaCyc3.4.15.4

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All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 3.4.15.-
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All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 3.-.-.-