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tryptamine/nicotiana
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8 résultats
High levels of tryptamine accumulation in transgenic tobacco expressing tryptophan decarboxylase.
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A full-length complementary DNA clone encoding tryptophan decarboxylase (TDC; EC 4.1.1.28) from Catharanthus roseus (De Luca V, Marineau C, Brisson N [1989] Proc Natl Acad Sci USA 86: 2582-2586) driven by the CaMV 35S promoter was introduced into tobacco (Nicotiana tabacum) to direct the synthesis
Nucleotide sequence of the tryptophan decarboxylase gene of Catharanthus roseus and expression of tdc-gusA gene fusions in Nicotiana tabacum.
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The enzyme tryptophan decarboxylase (TDC; EC 4.1.1.28) converts tryptophan into tryptamine. In Catharanthus roseus and other plants capable of producing terpenoid indole alkaloids (TIAs) TDC links primary metabolism to the secondary metabolic pathway involved in the biosynthesis of these compounds.
Wound-inducible biosynthesis of phytoalexin hydroxycinnamic acid amides of tyramine in tryptophan and tyrosine decarboxylase transgenic tobacco lines.
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The wound-activated biosynthesis of phytoalexin hydroxycinnamic acid amides of tyramine was compared in untransformed and transgenic tobacco (Nicotiana tabacum) lines that express tryptophan decarboxylase (TDC), tyrosine decarboxylase (TYDC), or both activities. Transgenic in vitro-grown tobacco
Indole-3-acetic Acid Synthesis in Tumorous and Nontumorous Species of Nicotiana.
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The synthesis of indole-3-acetic acid (IAA) in the enzyme extracts of Nicotiana glauca, Nicotiana langsdorffii, their F1 hybrid, their amphidiploid hybrid, and the nontumorous mutant of the hybrid was investigated. Tryptamine, a possible precursor of IAA biosynthesis in Nicotiana tabacum, was not
Expression of enzymatically active and correctly targeted strictosidine synthase in transgenic tobacco plants.
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Strictosidine, a precursor to over 1000 indole alkaloids including the anti-tumor drugs vinblastine, vincristine, and camptothecin, is produced by the condensation of tryptamine and secologanin. Strictosidine synthase, the enzyme responsible for this condensation, is the first committed step in the
Strictosidine synthase from Rauvolfia serpentina: analysis of a gene involved in indole alkaloid biosynthesis.
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The gene for strictosidine synthase (str1), the enzyme which catalyzes the stereospecific condensation of tryptamine and secologanin to form the key indole alkaloid 3 alpha(S)-strictosidine has been isolated from genomic libraries prepared from Rauvolfia serpentina (India) and from Rauvolfia mannii
Targeting tryptophan decarboxylase to selected subcellular compartments of tobacco plants affects enzyme stability and in vivo function and leads to a lesion-mimic phenotype.
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Tryptophan decarboxylase (TDC) is a cytosolic enzyme that catalyzes an early step of the terpenoid indole alkaloid biosynthetic pathway by decarboxylation of L-tryptophan to produce the protoalkaloid tryptamine. In the present study, recombinant TDC was targeted to the chloroplast, cytosol, and
Suspension cultured transgenic cells of Nicotiana tabacum expressing tryptophan decarboxylase and strictosidine synthase cDNAs from Catharanthus roseus produce strictosidine upon secologanin feeding.
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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
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