X-ray diffraction
0.96Å resolution

Full Matrix Error Analysis of Streptavidin

Source organism: Streptomyces avidinii
Entry authors: Merritt EA, Le Trong I

Function and Biology Details

Biochemical function:
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
homo tetramer (preferred)
Entry contents:
1 distinct polypeptide molecule
Streptavidin Chains: A, B
Molecule details ›
Chains: A, B
Length: 127 amino acids
Theoretical weight: 13.27 KDa
Source organism: Streptomyces avidinii
Expression system: Escherichia coli
  • Canonical: P22629 (Residues: 37-163; Coverage: 80%)
Sequence domains: Avidin family
Structure domains: Avidin-like

Ligands and Environments

3 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL9-1
Spacegroup: I222
Unit cell:
a: 46.027Å b: 93.54Å c: 104.17Å
α: 90° β: 90° γ: 90°
R R work R free
0.139 0.139 0.164
Expression system: Escherichia coli