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THE CRYSTAL STRUCTURE OF ANIONIC SALMON TRYPSIN IN COMPLEX WITH BOVINE PANCREATIC TRYPSIN INHIBITOR

X-ray diffraction
2.1Å resolution
PDB entry 1bzx coloured by chain, front view.
PDB entry 1bzx coloured by chain, side view.
PDB entry 1bzx coloured by chain, top view.
Source organisms:
Assembly composition:
hetero dimer (preferred)
Entry contents: 2 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Pancreatic trypsin inhibitor and Trypsin-1
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Multimeric state: hetero dimer
Accessible surface area: 12263.56 Å2
Buried surface area: 1411.24 Å2
Dissociation area: 662.79 Å2
Dissociation energy (ΔGdiss): 2.03 kcal/mol
Dissociation entropy (TΔSdiss): 10.45 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-133756

Macromolecules

Trypsin-1
Chain: E
Length: 222 amino acids
Theoretical weight: 23.86 KDa
Source organism: Salmo salar
UniProt:
  • Canonical: P35031 (Residues: 21-242; Coverage: 98%)
Pfam: Trypsin
InterPro:
CATH: Trypsin-like serine proteases
SCOP: Eukaryotic proteases
Trypsin-1 in PDB entry 1bzx, assembly 1, front view.
Trypsin-1 in PDB entry 1bzx, assembly 1, side view.
Trypsin-1 in PDB entry 1bzx, assembly 1, top view.
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Pancreatic trypsin inhibitor
Chain: I
Length: 58 amino acids
Theoretical weight: 6.53 KDa
Source organism: Bos taurus
UniProt:
  • Canonical: P00974 (Residues: 36-93; Coverage: 73%)
Pfam: Kunitz/Bovine pancreatic trypsin inhibitor domain
InterPro:
CATH: Pancreatic trypsin inhibitor Kunitz domain
SCOP: Small Kunitz-type inhibitors & BPTI-like toxins
Pancreatic trypsin inhibitor in PDB entry 1bzx, assembly 1, front view.
Pancreatic trypsin inhibitor in PDB entry 1bzx, assembly 1, side view.
Pancreatic trypsin inhibitor in PDB entry 1bzx, assembly 1, top view.
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