Protein
Heme oxygenase (staphylobilin-producing)
Organism
Staphylococcus saprophyticus subsp. saprophyticus (strain ATCC 15305 / DSM 20229 / NCIMB 8711 / NCTC 7292 / S-41)
Function
Allows bacterial pathogens to use the host heme as an iron source. Catalyzes the oxidative degradation of the heme macrocyclic porphyrin ring to the oxo-bilirubin chromophore staphylobilin (a mixture of the linear tetrapyrroles 5-oxo-delta-bilirubin and 15-oxo-beta-bilirubin) in the presence of a suitable electron donor such as ascorbate or NADPH--cytochrome P450 reductase, with subsequent release of free iron.
Similarity
Belongs to the antibiotic biosynthesis monooxygenase family. Heme-degrading monooxygenase IsdG subfamily.
Sequence
MYVVTNRIDVKKGFAEKMAPKFTQGGKIQELEGFQKVEVWLIDDEADYDQMYINTWWDSEDDFKGWLKSDAFKEAHEGKSKTKSDDSPILGNKVVKANVISELS