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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)

Substrates Products

Substrates Products on EC 1.17.5.B2 - carotenoid ketolase (quinone)

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SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
4,4'-dihydroxy-beta-carotene + benzoquinone
canthaxanthin + benzoquinol
show the reaction diagram
via 4-hydroxy-4'-oxo-beta-carotene
-
-
?
beta-carotene + benzoquinone + H2O
echinenone + benzoquinol + 2 H+
show the reaction diagram
-
-
-
?
additional information
?
-