7usp

X-ray diffraction
2.85Å resolution

Crystal Structure of Caspase-3 with Peptide Inhibitor AcITV(Orn)D-CHO

Released:

Function and Biology Details

Reaction catalysed:
Strict requirement for an Asp residue at positions P1 and P4. It has a preferred cleavage sequence of Asp-Xaa-Xaa-Asp-|- with a hydrophobic amino-acid residue at P2 and a hydrophilic amino-acid residue at P3, although Val or Ala are also accepted at this position
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
hetero hexamer (preferred)
PDBe Complex ID:
PDB-CPX-154759 (preferred)
Entry contents:
3 distinct polypeptide molecules
Macromolecules (3 distinct):
Caspase-3 subunit p17 Chains: A, C
Molecule details ›
Chains: A, C
Length: 147 amino acids
Theoretical weight: 16.64 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P42574 (Residues: 29-175; Coverage: 53%)
Gene names: CASP3, CPP32
Sequence domains: Caspase domain
Caspase-3 subunit p12 Chains: B, D
Molecule details ›
Chains: B, D
Length: 102 amino acids
Theoretical weight: 11.91 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P42574 (Residues: 176-277; Coverage: 37%)
Gene names: CASP3, CPP32
Sequence domains: Caspase domain
Peptide Inhibitor AcITV(Orn)D-CHO Chains: F, G
Molecule details ›
Chains: F, G
Length: 5 amino acids
Theoretical weight: 561 Da
Source organism: Homo sapiens
Expression system: Escherichia coli

Ligands and Environments

No bound ligands
1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 17-ID
Spacegroup: P21
Unit cell:
a: 50.117Å b: 66.133Å c: 83.044Å
α: 90° β: 90.88° γ: 90°
R-values:
R R work R free
0.182 0.178 0.254
Expression system: Escherichia coli