carotenoid chi-ring synthase

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


carotenoid beta-end group
+ 2 acceptor =
carotenoid chi-end group
+ 2 reduced acceptor


crtU, cruE


     1 Oxidoreductases
         1.3 Acting on the CH-CH group of donors
             1.3.99 With unknown physiological acceptors
       carotenoid chi-ring synthase

Systematic Name

Systematic Name on EC - carotenoid chi-ring synthase

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IUBMB Comments
carotenoid beta-ring:acceptor oxidoreductase/methyltranferase (chi-ring forming)
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.