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Information on EC 1.3.99.39 - carotenoid phi-ring synthase

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IUBMB Comments
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.
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The enzyme appears in viruses and cellular organisms
Synonyms
crtU, CT0323, gamma-carotene desaturase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
carotenoid beta-end group + 2 acceptor = carotenoid phi-end group + 2 reduced acceptor
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