PDBe 1eyq

X-ray diffraction
1.85Å resolution

Chalcone isomerase and naringenin

Source organism: Medicago sativa
Primary publication:
Structure and mechanism of the evolutionarily unique plant enzyme chalcone isomerase.
Nat. Struct. Biol. 7 786-91 (2000)
PMID: 10966651

Function and Biology Details

Reaction catalysed:
A chalcone = a flavanone. 
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assemblies composition:
monomeric (preferred)
homo tetramer
homo dimer
Entry contents:
1 distinct polypeptide molecule
Chalcone--flavonone isomerase 1 Chains: A, B
Molecule details ›
Chains: A, B
Length: 222 amino acids
Theoretical weight: 23.85 KDa
Source organism: Medicago sativa
Expression system: Escherichia coli
  • Canonical: P28012 (Residues: 1-222; Coverage: 100%)
Gene names: CHI-1, CHI1
Sequence domains: Chalcone-flavanone isomerase
Structure domains:

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: SSRL BEAMLINE BL9-2
Spacegroup: P6522
Unit cell:
a: 88.624Å b: 88.624Å c: 350.369Å
α: 90° β: 90° γ: 120°
R R work R free
0.237 0.237 0.262
Expression system: Escherichia coli