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Results 1 - 10 of 10
EC Number
General Information
Commentary
Reference
malfunction
mis-expressing of CYP97C1 impacts carotenoids metabolic flux
malfunction
quadruple chy1chy2lut2lut5 mutant lacks lutein and shows a compensatory increase in beta-xanthophylls with respect to the chy1chy2lut5 mutant. Chy1chy2lut2lut5 mutant plants show an even stronger photosensitivity than mutant chy1chy2lut5, a complete lack of qE, the rapidly reversible component of non-photochemical quenching, and a peculiar organization of the pigment binding complexes into thylakoids. The chy1chy2lut2lut5 mutant is depleted in Lhcb subunits and is specifically affected in Photosystem I function, showing a deficiency in PSI-LHCI supercomplexes, phenotype, overview; quadruple chy1chy2lut2lut5 mutant lacks lutein and shows a compensatory increase in beta-xanthophylls with respect to the chy1chy2lut5 mutant. Chy1chy2lut2lut5 mutant plants show an even stronger photosensitivity than mutant chy1chy2lut5, a complete lack of qE, the rapidly reversible component of non-photochemical quenching, and a peculiar organization of the pigment binding complexes into thylakoids. The chy1chy2lut2lut5 mutant is depleted in Lhcb subunits and is specifically affected in Photosystem I function, showing a deficiency in PSI-LHCI supercomplexes, phenotype, overview
metabolism
the enzyme is involved in the biosynthetic pathway of lutein in plants, overview
metabolism
the enzyme is involved in the carotenoid biosynthesis pathway
metabolism
the enzyme is involved in the carotenoid biosynthesis pathway, for which 7 crucial genes are responsible, overview
metabolism
the first step in xanthophyll biosynthesis from alpha- and beta-carotene is the hydroxylation of epsilon- and beta-rings, performed by both non-heme iron oxygenases CHY1 and CHY2, and by P450 cytochromes, LUT1/CYP97C1 and LUT5/CYP97A3. CHY1, CHY2, LUT1/CYP97C1 and LUT5/CYP97A3 are the complete complement of carotene hydroxylases in Arabidopsis thaliana; the first step in xanthophyll biosynthesis from alpha- and beta-carotene is the hydroxylation of epsilon- and beta-rings, performed by both non-heme iron oxygenases CHY1 and CHY2, and by P450 cytochromes, LUT1/CYP97C1 and LUT5/CYP97A3. CHY1, CHY2, LUT1/CYP97C1 and LUT5/CYP97A3 are the complete complement of carotene hydroxylases in Arabidopsis thaliana
physiological function
alpha-carotene and beta-carotene turns into lutein and zeaxanthin, respectively, by the hydroxylation process, in the presence of epsilon-ring carotene hydroxylase and beta-ring carotene hydroxylase
physiological function
of the four citrus carotene hydroxylases presented in four distinct clusters, CitCYP97C is the one responsible for epsilon-ring hydroxylation in Citrus unshiu, while CitCYP97A and CitCYP97B hydroxylate the alpha- and beta-rings of alpha-carotene, respectively, roles of four carotene hydroxylase genes (CitHYb, CitCYP97A, CitCYP97B, and CitCYP97C) in regulating xanthophylls biosynthesis. Zeaxanthin increases significantly during the ripening process in Citrus fruits, contents of alpha-carotene and lutein increase gradually in the juice sacs during the ripening process, the content of beta-cryptoxanthin, the major carotenoid in Satsuma mandarin, increases significantly during the ripening process in December, overview
physiological function
the enzyme is involved in xanthophyll biosynthesis, correlation between xanthophyll levels and the PSI-PSII ratio, xanthophylls are needed for normal level of Photosystem I and LHCII accumulation; the enzyme is involved in xanthophyll biosynthesis, correlation between xanthophyll levels and the PSI-PSII ratio, xanthophylls are needed for normal level of Photosystem I and LHCII accumulation
physiological function
the overexpression of gene LeLUT1 has a key function in alleviating photoinhibition and photooxidation, and decreases the sensitivity of photosynthesis to chilling stress
Results 1 - 10 of 10