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triterpenoid/arabidopsis
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Pagina 1 a partire dal 35 risultati
Formation and exudation of non-volatile products of the arabidiol triterpenoid degradation pathway in Arabidopsis roots.
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Triterpenoids produced by plants play important roles in the protection against biotic stress. Roots of Arabidopsis thaliana produce different triterpenoids, which include the tricyclic triterpene diol, arabidiol. In a degradation reaction induced by infection with the oomycete pathogen, Pythium
Heterologous biosynthesis of triterpenoid dammarenediol-II in engineered Escherichia coli.
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OBJECTIVE
To achieve heterologous biosynthesis of dammarenediol-II, which is the precursor of dammarane-type tetracyclic ginsenosides, by reconstituting the 2,3-oxidosqualene-derived triterpenoid biosynthetic pathway in Escherichia coli.
RESULTS
By the strategy of synthetic biology, dammarenediol-II
Trinorlupeol: a major nonsterol triterpenoid in Arabidopsis.
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We report the structure determination of 20,29,30-trinorlup-18-en-3beta-ol (trinorlupeol) and establish this novel C 27 metabolite as a major nonsterol triterpenoid in Arabidopsis thaliana. Trinorlupeol was concentrated in cuticular waxes, notably in the plant stem, floral buds, and seedpods, but
Rapid induction of the triterpenoid pathway in Arabidopsis thaliana mesophyll protoplasts.
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UNASSIGNED
The purpose of this study was to determine if Arabidopsis protoplast transfection could be scaled up, from the commonly used cell-based studies, to be used in triterpenoid production assays as an in planta alternative/complement to other expression systems. Enzyme activities are often
Molecular characterization of the pentacyclic triterpenoid biosynthetic pathway in Catharanthus roseus.
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Catharanthus roseus is an important medicinal plant and the sole commercial source of monoterpenoid indole alkaloids (MIA), anticancer compounds. Recently, triterpenoids like ursolic acid and oleanolic acid have also been found in considerable amounts in C. roseus leaf cuticular wax layer. These
Triterpenoid-biosynthetic UDP-glycosyltransferases from plants.
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Triterpenoid saponins are naturally occurring structurally diverse glycosides of triterpenes that are widely distributed among plant species. Great interest has been expressed by pharmaceutical and agriculture industries for the glycosylation of triterpenes. Such modifications alter their taste and
Genome mining to identify new plant triterpenoids.
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Arabidopsis thaliana is a well-established model organism for plant genetics, and its recently sequenced genome reveals a wealth of enzymes similar to known examples that biosynthesize secondary metabolites. We describe experiments that exploit this genomic information to identify novel terpenoids.
Molecular cloning and expression in yeast of 2,3-oxidosqualene-triterpenoid cyclases from Arabidopsis thaliana.
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A vast array of triterpenes are found in living organisms in addition to lanosterol and cycloartenol, which are involved in sterol biosynthesis in non-photosynthetic and photosynthetic eukaryotes respectively. The chemical structure of these triterpenes is determined by a single step catalysed by
Cell-Free Production of Pentacyclic Triterpenoid Compound Betulinic Acid from Betulin by the Engineered Saccharomyces cerevisiae.
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Betulinic acid is a product of plant secondary metabolism which has shown various bioactivities. Several CYP716A subfamily genes were recently characterized encoding multifunctional oxidases capable of C-28 oxidation. CYP716A12 was identified as betulin C-28 oxidase, capable of modifying betulin.
Arabidopsis thaliana squalene epoxidase 1 is essential for root and seed development.
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Squalene epoxidase converts squalene into oxidosqualene, the precursor of all known angiosperm cyclic triterpenoids, which include membrane sterols, brassinosteroid phytohormones, and non-steroidal triterpenoids. In this work, we have identified six putative Arabidopsis squalene epoxidase (SQE)
UDP-glycosyltransferases from the UGT73C subfamily in Barbarea vulgaris catalyze sapogenin 3-O-glucosylation in saponin-mediated insect resistance.
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Triterpenoid saponins are bioactive metabolites that have evolved recurrently in plants, presumably for defense. Their biosynthesis is poorly understood, as is the relationship between bioactivity and structure. Barbarea vulgaris is the only crucifer known to produce saponins. Hederagenin and
Saponin determination, expression analysis and functional characterization of saponin biosynthetic genes in Chenopodium quinoa leaves.
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Quinoa (Chenopodium quinoa Willd.) is a highly nutritious pseudocereal with an outstanding protein, vitamin, mineral and nutraceutical content. The leaves, flowers and seed coat of quinoa contain triterpenoid saponins, which impart bitterness to the grain and make them unpalatable without
Overexpression of Panax ginseng sesquiterpene synthase gene confers tolerance against Pseudomonas syringae pv. tomato in Arabidopsis thaliana.
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Sesquiterpenes are an abundant group belonging to the terpenoid family, with a C15 structure comprise of three isoprene units. Many sesquiterpenes are volatile compounds and it act as chemical messenger in plant signalling, particularly in the defense mechanism against biotic and abiotic stresses.
Isotopologue profiling of triterpene formation under physiological conditions. Biosynthesis of lupeol-3-(3'-R-hydroxy)-stearate in Pentalinon andrieuxii.
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The biosynthesis of lupeol-3-(3'R-hydroxy)-stearate (procrim b, 1) was investigated in the Mexican medicinal plant Pentalinon andrieuxii by (13)CO2 pulse-chase experiments. NMR analyses revealed positional enrichments of (13)C2-isotopologues in both the triterpenoid and the hydroxystearate moieties
In silico analysis of squalene synthase in Fabaceae family using bioinformatics tools.
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Triterpenoid saponins are a diverse group of bioactive compounds, which are used for possessing of many biomedical and pharmaceutical products. Generally, squalene synthase (SQS) is defined as an emerging and essential branch point enzyme far from the major pathway of isoprenoids biosynthetic and a
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