1.3.99.39: carotenoid phi-ring synthase

This is an abbreviated version!
For detailed information about carotenoid phi-ring synthase, go to the full flat file.

Reaction

Synonyms

crtU, CT0323, gamma-carotene desaturase

ECTree

     1 Oxidoreductases

         1.3 Acting on the CH-CH group of donors

             1.3.99 With unknown physiological acceptors

                1.3.99.39 carotenoid phi-ring synthase

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4	AA Sequence
1	Application
1	Cloned(Commentary)
4	General Information
2	Natural Substrates/ Products (Substrates)
8	Organism
5	Pathway
1	Reaction
8	Reference
10	Substrates and Products (Substrate)
11	Synonyms
1	Systematic Name

Systematic Name

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Systematic Name on EC 1.3.99.39 - carotenoid phi-ring synthase

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SYSTEMATIC NAME

IUBMB Comments

carotenoid beta-ring:acceptor oxidoreductase/methyltranferase (phi-ring forming)

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.