Organism
Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576)
Function
Catalyzes the opening of the heme ring with the release of iron. Key enzyme in the synthesis of the chromophoric part of the photosynthetic antennae (By similarity). Upon overexpression in E.coli with PCB:ferredoxin oxidoreductase, CpeS and either CpcB or PecB permits synthesis of phycocyanin-coupled CpcB or PecB.
Similarity
Belongs to the heme oxygenase family.
Sequence
MSSNLANKLRVGTKKAHTMAENVGFVKCFLKGVVEKSSYRKLVANFYYVYSAMEEEMEKHSQHPIVSKINFSQLNRKQTLEQDLSYYYGANWREQIQLSPAGEAYVQRIREISATEPELLIAHSYTRYLGDLSGGQILKNIAVTAMNLNDGQGTAFYEFADISDEKAFKAKYRQTLDELAIDEATGDRIVDEANAAFGMNMKMFQELEGNLIKAIGMMLFNTLTRKRTRGATELATAE