› 7cbk

X-ray diffraction
2.7Å resolution

Structure of Human Neutrophil Elastase Ecotin complex

Released:
DOI: 10.2210/pdb7cbk/pdb
PDB entry 7cbk coloured by chain, front view.
PDB entry 7cbk coloured by chain, side view.
PDB entry 7cbk coloured by chain, top view.
Source organisms:
Primary publication:
Structural Basis for the Inhibition Mechanism of Ecotin against Neutrophil Elastase by Targeting the Active Site and Secondary Binding Site.
Jobichen C, Prabhakar MT, Loh SN, Sivaraman J
Biochemistry 59 2788-2795 (2020)
PMID: 32657577

Function and Biology Details

Reaction catalysed: 
Hydrolysis of proteins, including elastin. Preferential cleavage Val-|- > Ala-|-.
Biochemical function:
Biological process:
Cellular component:
  • not assigned
Sequence domains:

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-140070 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (3 distinct):
Ecotin Chains: A, C
Molecule details ›
Chains: A, C
Length: 162 amino acids
Theoretical weight: 18.21 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli 'BL21-Gold(DE3)pLysS AG'
UniProt:
  • Canonical: P23827 (Residues: 1-162; Coverage: 100%)
Gene names: JW2197, b2209, eco, eti
Sequence domains: Ecotin
Neutrophil elastase Chains: B, D
Molecule details ›
Chains: B, D
Length: 267 amino acids
Theoretical weight: 28.55 KDa
Source organism: Homo sapiens
UniProt:
  • Canonical: P08246 (Residues: 1-267; Coverage: 100%)
Gene names: ELA2, ELANE
Sequence domains: Trypsin

Ligands and Environments

Carbohydrate polymer : NEW Components: NAG, FUC
Carbohydrate polymer
4 bound ligands:
Ligand GOL 1 x GOL
Ligand SO4 2 x SO4
Ligand MG 1 x MG
Ligand NAG 1 x NAG
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU MICROMAX-007 HF
Spacegroup: P21
Unit cell:
a: 43.192Å b: 165.102Å c: 63.998Å
α: 90° β: 108.75° γ: 90°
R-values:
R R work R free
0.205 0.199 0.266
Expression system: Escherichia coli 'BL21-Gold(DE3)pLysS AG'

Quick links

Citations

1 citations in other articles

The bacterial serine protease inhibitor ecotin inhibits neutrophil elastase enzymatic activity in cystic fibrosis sputa.
Fantone et al. (2024)

2 mentions without citation

Position-specific N- and O-glycosylation of the reactive center loop impacts neutrophil elastase-mediated proteolysis of corticosteroid-binding globulin.
Chernykh et al. (2024)
1 more