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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

Cloned

Cloned on EC 1.14.99.64 - zeaxanthin 4-ketolase

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CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
expression in Escherichia coli
transgenic Arabidopsis thaliana expressing the beta-carotene ketolase from Chlamydomonas reinhardtii develop orange leaves which accumulate astaxanthin up to 2 mg/g dry weight with a 1.8fold increase in total carotenoids. The ketolases with high activity of converting zeaxanthin to astaxanthin triggers transgenic Arabidopsis to accumulate large amounts of astaxanthin in leaves and seeds