| 英文名 |
1-hydroxycarotenoid 3,4-desaturase |
| Example Structure |
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| 别名 |
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 |
| EC Number |
1.3.99.27 |
| CAS编号 |
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| Comments |
The enzymes from Rubrivivax gelatinosus and Rhodobacter sphaeroides prefer the acyclic carotenoids (e.g. 1-hydroxy-1,2-dihydroneurosporene, 1-hydroxy-1,2-dihydrolycopene) as substrates. The conversion rate for the 3,4-desaturation of the monocyclic 1′-hydroxy-1′,2′-dihydro-¦Ã-carotene is lower [2,3]. The enzyme from the marine bacterium strain P99-3 shows high activity with the monocyclic carotenoid 1′-hydroxy-1′,2′-dihydro-¦Ã-carotene [1]. The enzyme from Rhodobacter sphaeroides utilizes molecular oxygen as the electron acceptor in vitro [3]. However, oxygen is unlikely to be the natural electron acceptor under anaerobic conditions. |
| Cofactor |
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| History |
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| Reactions |
1-hydroxy-1,2-dihydrolycopene + acceptor = 1-hydroxy-3,4-didehydro-1,2- dihydrolycopene + reduced acceptor. |
