Structure analysis

Crystal structure of the free (uncomplexed) Ecballium elaterium trypsin inhibitor (EETI-II)

X-ray diffraction
1.67Å resolution
Source organism: Ecballium elaterium
Assemblies composition:
homo hexamer (preferred)
monomeric
Entry contents: 1 distinct polypeptide molecule

Assemblies

Assembly 1 (preferred)
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Multimeric state: homo hexamer
Accessible surface area: 9450.85 Å2
Buried surface area: 6047.94 Å2
Dissociation area: 2,850.29 Å2
Dissociation energy (ΔGdiss): 37.16 kcal/mol
Dissociation entropy (TΔSdiss): 40.4 kcal/mol
Symmetry number: 6
PDBe Complex ID: PDB-CPX-146094
Assembly 2
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Multimeric state: monomeric
Accessible surface area: 2280.92 Å2
Buried surface area: 0.0 Å2
Dissociation area: 0 Å2
Dissociation energy (ΔGdiss): 0 kcal/mol
Dissociation entropy (TΔSdiss): 0 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-146093
Assembly 3
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Multimeric state: monomeric
Accessible surface area: 2293.69 Å2
Buried surface area: 0.0 Å2
Dissociation area: 0 Å2
Dissociation energy (ΔGdiss): 0 kcal/mol
Dissociation entropy (TΔSdiss): 0 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-146093

Macromolecules

Chains: A, B, C, D, E, F, G, H
Length: 31 amino acids
Theoretical weight: 3.14 KDa
Source organism: Ecballium elaterium
Expression system: Escherichia coli
UniProt:
  • Canonical: P12071 (Residues: 1-30; Coverage: 100%)
Pfam: Squash family serine protease inhibitor
InterPro:
SCOP: Plant inhibitors of proteinases and amylases

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