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1.17.5.B2: carotenoid ketolase (quinone)

This is an abbreviated version!
For detailed information about carotenoid ketolase (quinone), go to the full flat file.

Word Map on EC 1.17.5.B2

Reaction

beta-carotene
+
benzoquinone
+
H2O
=
echinenone
+
benzoquinol
+ 2 H+

Synonyms

carotenoid ketolase, CrtO, CrtO ketolase

ECTree

     1 Oxidoreductases
         1.17 Acting on CH or CH2 groups
             1.17.5 With a quinone or similar compound as acceptor
                1.17.5.B2 carotenoid ketolase (quinone)

General Information

General Information on EC 1.17.5.B2 - carotenoid ketolase (quinone)

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GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
evolution
CrtO belongs to the CrtI family which comprises carotene desaturases and carotenoid oxidases. Phylogenetic tree of beta-carotene 4-ketolase CrtO and other enzymes related to bacterial phytoene desaturases CrtI including CrtN (4,4'-diapophytoene desaturase), CrtNb (4,4'-diapolycopene oxidase) and CrtNc (4,4'-diapolycopene-4,40-dial oxidase), overview
metabolism
CrtW and CrtO are two distinct non-homologous beta-carotene ketolases catalyzing the formation of echinenone and canthaxanthin
additional information