1qkb

X-ray diffraction
1.8Å resolution

OLIGO-PEPTIDE BINDING PROTEIN (OPPA) COMPLEXED WITH KVK

Released:

Function and Biology Details

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Periplasmic oligopeptide-binding protein Chain: A
Molecule details ›
Chain: A
Length: 517 amino acids
Theoretical weight: 58.88 KDa
Source organism: Salmonella enterica subsp. enterica serovar Typhimurium
Expression system: Escherichia coli
UniProt:
  • Canonical: P06202 (Residues: 27-543; Coverage: 100%)
Gene names: STM1746, oppA
Sequence domains: Bacterial extracellular solute-binding proteins, family 5 Middle
Structure domains:
PEPTIDE LYS-VAL-LYS Chain: B
Molecule details ›
Chain: B
Length: 3 amino acids
Theoretical weight: 376 Da
Source organism: synthetic construct
Expression system: Not provided

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
Spacegroup: P212121
Unit cell:
a: 109.73Å b: 75.78Å c: 70.27Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.181 0.181 0.215
Expression systems:
  • Escherichia coli
  • Not provided