1gkt

Neutron Diffraction
2.1Å resolution

Neutron Laue diffraction structure of endothiapepsin complexed with transition state analogue inhibitor H261

Released:

Function and Biology Details

Reaction catalysed:
Hydrolysis of proteins with specificity similar to that of pepsin A, prefers hydrophobic residues at P1 and P1', but does not cleave 14-Ala-|-Leu-15 in the B chain of insulin or Z-Glu-Tyr. Clots milk.
Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
PDBe Complex ID:
PDB-CPX-145949 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Endothiapepsin Chain: A
Molecule details ›
Chain: A
Length: 329 amino acids
Theoretical weight: 33.8 KDa
Source organism: Cryphonectria parasitica
UniProt:
  • Canonical: P11838 (Residues: 90-419; Coverage: 83%)
Gene names: EAPA, EPN-1
Sequence domains: Eukaryotic aspartyl protease
Structure domains: Acid Proteases
INHIBITOR, H261 Chain: B
Molecule details ›
Chain: B
Length: 8 amino acids
Theoretical weight: 1.1 KDa
Source organism: synthetic construct
Expression system: Not provided

Ligands and Environments

1 bound ligand:
1 modified residue:

Experiments and Validation Details

Spacegroup: P21
Unit cell:
a: 43.1Å b: 75.7Å c: 42.9Å α: 90° β: 97° γ: 90°
R-values:
R R work R free 0.235 not available 0.274
Expression system: Not provided