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231224s2016 xx |||||o 00| ||eng c |
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|a 10.1111/nph.13796
|2 doi
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|a DE-627
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|a eng
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|a Polturak, Guy
|e verfasserin
|4 aut
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|a Elucidation of the first committed step in betalain biosynthesis enables the heterologous engineering of betalain pigments in plants
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|c 2016
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 13.12.2016
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|a Date Revised 13.12.2023
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|a published: Print-Electronic
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|a GENBANK: AB182643.1, AET43289.1, AET43291.1, AET43292.1, AGI78466.1, AKI33831.1, AKI33834.1, AKI33835.1, AKI33838.1, HQ656023.1, HQ656027.1, KT962274, KU041698
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|a CommentIn: New Phytol. 2016 Apr;210(1):6-9. - PMID 26919693
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|a Citation Status MEDLINE
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|a © 2015 The Authors. New Phytologist © 2015 New Phytologist Trust.
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|a Betalains are tyrosine-derived red-violet and yellow pigments, found in plants only of the Caryophyllales order. Although much progress has been made in recent years in the understanding of the betalain biosynthetic process, many questions remain open with regards to several of the proposed steps in the pathway. Most conspicuous by its absence is the characterization of the first committed step in the pathway, namely the 3-hydroxylation of tyrosine to form l-3,4-dihydroxyphenylalanine (l-DOPA). We used transcriptome analysis of the betalain-producing plants red beet (Beta vulgaris) and four o'clocks (Mirabilis jalapa) to identify a novel, betalain-related cytochrome P450-type gene, CYP76AD6, and carried out gene silencing and recombinant expression assays in Nicotiana benthamiana and yeast cells to examine its functionality. l-DOPA formation in red beet was found to be redundantly catalyzed by CYP76AD6 together with a known betalain-related enzyme, CYP76AD1, which was previously thought to only catalyze a succeeding step in the pathway. While CYP76AD1 catalyzes both l-DOPA formation and its subsequent conversion to cyclo-DOPA, CYP76AD6 uniquely exhibits only tyrosine hydroxylase activity. The new findings enabled us to metabolically engineer entirely red-pigmented tobacco plants through heterologous expression of three genes taking part in the fully decoded betalain biosynthetic pathway
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|a Journal Article
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|a Beta vulgaris
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|a betalains
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|a gene function
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|a pigments
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|a plant metabolic engineering
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|a secondary metabolism
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|a Betacyanins
|2 NLM
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|a Betaxanthins
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|a Recombinant Proteins
|2 NLM
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|a Betalains
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|a 37279-84-8
|2 NLM
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|a Dihydroxyphenylalanine
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|a 63-84-3
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|a Cytochrome P-450 Enzyme System
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|a 9035-51-2
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|a Breitel, Dario
|e verfasserin
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|a Grossman, Noam
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|a Sarrion-Perdigones, Alejandro
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|a Weithorn, Efrat
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|a Pliner, Margarita
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|a Orzaez, Diego
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|a Granell, Antonio
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|a Rogachev, Ilana
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|a Aharoni, Asaph
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|i Enthalten in
|t The New phytologist
|d 1979
|g 210(2016), 1 vom: 12. Apr., Seite 269-83
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|x 1469-8137
|7 nnns
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|g volume:210
|g year:2016
|g number:1
|g day:12
|g month:04
|g pages:269-83
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|u http://dx.doi.org/10.1111/nph.13796
|3 Volltext
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