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Literature summary for 1.14.15.24 extracted from

  • Tian, L.; DellaPenna, D.
    Progress in understanding the origin and functions of carotenoid hydroxylases in plants (2004), Arch. Biochem. Biophys., 430, 22-29.
    View publication on PubMed
Search for more literature for 1.14.15.24

Organism

Organism UniProt Comment Textmining
Arabidopsis thaliana Q9SZZ8
-
-

Source Tissue

Source Tissue Comment Organism Textmining
leaf
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 Arabidopsis thaliana
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Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
alpha-carotene + reduced acceptor + H+ + O2
-
 Arabidopsis thaliana zeinoxanthin + acceptor + H2O
-
 ?
beta-carotene + 2 reduced ferredoxin [iron-sulfur] cluster + H+ + O2
-
 Arabidopsis thaliana beta-cryptoxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O
-
 ?
beta-carotene + 4 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + 2 O2 overall reaction Arabidopsis thaliana zeaxanthin + 4 oxidized ferredoxin [iron-sulfur] cluster + 2 H2O zeaxanthin is beta,beta-carotene-3,3'-diol ?
beta-cryptoxanthin + 2 reduced ferredoxin [iron-sulfur] cluster + H+ + O2
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 Arabidopsis thaliana zeaxanthin + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O
-
 ?
additional information the beta-hydroxylase is weakly (6%) active towards epsilon-rings in comparison to beta-rings Arabidopsis thaliana ?
-
 ?

Synonyms

Synonyms Comment Organism
beta-hydroxylase (b1,b2)
-
 Arabidopsis thaliana

General Information

General Information Comment Organism
malfunction the homozygous b1/b2 double mutant does not show obvious growth defects and though beta-carotene-derived xanthophylls are reduced to 20% of wild type levels (much more than either b1 or b2 single mutant), the full complement of alpha- and beta-carotene-derived xanthophylls is still synthesized, albeit beta-carotene-derived xanthophylls are produced at lower levels in the double mutant Arabidopsis thaliana