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1.14.15.24: beta-carotene 3-hydroxylase

This is an abbreviated version!
For detailed information about beta-carotene 3-hydroxylase, go to the full flat file.

Word Map on EC 1.14.15.24

Reaction

beta-carotene
+ 2 reduced ferredoxin [iron-sulfur] cluster +
H+
 +
O2
=
beta-cryptoxanthin
 + 2 oxidized ferredoxin [iron-sulfur] cluster +
H2O

Synonyms

AtB1, AtB2, BCH, BCH-type carotene hydroxylase, BCH1, BCH2, beta-carotene (beta,beta-carotene) 3-hydrocylase, beta-carotene 3,3'-hydroxylase, beta-carotene 3-hydroxylase, beta-carotene hydroxylase, beta-carotene hydroxylase 2, beta-carotene oxygenase, beta-hydroxylase, beta-hydroxylase (b1,b2), beta-hydroxylases 1, beta-hydroxylases 2, beta-ring 3(3')-hydroxylase, betaOHase, Bhy, carotene beta hydroxylase 2, carotene ring hydroxylase, carotenoid (beta-ionone ring) 3,3'-hydroxylase, carotenoid 3,(3')-beta-ionone ring hydroxylase, carotenoid 3,3'-hydroxylase, carotenoid beta-ring hydroxylase, carotenoid hydroxylase, carotenoid hydroxylase 2, Chx, CHX1, CHX2, Chy, CHY-beta, CHY1, CHY1/2, CHY2, Chyb, CrtH1, CrtR-B, CrtR-b2, crtRB1, crtS, CrtZ, CrtZ-2, CYP175A1, CYP97A, CYP97a3, CYP97A4, CYP97C1, DSM2, EC 1.14.13.129, HYD, L-carotene hydroxylase, LUT1, LUT5

ECTree

     1 Oxidoreductases
         1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
             1.14.15 With reduced iron-sulfur protein as one donor, and incorporation of one atom of oxygen into the other donor
                1.14.15.24 beta-carotene 3-hydroxylase

Expression

Expression on EC 1.14.15.24 - beta-carotene 3-hydroxylase

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EXPRESSION
ORGANISM
UNIPROT
LITERATURE
enzyme down-regulation increases beta-carotene contents (38fold) and total carotenoids in transgenic plant cells and enhances their antioxidant capacity
high-light intensity leads to a transient increase in carotenoid hydroxylase mRNA level. Addition of sodium acetate and ferrous sulfate and increasing the light intensity results in a strong increase in steady-state mRNA level of the carotenoid hydroxylase after 8 h with the highest transcript level of carotenoid hydroxylase at 24 to 48 h
in the presence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea, the light induction of carotenoid hydroxylase is abolished
the addition of compounds inducing reactive oxygen species like methyl viologen does not influence transcript levels of carotenoid hydroxylase. No transcript for carotenoid hydroxylase is detected after growth for 4 days under a dark/light cycle and low-light conditions
the CHX1 gene is not regulated during fruit ripening at the transcriptional level
the CHX2 gene is not regulated during fruit ripening at the transcriptional level
the DSM2 transcript level is induced (7-9fold) by drought and salt treatments and slightly induced by abscisic acid
-
the DSM2 transcript level is slightly suppressed by cold stress
-
there are increased L-carotene hydroxylase mRNA steady state levels after induction of astaxanthin biosynthesis
transcript levels of the beta-carotene hydroxylase gene bhy are increased to 182% during flower development