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Simultaneous expression of Arabidopsis ρ-hydroxyphenylpyruvate dioxygenase and MPBQ methyltransferase in transgenic corn kernels triples the tocopherol content
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Simultaneous expression of Arabidopsis ρ-hydroxyphenylpyruvate dioxygenase and MPBQ methyltransferase in transgenic corn kernels triples the tocopherol content
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Simultaneous expression of Arabidopsis ρ-hydroxyphenylpyruvate dioxygenase and MPBQ methyltransferase in transgenic corn kernels triples the tocopherol content
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Journal Article
Simultaneous expression of Arabidopsis ρ-hydroxyphenylpyruvate dioxygenase and MPBQ methyltransferase in transgenic corn kernels triples the tocopherol content
2011
Overview
The quantity and composition of tocopherols (compounds with vitamin E activity) vary widely among different plant species reflecting the expression, activity and substrate specificity of enzymes in the corresponding metabolic pathway. Two Arabidopsis cDNA clones corresponding to q-hydroxyphenylpyruvate dioxygenase (HPPD) and 2-methyl-6-phytylplastoquinol methyltransferase (MPBQ MT) were constitutively expressed in corn to further characterize the pathway and increase the kernel tocopherol content. Transgenic kernels contained up to 3 times as much c-tocopherol as their wild type counterparts whereas other tocopherol isomers remained undetectable. Biofortification by metabolic engineering offers a sustainable alternative to vitamin E supplementation for the improvement of human health.
Publisher
Springer Verlag,Dordrecht : Springer Netherlands,Springer Netherlands,Springer
Subject
4-Hydroxyphenylpyruvate Dioxygenase - genetics
/ 4-Hydroxyphenylpyruvate Dioxygenase - metabolism
/ Animal Genetics and Genomics
/ Biological and medical sciences
/ Biomedical and Life Sciences
/ Biomedical Engineering/Biotechnology
/ clones
/ corn
/ Fundamental and applied biological sciences. Psychology
/ gamma-Tocopherol - metabolism
/ Gene Expression Regulation, Plant
/ Genetic Engineering - methods
/ Humans
/ isomers
/ Methods. Procedures. Technologies
/ Methyltransferases - genetics
/ Methyltransferases - metabolism
/ Plants, Genetically Modified - enzymology
/ Plants, Genetically Modified - genetics
/ seeds
