PDBe 2opo

X-ray diffraction
1.75Å resolution

Crystal structure of the calcium-binding pollen allergen Che a 3


Function and Biology Details

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

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Entry contents:
1 distinct polypeptide molecule
Polcalcin Che a 3 Chains: A, B, C, D
Molecule details ›
Chains: A, B, C, D
Length: 86 amino acids
Theoretical weight: 9.56 KDa
Source organism: Chenopodium album
Expression system: Escherichia coli BL21(DE3)
  • Canonical: Q84V36 (Residues: 1-86; Coverage: 100%)
Sequence domains: EF-hand domain pair
Structure domains: EF-hand

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE ID14-4
Spacegroup: P21212
Unit cell:
a: 72.24Å b: 73.874Å c: 68.939Å
α: 90° β: 90° γ: 90°
R R work R free
0.202 0.198 0.247
Expression system: Escherichia coli BL21(DE3)