PDBe 1s4v

X-ray diffraction
2Å resolution

The 2.0 A crystal structure of the KDEL-tailed cysteine endopeptidase functioning in programmed cell death of Ricinus communis endosperm


Function and Biology Details

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Vignain Chains: A, B
Molecule details ›
Chains: A, B
Length: 229 amino acids
Theoretical weight: 24.6 KDa
Source organism: Ricinus communis
  • Canonical: O65039 (Residues: 125-353; Coverage: 67%)
Gene name: CYSEP
Sequence domains: Papain family cysteine protease
Structure domains: Cysteine proteinases
DVA-LEU-LYS-0QE peptide Chains: C, D
Molecule details ›
Chains: C, D
Length: 4 amino acids
Theoretical weight: 392 Da
Source organism: Ricinus communis

Ligands and Environments

1 bound ligand:

1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU
Spacegroup: P212121
Unit cell:
a: 36.448Å b: 68.162Å c: 163.78Å
α: 90° β: 90° γ: 90°
R R work R free
0.181 0.181 0.226