show all | hide all No of entries

Information on EC 1.14.99.63 - beta-carotene 4-ketolase

for references in articles please use BRENDA:EC1.14.99.63
Please wait a moment until all data is loaded. This message will disappear when all data is loaded.
EC Tree
IUBMB Comments
The enzyme, studied from algae, plants, fungi, and bacteria, adds an oxo group at position 4 of a carotenoid beta ring. It is involved in the biosynthesis of carotenoids such as astaxanthin and flexixanthin. The enzyme does not act on beta rings that are hydroxylated at position 3, such as in zeaxanthin (cf. EC 1.14.99.64, zeaxanthin 4-ketolase). The enzyme from the yeast Xanthophyllomyces dendrorhous is bifuntional and also catalyses the activity of EC 1.14.15.24, beta-carotene 3-hydroxylase.
Specify your search results
Select one or more organisms in this record: ?
Word Map
The expected taxonomic range for this enzyme is: Bacteria, Eukaryota
Synonyms
alr3189, beta-C-4 oxygenase;, beta-C-4-oxygenase, beta-carotene 3-hydroxylase/4-ketolase, beta-carotene 4,4'-oxygenase, beta-carotene ketolase, bkt, bkt1, BKT3, CrtO, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
beta-carotene + 2 reduced acceptor + 2 O2 = echinenone + 2 acceptor + 3 H2O
show the reaction diagram
(1)
-
-
-
echinenone + 2 reduced acceptor + 2 O2 = canthaxanthin + 2 acceptor + 3 H2O
show the reaction diagram
(2)
-
-
-
Select items on the left to see more content.