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cystathionine/batata
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12 resultados
Enhanced cystathionine beta-lyase activity in transgenic potato plants does not force metabolite flow towards methionine.
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Cystathionine beta-lyase (CbL) catalyses the second step in higher-plant methionine biosynthesis. To further characterise the role of CbL in methionine biosynthesis, transgenic potato (Solanum tuberosum L.) plants were generated that express a potato cystathionine beta-lyase (StCbL; EC 4.4.1.8)
Transgenic potato plants reveal the indispensable role of cystathionine beta-lyase in plant growth and development.
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Methionine (Met) is an essential amino acid that is often unavailable at sufficient dietary levels. In order to better understand Met pathway regulation, a cDNA encoding cystathionine beta-lyase (CbL; EC 4.4.1.8) has been cloned from Solanum tuberosum. An antisense construct of this gene was used to
Functional analysis of cystathionine gamma-synthase in genetically engineered potato plants.
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In plants, metabolic pathways leading to methionine (Met) and threonine diverge at the level of their common substrate, O-phosphohomoserine (OPHS). To investigate the regulation of this branch point, we engineered transgenic potato (Solanum tuberosum) plants affected in cystathionine gamma-synthase
Concurrent Overexpression of Arabidopsis thaliana Cystathionine γ-Synthase and Silencing of Endogenous Methionine γ-Lyase Enhance Tuber Methionine Content in Solanum tuberosum.
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Potatoes (Solanum tuberosum) are deficient in methionine, an essential amino acid in human and animal diets. Higher methionine levels increase the nutritional quality and promote the typically pleasant aroma associated with baked and fried potatoes. Several attempts have been made to elevate tuber
Regulation of aspartate-derived amino acid homeostasis in potato plants (Solanum tuberosum L.) by expression of E. coli homoserine kinase.
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The availability of the carbon backbone O-phosphohomoserine (OPHS) is critical to methionine (met) and threonine (thr) synthesis. OPHS derives from homoserine and is formed by homoserine kinase (HSK). To clarify the function of HSK in cellular metabolism, the E. coli HSK ortholog thrB was expressed
The effects of enhanced methionine synthesis on amino acid and anthocyanin content of potato tubers.
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BACKGROUND
Potato is a staple food in the diet of the world's population and also being used as animal feed. Compared to other crops, however, potato tubers are relatively poor in the essential amino acid, methionine. Our aim was to increase the methionine content of tubers by co-expressing a gene
Engineering of cysteine and methionine biosynthesis in potato.
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Methionine and cysteine, two amino acids containing reduced sulfur, are not only an important substrate of protein biosynthesis but are also precursors of various other metabolites such as glutathione, phytochelatines, S-adenosylmethionine, ethylene, polyamines, biotin, and are involved as methyl
Regulatory role of cystathionine-gamma-synthase and de novo synthesis of methionine in ethylene production during tomato fruit ripening.
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The essential amino acid methionine is a substrate for the synthesis of S-adenosyl-methionine (SAM), that donates its methyl group to numerous methylation reactions, and from which polyamines and ethylene are generated. To study the regulatory role of methionine synthesis in tomato fruit ripening,
Enhancement of the primary flavor compound methional in potato by increasing the level of soluble methionine.
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The primary flavor compound in potato, methional, is synthesized from methionine by the Strecker degradation reaction. A major problem associated with potato processing is the loss of methional. Methional or its precursor, methionine, is not added back during potato processing due to high costs of
Antisense inhibition of threonine synthase leads to high methionine content in transgenic potato plants.
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Methionine (Met) and threonine (Thr) are members of the aspartate family of amino acids. In plants, their biosynthetic pathways diverge at the level of O-phosphohomo-serine (Ser). The enzymes cystathionine gamma-synthase and Thr synthase (TS) compete for the common substrate O-phosphohomo-Ser with
Homocysteine over-accumulation as the effect of potato leaves exposure to biotic stress.
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Homocysteine (Hcy) is a naturally occurring intermediate metabolite formed during methionine metabolism. It has been well documented that its excess can be extremely toxic to mammalian, yeast and bacterial cells. In spite of the metabolic value of Hcy known for decades, the role of this amino acid
Pyrimethanil Sensitivity and Resistance Mechanisms in Penicillium digitatum
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Pyrimethanil is an anilinopyrimidines (AP) fungicide and highly effective in controlling green mold caused by Penicillium digitatum but has not yet been registered in China to control postharvest diseases of citrus. In the present study, baseline sensitivity of P. digitatum to pyrimethanil was
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