› 6eat

X-ray diffraction
1.15Å resolution

Crystallographic structure of the cyclic nonapeptide derived from the BTCI inhibitor bound to beta-trypsin in space group P 21 21 21.

Released:
DOI: 10.2210/pdb6eat/pdb
PDB entry 6eat coloured by chain, front view.
PDB entry 6eat coloured by chain, side view.
PDB entry 6eat coloured by chain, top view.
Source organisms:
Primary publication:
Crystallographic structure of a complex between trypsin and a nonapeptide derived from a Bowman-Birk inhibitor found in Vigna unguiculata seeds.
Fernandes JPC, Mehdad A, Valadares NF, Mourão CBF, Ventura MM, Barbosa JARG, Freitas SM
Arch Biochem Biophys 665 79-86 (2019)
PMID: 30817908

Function and Biology Details

Reaction catalysed: 
Preferential cleavage: Arg-|-, Lys-|-.
Biochemical function:
Biological process:
Cellular component:
Sequence domains:

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-133359 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Serine protease 1 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%)
Gene names: PRSS1, TRP1, TRY1, TRYP1
Sequence domains: Trypsin
Structure domains: Trypsin-like serine proteases
Horsegram germinated inhibitor 3 Chain: I
Molecule details ›
Chain: I
Length: 9 amino acids
Theoretical weight: 977 Da
Source organism: Vigna unguiculata
Expression system: Not provided
UniProt:
  • Canonical: Q9S9E3 (Residues: 22-30; Coverage: 12%)
Sequence domains: Bowman-Birk serine protease inhibitor family

Ligands and Environments

2 bound ligands:
Ligand CA 1 x CA
Ligand SO4 12 x SO4
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: LNLS BEAMLINE W01B-MX2
Spacegroup: P212121
Unit cell:
a: 59.834Å b: 61.569Å c: 67.03Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.144 0.144 0.154
Expression system: Not provided

Quick links

Citations

1 citations in other articles

Enzymatic Pea Protein Hydrolysates Are Active Trypsin and Chymotrypsin Inhibitors.
Awosika et al. (2019)

1 mention without citation

Blood pressure-lowering effects of a Bowman-Birk inhibitor and its derived peptides in normotensive and hypertensive rats.
de Freitas et al. (2020)