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1.3.99.39: carotenoid phi-ring synthase

This is an abbreviated version!
For detailed information about carotenoid phi-ring synthase, go to the full flat file.

Reaction

carotenoid beta-end group
+ 2 acceptor =
carotenoid phi-end group
 + 2 reduced acceptor

Synonyms

crtU, CT0323, gamma-carotene desaturase

ECTree

     1 Oxidoreductases
         1.3 Acting on the CH-CH group of donors
             1.3.99 With unknown physiological acceptors
                1.3.99.39 carotenoid phi-ring synthase

Substrates Products

Substrates Products on EC 1.3.99.39 - carotenoid phi-ring synthase

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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
beta-carotene + 2 acceptor
beta-isorenieratene + 2 reduced acceptor
show the reaction diagram
-
-
-
-
?
beta-carotene + 2 acceptor
isoneriatene + 2 reduced acceptor
show the reaction diagram
beta-isorenieratene + 2 acceptor
isorenieratene + 2 reduced acceptor
show the reaction diagram
-
-
-
-
?
gamma-carotene + 2 acceptor
chlorobactene + 2 reduced acceptor
show the reaction diagram
additional information
?
-
-
enzyme is responsible for the conversion of beta-carotene via beta-isorenieratene to isorenieratene by a desaturation/methyltransferation mechanism. Upon introduction of two additional double bonds leading to amortization of the ionone ring, one of the methyl groups of C-1 (and also 1' at the other side) is lost and transferred to position 2
-
-
?