artemisinin/nicotiana

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[Advances in synthesis of artemisinin based on plant genetic engineering].

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Artemisinin is a kind of sesquiterpene lactone containing endoperoxide bridge,which is the most effective anti-malarial drug at present. However,low content of artemisinin in Artemisia annua,ranging from 0. 1%-1. 0% of dry weight,as well as the complicated extraction process have resulted in low

Nicotiana benthamiana as a production platform for artemisinin precursors.

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BACKGROUND Production of pharmaceuticals in plants provides an alternative for chemical synthesis, fermentation or natural sources. Nicotiana benthamiana is deployed at commercial scale for production of therapeutic proteins. Here the potential of this plant is explored for rapid production of

The metabolite chemotype of Nicotiana benthamiana transiently expressing artemisinin biosynthetic pathway genes is a function of CYP71AV1 type and relative gene dosage.

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Artemisia annua, which produces the anti-malaria compound artemisinin, occurs as high-artemisinin production (HAP) and low-artemisinin production (LAP) chemotypes. Understanding the basis of the difference between these chemotypes would assist breeding and optimising artemisinin biosynthesis. Here

Trichome-specific expression of the amorpha-4,11-diene 12-hydroxylase (cyp71av1) gene, encoding a key enzyme of artemisinin biosynthesis in Artemisia annua, as reported by a promoter-GUS fusion.

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Artemisinin derivatives are effective anti-malarial drugs. In order to design transgenic plants of Artemisia annua with enhanced biosynthesis of artemisinin, we are studying the promoters of genes encoding enzymes involved in artemisinin biosynthesis. A 1,151 bp promoter region of the cyp71av1 gene,

Transient production of artemisinin in Nicotiana benthamiana is boosted by a specific lipid transfer protein from A. annua.

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Our lack of full understanding of transport and sequestration of the heterologous products currently limit metabolic engineering in plants for the production of high value terpenes. For instance, although all genes of the artemisinin/arteannuin B (AN/AB) biosynthesis pathway (AN-PW) from Artemisia

Amorpha-4,11-diene synthase of Artemisia annua: cDNA isolation and bacterial expression of a terpene synthase involved in artemisinin biosynthesis.

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Artemisia annua, an indigenous plant to Korea, contains an antimalarial sesquiterpene, artemisinin. The first committed step of artemisinin biosynthesis is the cyclization of farnesyl diphosphate by a sesquiterpene synthase to produce an amorphane-type ring system. The aims of this research were to

Isolation and characterization of AaWRKY1, an Artemisia annua transcription factor that regulates the amorpha-4,11-diene synthase gene, a key gene of artemisinin biosynthesis.

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Amorpha-4,11-diene synthase (ADS) of Artemisia annua catalyzes the conversion of farnesyl diphosphate into amorpha-4,11-diene, the first committed step in the biosynthesis of the antimalarial drug artemisinin. The promoters of ADS contain two reverse-oriented TTGACC W-box cis-acting elements, which

Amorpha-4,11-diene synthase: cloning and functional expression of a key enzyme in the biosynthetic pathway of the novel antimalarial drug artemisinin.

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The sesquiterpenoid artemisinin, isolated these from the plant Artemisia annua L., and its semi-synthetic derivatives are a new and very effective group of antimalarial drugs. A branch point in the biosynthesis of this compound is the cyclisation of the ubiquitous precursor farnesyl diphosphate into

OSC2 and CYP716A14v2 catalyze the biosynthesis of triterpenoids for the cuticle of aerial organs of Artemisia annua.

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Artemisia annua is widely studied for its ability to accumulate the antimalarial sesquiterpenoid artemisinin. In addition to producing a variety of sesquiterpenoids, A. annua also accumulates mono-, di-, and triterpenoids, the majority of which are produced in the glandular trichomes. A. annua also

[Recent advances in the study of amorpha-4,11-diene synthase and its metabolic engineering].

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Amorpha-4,11-diene synthase (ADS) can convert farnesyl pyrophosphate (FPP) to amorpha-4, 11-diene, a precursor of artemisinin. ADS plays an important role in the biosynthesis of artemisinin. This review summarizes the molecular biology and metabolic engineering study of ADS in recent years. The

[Isolation and characterization of promoter of ADS from Artemisia annua].

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OBJECTIVE To try to find the ways to enhance the expression of ADS gene encoding amorpha-4,11-diene synthase, a key enzyme in artemisinin biosynthesis pathway catalyzing the formation of amorpha-4,11-diene from farnesyl diphosphate, and accelerate the artemisinin synthesis, the promoter of ADS was

(+)-Valencene production in Nicotiana benthamiana is increased by down-regulation of competing pathways.

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Plant sesquiterpenes, such as (+)-valencene, artemisinin, and farnesene are valuable chemicals for use as aromatics, pharmaceuticals, and biofuels. Plant-based production systems for terpenoids critically depend on the availability of farnesyl diphosphate (FPP). Currently, these systems show

Functional expression and characterization of sesquiterpene synthases from Artemisia annua L. using transient expression system in Nicotiana benthamiana.

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Artemisia annua L. produces a number of sesquiterpene synthases, which catalyze the conversion of farnesyl diphosphate to various sesquiterpenes. The cDNAs encoding amorpha-4,11-diene synthase (ADS), a key enzyme in the artemisinin biosynthesis, and epi-cedrol synthase (ECS), a complex sesquiterpene

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