› 3sgq

X-ray diffraction
1.8Å resolution

GLN 18 VARIANT OF TURKEY OVOMUCOID INHIBITOR THIRD DOMAIN COMPLEXED WITH STREPTOMYCES GRISEUS PROTEINASE B AT PH 10.7

Released:
DOI: 10.2210/pdb3sgq/pdb
PDB entry 3sgq coloured by chain, front view.
PDB entry 3sgq coloured by chain, side view.
PDB entry 3sgq coloured by chain, top view.
Source organisms:
Entry authors: Huang K, Lu W, Anderson S, Laskowski Jr M, James MNG

Function and Biology Details

Reaction catalysed: 
Hydrolysis of proteins with trypsin-like specificity.
Biochemical function:
Biological process:
Cellular component:
  • not assigned
Sequence domains:
Structure domains:

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-133489 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Streptogrisin-B Chain: E
Molecule details ›
Chain: E
Length: 185 amino acids
Theoretical weight: 18.65 KDa
Source organism: Streptomyces griseus
UniProt:
  • Canonical: P00777 (Residues: 115-299; Coverage: 71%)
Gene name: sprB
Sequence domains: Trypsin
Structure domains: Trypsin-like serine proteases
Ovomucoid Chain: I
Molecule details ›
Chain: I
Length: 51 amino acids
Theoretical weight: 5.6 KDa
Source organism: Meleagris gallopavo
Expression system: Escherichia coli
UniProt:
  • Canonical: P68390 (Residues: 135-185; Coverage: 28%)
Sequence domains: Kazal-type serine protease inhibitor domain
Structure domains: Wheat Germ Agglutinin (Isolectin 2); domain 1

Ligands and Environments

1 bound ligand:
Ligand PO4 1 x PO4
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RU200
Spacegroup: P21
Unit cell:
a: 45.35Å b: 54.65Å c: 45.62Å
α: 90° β: 119.2° γ: 90°
R-values:
R R work R free
0.175 0.175 not available
Expression system: Escherichia coli

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