lochnericine/catharanthus roseus

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Two Tabersonine 6,7-Epoxidases Initiate Lochnericine-Derived Alkaloid Biosynthesis in Catharanthus roseus.

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Lochnericine is a major monoterpene indole alkaloid (MIA) in the roots of Madagascar periwinkle (Catharanthus roseus). Lochnericine is derived from the stereoselective C6,C7-epoxidation of tabersonine and can be metabolized further to generate other complex MIAs. While the enzymes responsible for

A note on the alkaloids of Vinca rosea Linn. (Catharanthus roseus G. Don.). II. Catharanthine, lochnericine, vindolinine, and vindoline.

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Biotransformation of tabersonine in cell suspension cultures of Catharanthus roseus.

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To investigate the reactions involved in the biosynthesis of vindoline from tabersonine, the bioconversion products formed when the latter compound was fed to cell suspension cultures of Catharanthus roseus were isolated and characterized. Two biotransformation products of tabersonine were isolated

Effects of buffered media upon growth and alkaloid production of Catharanthus roseus hairy roots.

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The influence of buffered media upon the growth and alkaloid productivity of Catharanthus roseus hairy root culture was examined. As expected, the buffers minimized shifts in the pH of the media and had slightly negative effects upon growth. The growth of the hairy roots remained optimal in

Jasmonate-induced epoxidation of tabersonine by a cytochrome P-450 in hairy root cultures of Catharanthus roseus.

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Methyl jasmonate, a chemical inducer of secondary metabolism, was shown to promote tabersonine 2 biosynthesis in hairy root cultures of Catharanthus roseus. Tabersonine 6,7-epoxidase activity was detected in total protein extract of jasmonate-induced hairy root cultures using labeled 14C-tabersonine

Role of the non-mevalonate pathway in indole alkaloid production by Catharanthus roseus hairy roots.

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The 1-deoxy-D-xylulose-5-phosphate (DXP) pathway (non-mevalonate pathway) leading to terpenoids via isopentenyl diphosphate (IPP) has been shown to occur in most bacteria and in all higher plants. Treatment with the antibiotic fosmidomycin, a specific inhibitor of DXP reductoisomerase, considerably

Expression of a feedback-resistant anthranilate synthase in Catharanthus roseus hairy roots provides evidence for tight regulation of terpenoid indole alkaloid levels.

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Different plant species produce a variety of terpenoid indole alkaloids, which are of interest as plant defensive secondary metabolites and as valuable pharmaceuticals. Although significant progress has been made, the mechanisms regulating the levels of this important class of compounds require

[Monomeric indole alkaloids from the aerial parts of Catharanthus roseus].

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Catharanthus roseus (L.) G. Don is a plant of the Catharanthus genus of Apocynaceae which has been reported to have therapeutic effects of detoxication and anticancer. In order to further study the alkaloid constituents of C. roseus, the aerial parts of the plant were extracted with 95% EtOH, and

Transient effects of overexpressing anthranilate synthase alpha and beta subunits in Catharanthus roseus hairy roots.

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Catharanthus roseus produces two economically valuable anticancer drugs, vinblastine and vincristine. These drugs are members of the terpenoid indole alkaloids and accumulate in small quantities within the plant; thus these two drugs are expensive to produce. Metabolic engineering efforts have

Synergistic and cytotoxic action of indole alkaloids produced from elicited cell cultures of Catharanthus roseus.

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BACKGROUND Catharanthus roseus (L.) G. Don (Apocynaceae) is a medicinal plant that produces more than 130 alkaloids, with special attention given to the production of the anti-hypertensive monomeric indole alkaloids, serpentine and ajmalicine, and the antitumor dimeric alkaloids, vinblastine and

Expression of tabersonine 16-hydroxylase and 16-hydroxytabersonine-O-methyltransferase in Catharanthus roseus hairy roots.

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The monoterpene indole alkaloids vindoline and catharanthine, which are exclusively synthesized in the medicinal plant Catharanthus roseus, are the two important precursors for the production of pharmaceutically important anti-cancer medicines vinblastine and vincristine. Hairy root culture is an

The expression of 1-deoxy-D-xylulose synthase and geraniol-10-hydroxylase or anthranilate synthase increases terpenoid indole alkaloid accumulation in Catharanthus roseus hairy roots.

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The terpenoid indole alkaloid (TIA) pathway in Catharanthus roseus produces two important anticancer drugs, vinblastine and vincristine, in very low yields. This study focuses on overexpressing several key genes in the upper part of the TIA pathway in order to increase flux toward downstream

Effect of sodium nitroprusside on growth and terpenoid indole alkaloid production in Catharanthus roseus hairy root cultures.

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Nitric oxide (NO) is known as a signaling molecule involved in elicitor-induced defense responses of plants. Sodium nitroprusside (SNP), a donor of NO, stimulates catharanthine formation in Catharanthus roseus cells.1 Two important terpenoid indole alkaloids produced in small quantities within C.

Effects of terpenoid precursor feeding on Catharanthus roseus hairy roots over-expressing the alpha or the alpha and beta subunits of anthranilate synthase.

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Among the pharmacologically important terpenoid indole alkaloids produced by Catharanthus roseus are the anti-cancer drugs vinblastine and vincristine. These two drugs are produced in small yields within the plant, which makes them expensive to produce commercially. Metabolic engineering has focused

Engineering overexpression of ORCA3 and strictosidine glucosidase in Catharanthus roseus hairy roots increases alkaloid production.

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Catharanthus roseus produces many pharmaceutically important terpenoid indole alkaloids (TIAs) such as vinblastine, vincristine, ajmalicine, and serpentine. Past metabolic engineering efforts have pointed to the tight regulation of the TIA pathway and to multiple rate-limiting reactions.

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