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1.14.99.64: zeaxanthin 4-ketolase

This is an abbreviated version!
For detailed information about zeaxanthin 4-ketolase, go to the full flat file.

Reaction

adonixanthin
+ 2 reduced acceptor + 2 O2 =
(3S,3'S)-astaxanthin
+ 2 acceptor + 3 H2O

Synonyms

beta-carotene/zeaxanthin ketolase, bkt, CrtW148

ECTree

     1 Oxidoreductases
         1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
             1.14.99 Miscellaneous
                1.14.99.64 zeaxanthin 4-ketolase

Systematic Name

Systematic Name on EC 1.14.99.64 - zeaxanthin 4-ketolase

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SYSTEMATIC NAME
IUBMB Comments
zeaxanthin,donor:oxygen oxidoreductase (adonixanthin-forming)
The enzyme has a similar activity to that of EC 1.14.99.63, beta-carotene 4-ketolase, but unlike that enzyme is able to also act on zeaxanthin.