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8 resultados
Cloning, expression, and characterization of epi-cedrol synthase, a sesquiterpene cyclase from Artemisia annua L.
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Sesquiterpene cyclases (synthases) catalyze the conversion of the isoprenoid intermediate farnesyl diphosphate to various sesquiterpene structural types. In plants, many sesquiterpenes are produced as defensive chemicals (phytoalexins) or mediators of chemical communication (i.e., pollinator
Enhancing epi-cedrol production in Escherichia coli by fusion expression of farnesyl pyrophosphate synthase and epi-cedrol synthase
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Terpene synthase catalyses acyclic diphosphate farnesyl diphosphate into desired sesquiterpenes. In this study, a fusion enzyme was constructed by linking Santalum album farnesyl pyrophosphate synthase (SaFPPS) individually with terpene synthase and Artemisia annua Epi-cedrol
[Advances in sesquiterpene synthases cyclases of Artemisia annua].
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Artemisinin,a new and a very potent antimalarial drug, is produced by the plant Artemisia annua L. with a very low yield ranging from 0.01% to 0.8% on a dry-weight basis. This makes artemisinin an expensive drug. Several studies reported chemical synthesis of the artemisinin, but none of them seems
Studies on the expression of sesquiterpene synthases using promoter-β-glucuronidase fusions in transgenic Artemisia annua L.
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In order to better understand the influence of sesquiterpene synthases on artemisinin yield in Artemisia annua, the expression of some sesquiterpene synthases has been studied using transgenic plants expressing promoter-GUS fusions. The cloned promoter sequences were 923, 1182 and 1510 bp for
Relative expression of genes of terpene metabolism in different tissues of Artemisia annua L.
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BACKGROUND
Recently, Artemisia annua L. (annual or sweet wormwood) has received increasing attention due to the fact that the plant produces the sesquiterpenoid endoperoxide artemisinin, which today is widely used for treatment of malaria. The plant produces relatively small amounts of artemisinin
The molecular cloning of 8-epicedrol synthase from Artemisia annua.
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A cDNA library was prepared from Artemisia annua, and a 129-bp fragment was amplified from this library using primers corresponding to sequences conserved in known dicot sesquiterpene synthases. A 1641-bp open reading frame that encoded a predicted protein 35-38% identical to dicot sesquiterpene
Differential transcriptome analysis of glandular and filamentous trichomes in Artemisia annua.
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BACKGROUND
The medicinal plant Artemisia annua is covered with filamentous trichomes and glandular, artemisinin producing trichomes. A high artemisinin supply is needed at a reduced cost for treating malaria. Artemisinin production in bioreactors can be facilitated if a better insight is obtained in
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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