4n79

X-ray diffraction
2.62Å resolution

Structure of Cathepsin K-dermatan sulfate complex

Released:
Source organism: Homo sapiens
Primary publication:
Structural basis of collagen fiber degradation by cathepsin K.
Proc Natl Acad Sci U S A 111 17474-9 (2014)
PMID: 25422423

Function and Biology Details

Reaction catalysed:
Broad proteolytic activity. With small-molecule substrates and inhibitors, the major determinant of specificity is P2, which is preferably Leu, Met > Phe, and not Arg.
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-154996 (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecules (2 distinct):
Cathepsin K Chain: A
Molecule details ›
Chain: A
Length: 215 amino acids
Theoretical weight: 23.52 KDa
Source organism: Homo sapiens
Expression system: Komagataella pastoris
UniProt:
  • Canonical: P43235 (Residues: 115-329; Coverage: 69%)
Gene names: CTSK, CTSO, CTSO2
Sequence domains: Papain family cysteine protease
Structure domains: Cysteine proteinases

Ligands and Environments

Carbohydrate polymer : NEW Components: ASG, IDR
No bound ligands
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL7-1
Spacegroup: P212121
Unit cell:
a: 31.83Å b: 67.29Å c: 90.8Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.23 0.228 0.26
Expression system: Komagataella pastoris