PDBe 1p2i

X-ray diffraction
1.65Å resolution

Structural consequences of accommodation of four non-cognate amino-acid residues in the S1 pocket of bovine trypsin and chymotrypsin

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Cationic trypsin Chain: A
Molecule details ›
Chain: A
Length: 223 amino acids
Theoretical weight: 23.32 KDa
Source organism: Bos taurus
UniProt:
  • Canonical: P00760 (Residues: 24-246; Coverage: 97%)
Sequence domains: Trypsin
Structure domains: Trypsin-like serine proteases
Pancreatic trypsin inhibitor Chain: I
Molecule details ›
Chain: I
Length: 58 amino acids
Theoretical weight: 6.44 KDa
Source organism: Bos taurus
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P00974 (Residues: 36-93; Coverage: 73%)
Sequence domains: Kunitz/Bovine pancreatic trypsin inhibitor domain
Structure domains: Pancreatic trypsin inhibitor Kunitz domain

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE BM1A
Spacegroup: I222
Unit cell:
a: 74.7Å b: 81Å c: 124.09Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.201 0.201 0.21
Expression system: Escherichia coli BL21(DE3)