› 1tl9

X-ray diffraction
1.8Å resolution

High resolution crystal structure of calpain I protease core in complex with leupeptin

Released:
DOI: 10.2210/pdb1tl9/pdb
PDB entry 1tl9 coloured by chain, front view.
PDB entry 1tl9 coloured by chain, side view.
PDB entry 1tl9 coloured by chain, top view.
Source organisms:
Primary publication:
Crystal structures of calpain-E64 and -leupeptin inhibitor complexes reveal mobile loops gating the active site.
Moldoveanu T, Campbell RL, Cuerrier D, Davies PL
J Mol Biol 343 1313-26 (2004)
PMID: 15491615

Function and Biology Details

Reaction catalysed: 
Broad endopeptidase specificity.
Biochemical function:
Biological process:
Cellular component:
  • not assigned
Sequence domains:
Structure domain:

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-161317 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Calpain-1 catalytic subunit Chain: A
Molecule details ›
Chain: A
Length: 339 amino acids
Theoretical weight: 38.8 KDa
Source organism: Rattus norvegicus
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P97571 (Residues: 26-356; Coverage: 46%)
Gene names: Capn1, Cls1
Sequence domains: Calpain family cysteine protease
Structure domains: Cysteine proteinases
leupeptin inhibitor Chain: B
Molecule details ›
Chain: B
Length: 4 amino acids
Theoretical weight: 430 Da
Source organism: Streptomyces roseus
Expression system: Not provided

Ligands and Environments

1 bound ligand:
Ligand CA 2 x CA
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RU200
Spacegroup: P212121
Unit cell:
a: 55.67Å b: 68.16Å c: 91.14Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.217 0.217 0.244
Expression systems:
  • Escherichia coli BL21(DE3)
  • Not provided

Quick links

Citations

10 review citations

Cysteine cathepsin proteases as pharmacological targets in cancer.
Palermo et al. (2008)
9 more

13 mentions without citation

The calpains: modular designs and functional diversity.
Croall et al. (2007)
12 more