1n3u

X-ray diffraction
2.58Å resolution

Crystal structure of human heme oxygenase 1 (HO-1) in complex with its substrate heme, crystal form B

Released:

Function and Biology Details

Reaction catalysed:
Protoheme + 3 [reduced NADPH--hemoprotein reductase] + 3 O(2) = biliverdin + Fe(2+) + CO + 3 [oxidized NADPH--hemoprotein reductase] + 3 H(2)O
Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Macromolecule:
Heme oxygenase 1 soluble form Chains: A, B
Molecule details ›
Chains: A, B
Length: 233 amino acids
Theoretical weight: 26.9 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
UniProt:
  • Canonical: P09601 (Residues: 1-233; Coverage: 81%)
Gene names: HMOX1, HO, HO1
Sequence domains: Heme oxygenase
Structure domains: Heme oxygenase-like

Ligands and Environments


Cofactor: Ligand HEM 2 x HEM
1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RU200
Spacegroup: P21
Unit cell:
a: 54.395Å b: 55.92Å c: 79.379Å
α: 90° β: 101.2° γ: 90°
R-values:
R R work R free
0.227 0.225 0.265
Expression system: Escherichia coli