1.3.99.27: 1-hydroxycarotenoid 3,4-desaturase
This is an abbreviated version!
For detailed information about 1-hydroxycarotenoid 3,4-desaturase, go to the full flat file.
Reaction
Synonyms
1-HO carotenoid 3,4-dehydrogenase, 1-hydroxy monocyclic carotenoid 3,4-dehydrogenase, acyclic carotenoid 3,4-desaturase, CrtD, DDD_2394, hydroxyneurosporene desaturase, P99-3 CrtD
ECTree
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Cofactor
Cofactor on EC 1.3.99.27 - 1-hydroxycarotenoid 3,4-desaturase
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FAD
the FAD-binding site is located at the G-x-G-x-x-G nucleotide-binding motif, comprising residues Gly8-Ala9-Gly10-Ile11-Gly12-Gly13
additional information
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NAD+, NADP+, and flavin adenine dinucleotide have no influence on enzymatic activity. When O2 is depleted less than 10% of the specific activity is retained. It is rather unlikely that molecular oxygen is the genuine cofactor for hydroxyneurosporene desaturation reactions in Rhodobacter cells when they reach their maximum carotenoid content under anaerobic conditions. Consequently, another, as-yet-unknown electron acceptor may exist in Rhodobacter species that replaces molecular oxygen during anaerobic growth
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