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secologanin/barwinek różowy

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The iridoid glucoside secologanin is derived from the novel triose phosphate/pyruvate pathway in a Catharanthus roseus cell culture.

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Secologanin is the iridoid building block of the majority of the terpenoid indole alkaloids. In the biosynthesis of secologanin, mevalonate was considered to be the exclusive precursor of isopentenyl diphosphate. After [1-(13)C]glucose feeding to a cell culture of Catharanthus roseus, its
BACKGROUND Transcriptome sequencing offers a great resource for the study of non-model plants such as Catharanthus roseus, which produces valuable monoterpenoid indole alkaloids (MIAs) via a complex biosynthetic pathway whose characterization is still undergoing. Transcriptome databases dedicated to

Inter-organ transport of secologanin allows assembly of monoterpenoid indole alkaloids in a Catharanthus roseus mutant.

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The medicinal value of the monoterpenoid indole alkaloids (MIAs) such as 3',4'-anhydrovinblastine, as well as their chemical complexity have stimulated extensive efforts to understand the biochemical and molecular pathways involved in their biosynthesis in plants such as Catharanthus roseus,

A 7-deoxyloganetic acid glucosyltransferase contributes a key step in secologanin biosynthesis in Madagascar periwinkle.

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Iridoids form a broad and versatile class of biologically active molecules found in thousands of plant species. In addition to the many hundreds of iridoids occurring in plants, some iridoids, such as secologanin, serve as key building blocks in the biosynthesis of thousands of monoterpene indole

Purification and properties of strictosidine synthetase (an enzyme condensing tryptamine and secologanin) from Catharanthus roseus cultured cells.

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Strictosidine synthetase, which catalyzes the condensation of tryptamine with secologanin to form strictosidine (isovincoside), was purified 740-fold to homogeneity from cultured cells of Catharanthus roseus in 10% yield. The specific activity is 5.85 nkat/mg. The molecular weight as estimated by
A transgenic cell suspension culture of Nicotiana tabacum L. `Petit Havana' SR1 was established expressing tryptophan decarboxylase and strictosidine synthase cDNA clones from Catharanthus roseus (L.) G. Don under the direction of cauliflower mosaic virus 35S promoter and nopaline synthase

Indole alkaloid biosynthesis in Catharanthus roseus: new enzyme activities and identification of cytochrome P450 CYP72A1 as secologanin synthase.

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The molecular characterization of CYP72A1 from Catharanthus roseus (Madagascar periwinkle) was described nearly a decade ago, but the enzyme function remained unknown. We now show by in situ hybridization and immunohistochemistry that the expression in immature leaves is epidermis-specific. It thus

Homogeneous Strictosidine Synthase Isoenzymes from Cell Suspension Cultures of Catharanthus roseus.

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Four separable isoforms of Strictosidine synthase, which catalyze condensation of tryptamine with secologanin to form Strictosidine, were purified to homogeneity from cultured cells of CATHARANTHUS ROSEUS and from leaves of C. ROSEUS plants. These enzymes are distinguished by their isoelectric

Indole alkaloid accumulation and tryptophan decarboxylase activity in Catharanthus roseus cells cultured in three different media.

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Catharanthus roseus cells were cultured in three types of media. These media were: a low sucrose subculture medium and two high sucrose media, each of which differed in their mineral and hormonal contents. The kinetics of tryptophan decarboxylase activity and the accumulations of tryptophan,

[Advance in biosynthesis of terpenoid indole alkaloids and its regulation in Catharanthus roseus].

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Catharanthus roseus can produce a variety of terpenoid indole alkaloids (TIA), most of which exhibit strong pharmacological activities. Hence, biosynthesis and regulation of TIA have received recent attention. 3α (S)-strictosidine is an important node in TIA biosynthesis, which is a condensation

Effect of terpenoid precursor feeding and elicitation on formation of indole alkaloids in cell suspension cultures of Catharanthus roseus.

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The effects of terpenoid precursor feeding and elicitation by a biotic elicitor on alkaloid production of Catharanthus roseus suspension cultures were studied. After addition of secologanin, loganin or loganic acid an increase in the accumulation of ajmalicine and strictosidine and a decrease of

Influence of Precursor Availability on Alkaloid Accumulation by Transgenic Cell Line of Catharanthus roseus

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We have used a transgenic cell line of Catharanthus roseus (L.) G. Don to study the relative importance of the supply of biosynthetic precursors for the synthesis of terpenoid indole alkaloids. Line S10 carries a recombinant, constitutively overexpressed version of the endogenous strictosidine

Effect of precursor feeding on alkaloid accumulation by a tryptophan decarboxylase over-expressing transgenic cell line T22 of Catharanthus roseus.

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To obtain more insight into the regulation of terpenoid indole alkaloid (TIA) biosynthesis in Catharanthus roseus (L.) G. Don cell cultures and particularly to identify possible rate limiting steps, a transgenic cell line over-expressing tryptophan decarboxylase (Tdc), and thus having a high level

Secondary metabolite biosynthesis in cultured cells of Catharanthus roseus (L.) G. Don immobilized by adhesion to glass fibres.

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Suspension-cultured cells of Catharanthus roseus (L.) G. Don were immobilized on glass fibre mats and cultivated in shake flasks. The highly-aggregated immobilized cells exhibited a slower growth rate and accumulated reduced levels of tryptamine and indole alkaloids, represented by catharanthine and
Catharanthus roseus synthesizes a wide range of valuable monoterpene indole alkaloids, some of which have recently been recognized as functioning in plant defence mechanisms. More specifically, in aerial organ epidermal cells, vacuole-accumulated strictosidine displays a dual fate, being either the
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