The enzyme, found in purple sulfur bacteria (Chromatiaceae) and some cyanobacteria, is involved in the biosynthesis of carotenoids that contain chi-type end groups, such as okenone, renierapurpurin, and synechoxanthin.
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The enzyme appears in viruses and cellular organisms
The enzyme, found in purple sulfur bacteria (Chromatiaceae) and some cyanobacteria, is involved in the biosynthesis of carotenoids that contain chi-type end groups, such as okenone, renierapurpurin, and synechoxanthin.
in Thiodictyon sp., lycopene cyclase CrtY produces gamma-carotene as the only product. gamma-Carotene desaturase methyltransferase CrtU produces carotenoids with chi-rings which are further transformed to final product okenone
a gene disruption mutant does not produce detectable synechoxanthin, but has otherwise essentially normal carotenoid contents. Growth rate under standard conditions is identical to wild-type
in Thiodictyon sp., lycopene cyclase CrtY produces gamma-carotene as the only product. gamma-Carotene desaturase methyltransferase CrtU produces carotenoids with chi-rings which are further transformed to final product okenone
The biosynthetic pathway for synechoxanthin, an aromatic carotenoid synthesized by the euryhaline, unicellular cyanobacterium Synechococcus sp. strain PCC 7002
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1.3.99.40 carotenoid chi-ring synthase
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