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
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1.17.5.B2
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astaxanthin
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canthaxanthin
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zeaxanthin
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birds
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hydroxylase
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yellow
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cyanobacterium
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algal
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keto-carotenoids
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nostoc
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high-yield
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beta-carotene
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zofingiensis
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high-light
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ketolation
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chlorella
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punctiforme
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co-opted
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beak
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zebra
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lutein
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finch
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vision
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echinenone
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feather
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carotenogenic
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phytoene
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4-keto
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synechocystis
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integument
- 1.17.5.B2
- astaxanthin
- canthaxanthin
- zeaxanthin
-
birds
- hydroxylase
- yellow
- cyanobacterium
-
algal
-
keto-carotenoids
- nostoc
-
high-yield
- beta-carotene
- zofingiensis
-
high-light
-
ketolation
-
chlorella
- punctiforme
-
co-opted
-
beak
-
zebra
- lutein
- finch
-
vision
- echinenone
- feather
-
carotenogenic
- phytoene
-
4-keto
- synechocystis
-
integument
Reaction
Synonyms
carotenoid ketolase, CrtO, CrtO ketolase
ECTree
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General Information
General Information on EC 1.17.5.B2 - carotenoid ketolase (quinone)
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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
the CrtO reaction is fundamentally different to the CrtW ketolase reaction, EC 1.14.11.B16, which ketolates the same substrate to the same product in an oxygen-dependent dioxygenase reaction
additional information
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the CrtO reaction is fundamentally different to the CrtW ketolase reaction, EC 1.14.11.B16, which ketolates the same substrate to the same product in an oxygen-dependent dioxygenase reaction