PDBe 4quh

X-ray diffraction
1.76Å resolution

Caspase-3 T140G

Source organism: Homo sapiens

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
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero pentamer (preferred)
Entry contents:
3 distinct polypeptide molecules
Macromolecules (3 distinct):
Caspase-3 Chains: A, C
Molecule details ›
Chains: A, C
Length: 277 amino acids
Theoretical weight: 31.61 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
  • Canonical: P42574 (Residues: 1-277; Coverage: 100%)
Gene names: CASP3, CPP32
Sequence domains: Caspase domain
Structure domains: Rossmann fold
short peptde Chain: D
Molecule details ›
Chain: D
Length: 5 amino acids
Theoretical weight: 519 Da
Source organism: Homo sapiens
Expression system: Not provided
Molecule details ›
Chains: I, J
Length: 6 amino acids
Theoretical weight: 535 Da
Source organism: Homo sapiens
Expression system: Not provided

Ligands and Environments

3 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 22-ID
Spacegroup: C2
Unit cell:
a: 113.973Å b: 96.845Å c: 68.866Å
α: 90° β: 129.95° γ: 90°
R R work R free
0.155 0.154 0.187
Expression systems:
  • Escherichia coli
  • Not provided