Function and Biology

Rat Heme Oxygenase-1 in complex with Heme and CO at 100K

EC 1.14.14.18: Heme oxygenase (biliverdin-producing)

Reaction catalysed:
Protoheme + 3 [reduced NADPH--hemoprotein reductase] + 3 O(2) = biliverdin + Fe(2+) + CO + 3 [oxidized NADPH--hemoprotein reductase] + 3 H(2)O
Systematic name:
Protoheme,hydrogen-donor:oxygen oxidoreductase (alpha-methene-oxidizing, hydroxylating)
Alternative Name(s):
  • Heme oxidase
  • Heme oxidase
  • Heme oxygenase
  • Heme oxygenase
  • Heme oxygenase (decyclizing)
  • Heme,hydrogen-donor:oxygen oxidoreductase (alpha-methene-oxidizing, hydroxylating)
  • ORP33 proteins

GO terms

Biochemical function:
Biological process:
Cellular component:

Sequence family

Pfam Protein family (Pfam)
PF01126
Domain description: Heme oxygenase
Occurring in:
  1. Heme oxygenase 1
The deposited structure of PDB entry 4g98 contains 1 copy of Pfam domain PF01126 (Heme oxygenase) in Heme oxygenase 1. Showing 1 copy in chain A.

InterPro InterPro annotations
IPR002051
Domain description: Haem oxygenase
Occurring in:
  1. Heme oxygenase 1
IPR016084
Domain description: Haem oxygenase-like, multi-helical
Occurring in:
  1. Heme oxygenase 1
IPR018207
Domain description: Haem oxygenase conserved site
Occurring in:
  1. Heme oxygenase 1
IPR016053
Domain description: Haem oxygenase-like
Occurring in:
  1. Heme oxygenase 1

Structure domain

CATH CATH domain
1.20.910.10
Class: Mainly Alpha
Architecture: Up-down Bundle
Topology: Heme Oxygenase; Chain A
Homology: Heme oxygenase-like
Occurring in:
  1. Heme oxygenase 1
The deposited structure of PDB entry 4g98 contains 1 copy of CATH domain 1.20.910.10 (Heme Oxygenase; Chain A) in Heme oxygenase 1. Showing 1 copy in chain A.