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https://dx.doi.org/10.25673/26...
Doctoral thesis . 2007
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cDNA library construction towards the identification of the ipecac alkaloid biosynthesis genes in tissue cultures of Psychotria ipecacuanha - preliminary characterization of the first isolated enzyme, ipecoside ß-D-glucosidase

Authors: Lara Quesada, Alfonso;

cDNA library construction towards the identification of the ipecac alkaloid biosynthesis genes in tissue cultures of Psychotria ipecacuanha - preliminary characterization of the first isolated enzyme, ipecoside ß-D-glucosidase

Abstract

Die erste cDNA Bank von Psychotria ipecacuanha wurde aus in vitro Wurzelkulturen hergestellt. Pflanzenmaterial aus Costa Rica wurde zur Etablierung von Wurzelkulturen von P. ipecacuanha benutzt. Das Alkaloidprofil zeigte Ipecac Alkaloide beider (R)- und (S)- Konfigurationen in Blättern- und Wurzelgeweben und beinhaltete die medizinisch relevanten Alkaloide Cephaeline und Emetine. Die expressed sequence tag (EST) Analyse der cDNA Bank identifizierte verschiedene Klone, die Ähnlichkeit zu Genen des Sekundärstoffwechsels aufwiesen. Zwei Klone zeigten Homologie zu Genen des Monoterpenoid Indole Alkaloid Biosynthesewegs. Das erste isolierte Ipecac Alkaloid Sekundärstoffwechsel Gen aus P. ipecacuanha, Ipecoside β-D-Glucosidase wurde kloniert, heterolog exprimiert und anfänglich charakterisiert. Verschiedene Alkaloid-, Flavonoid-, Phenol- β-Glucoside wurden getestet; eine sehr hohe spezifische deglucosylierende Aktivität wurde mit dem Substrat Ipecoside detektiert.

A cDNA library of Psychotria ipecacuanha was generated from in vitro root culture. Plant material from Costa Rica was used for the establishment of root culture of P. ipecacuanha. An alkaloid profile analysis identified ipecac alkaloids of both (R)- and (S)- configurations in leaves and root tissues including the medicinal relevant alkaloids cephaeline and emetine. Expressed sequence tag (EST) analysis of the cDNA library detected several clones related to secondary metabolism including two clones with homology to monoterpenoid indole alkaloid biosynthetic pathway genes. The first isolated ipecac alkaloid biosynthetic pathway gene from P. ipecacuanha, ipecoside β-D-glucosidase was cloned, heterologous expressed and preliminary characterized. From several alkaloid-, flavonoid-, phenol- β-glucosides tested; a very specific deglucosylation activity was detected with the substrate ipecoside.

Country
Germany
Keywords

570, 572, ddc:572, Hochschulschrift, 610, 600, Elektronische Publikation, 572.86362393, ddc:570, Online-Publikation, Zsfassung in dt. Sprache, 572.549452393

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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