Protein
Heme oxygenase 4, chloroplastic
Organism
Arabidopsis thaliana
Function
Catalyzes the opening of the heme ring to form the open-chain tetrapyrrole biliverdin IX with the release of iron and carbon monoxide (CO). Produces specifically the biliverdin IX-alpha isomer. Plays a minor role in phytochrome assembly and photomorphogenesis.
Similarity
Belongs to the heme oxygenase family.
Sequence
MATSRLNASCRFPASRRLDCESYVSLRAKTVTIRYVRTIAAPRRHLVRRANEDQTLVVNVVAAAGEKPERRYPREPNGFVEEMRFVVMKIHPRDQVKEGKSDSNDLVSTWNFTIEGYLKFLVDSKLVFETLERIINESAIQAYAGLKNTGLERAENLSRDLEWFKEQGYEIPESMVPGKAYSQYLKNIAEKDPPAFICHFYNINFAHSAGGRMIGTKVAEKILDNKELEFYKWDGQLSELLQNVSEELNKVAELWTREEKNHCLEETEKSFKFYWEIFRYLLS