carotenoid beta-end group [CPD:C21915];
acceptor [CPD:C00028]
Product
carotenoid phi-end group [CPD:C21916];
reduced acceptor [CPD:C00030]
Comment
The enzyme, found in green sulfur bacteria, some cyanobacteria and some actinobacteria, introduces additional double bonds to the carotenoid beta-end group, leading to aromatization of the ionone ring. As a result, one of the methyl groups at C-1 is transferred to position C-2. It is involved in the biosynthesis of carotenoids with phi-type aromatic end groups such as chlorobactene, beta-isorenieratene, and isorenieratene.
Krugel H, Krubasik P, Weber K, Saluz HP, Sandmann G.
Title
Functional analysis of genes from Streptomyces griseus involved in the synthesis of isorenieratene, a carotenoid with aromatic end groups, revealed a novel type of carotenoid desaturase.
