› 1dtd

X-ray diffraction
1.65Å resolution

CRYSTAL STRUCTURE OF THE COMPLEX BETWEEN THE LEECH CARBOXYPEPTIDASE INHIBITOR AND THE HUMAN CARBOXYPEPTIDASE A2 (LCI-CPA2)

Released:
DOI: 10.2210/pdb1dtd/pdb
PDB entry 1dtd coloured by chain, front view.
PDB entry 1dtd coloured by chain, side view.
PDB entry 1dtd coloured by chain, top view.
Source organisms:
Primary publication:
Structure of a novel leech carboxypeptidase inhibitor determined free in solution and in complex with human carboxypeptidase A2.
Reverter D, Fernández-Catalán C, Baumgartner R, Pfänder R, Huber R, Bode W, Vendrell J, Holak TA, Avilés FX
Nat Struct Biol 7 322-8 (2000)
PMID: 10742178

Function and Biology Details

Reaction catalysed: 
Similar to that of carboxypeptidase A (EC 3.4.17.1), but with a preference for bulkier C-terminal residues.
Biochemical function:
Biological process:
Cellular component:
  • not assigned
Sequence domains:
Structure domains:

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-155698 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Carboxypeptidase A2 Chain: A
Molecule details ›
Chain: A
Length: 303 amino acids
Theoretical weight: 33.66 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P48052 (Residues: 118-244, 245-419; Coverage: 75%)
Gene name: CPA2
Sequence domains: Zinc carboxypeptidase
Structure domains: Zn peptidases
Metallocarboxypeptidase inhibitor Chain: B
Molecule details ›
Chain: B
Length: 61 amino acids
Theoretical weight: 6.79 KDa
Source organism: Hirudo medicinalis
UniProt:
  • Canonical: P81511 (Residues: 20-80; Coverage: 92%)
Structure domains: Carboxypeptidase inhibitor

Ligands and Environments

2 bound ligands:
Ligand ZN 1 x ZN
Ligand GLU 1 x GLU
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU
Spacegroup: P3221
Unit cell:
a: 80.439Å b: 80.439Å c: 114.464Å
α: 90° β: 90° γ: 120°
R-values:
R R work R free
0.187 0.187 0.234

Quick links

Citations

8 review citations

Evolutionary families of peptidase inhibitors.
Rawlings et al. (2004)
7 more

18 mentions without citation

Conserved residue clusters at protein-protein interfaces and their use in binding site identification.
Guharoy et al. (2010)
17 more