[Term] id: PR:000025879 name: siroheme synthase def: "A protein that is a multifunctional enzyme of the siroheme and cobalamin (vitamin B12) biosynthesis pathways, represents a fusion between uroporphyrin-III C-methyltransferase (SUMT) and precorrin-2 oxidase/chelatase. It contains a Sirohaem synthase dimerisation region (Pfam:PF10414) followed by the Tetrapyrrole (Corrin/Porphyrin) Methylases (Pfam:PF00590) domain." [PIRSF:PIRSF036426] comment: Category=family. xref: PIRSF:PIRSF036426 is_a: PR:000000001 ! protein