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Occurrence and Regulatory Properties of Uridine Diphosphatase in Fully Expanded Leaves of Soybean (Glycine max Merr.) and Other Species.
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High activities (100-200 micromoles UDP hydrolyzed per milligram chlorophyll per hour) of uridine-5' diphosphatase (UDPase) have been identified in extracts of fully expanded soybean (Glycine max Merr.) leaves. In desalted crude extracts, UDPase activity was strongly inhibited by low concentrations
Synthesis of Isorhamnetin-3-O-Rhamnoside by a Three-Enzyme (Rhamnosyltransferase, Glycine Max Sucrose Synthase, UDP-Rhamnose Synthase) Cascade Using a UDP-Rhamnose Regeneration System.
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Isorhamnetin-3-O-rhamnoside was synthesized by a highly efficient three-enzyme (rhamnosyltransferase, glycine max sucrose synthase and uridine diphosphate (UDP)-rhamnose synthase) cascade using a UDP-rhamnose regeneration system. The rhamnosyltransferase gene (78D1) from Arabidopsis
Synthesis of beta-(1-->3)-Glucan from Extracellular Uridine Diphosphate Glucose as a Wound Response in Suspension-cultured Soybean Cells.
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Soybean (Glycine max) suspension-cultured cells were incubated with 600 micromolar uridine diphosphate [(14)C]glucose, and the incorporation into alkali-insoluble material was studied. When the cells were kept in suspension by shaking on a linear shaker, the incorporation was very low. The
Identification of an UDP-glucose: Flavonol 3-O-glucosyl-transferase from cell suspension cultures of soybean (Glycine max L.).
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A glucosyltransferase, which catalyses the glucosylation of flavonols, using uridine diphosphate-D-glucose as glucose donor, has been isolated and purified about 5-10 fold from cell suspension cultures of soybean (Glycine max L., var. Mandarin). The pH optimum for this reaction was ca. 8.5 in
Biochemical Basis for Partitioning of Photosynthetically Fixed Carbon between Starch and Sucrose in Soybean (Glycine max Merr.) Leaves.
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The control of photosynthetic starch/sucrose formation in leaves of soybean (Glycine max L. Merr.) cultivars was studied in relation to stage of plant development, photosynthetic photoperiod, and nitrogen source. At each sampling, leaf tissue was analyzed for starch content, activities of
Of the Nine Cytidine Deaminase-Like Genes in Arabidopsis, Eight Are Pseudogenes and Only One Is Required to Maintain Pyrimidine Homeostasis in Vivo.
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CYTIDINE DEAMINASE (CDA) catalyzes the deamination of cytidine to uridine and ammonia in the catabolic route of C nucleotides. The Arabidopsis (Arabidopsis thaliana) CDA gene family comprises nine members, one of which (AtCDA) was shown previously in vitro to encode an active CDA. A possible role in
Possible control of maize leaf sucrose-phosphate synthase activity by light modulation.
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Sucrose phosphate synthase (SPS) activity was measured in extracts of maize (Zea mays L.) and soybean (Glycine max L. [Merr.]) leaves over a single day/night cycle. There was a 2- to 3-fold postillumination increase in extractable enzyme activity in maize leaves, whereas the activity of soybean SPS
Species and Environmental Variations in the Effect of Inorganic Phosphate on Sucrose-Phosphate Synthase Activity : Reliability of Assays Based Upon UDP Formation.
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The effect of inorganic phosphate (Pi) on sucrose-phosphate synthase (SPS) activity was determined for the enzyme from five plant species (Nicotiana tabacum L., Spinacia oleracea L., Triticum aestivum L., Zea mays L., Glycine max L.) using two assay methods. The assay method based on determination
Intracellular localization of prenyltransferases of isoflavonoid phytoalexin biosynthesis in bean and soybean.
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The intracellular localization of prenyltransferases involved in the biosynthesis of the phytoalexins glyceollin in soybean (Glycine max L.) and phaseollin in French bean (Phaseolus vulgaris L.) has been investigated. By sucrose- and Percoll-gradient centrifugation of microsomes of an
One-Pot Synthesis of Hyperoside by a Three-Enzyme Cascade Using a UDP-Galactose Regeneration System.
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Hyperoside exhibits many biological properties and is more soluble in water than quercetin. A uridine 5'-diphosphate (UDP) galactose regeneration system and one-pot synthesis of hyperoside was described herein. Glycine max sucrose synthase (GmSUS) was coupled with Escherichia coli UDP-galactose
Cellulose and 1,3-glucan synthesis during the early stages of wall regeneration in soybean protoplasts.
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Protoplasts isolated from cultured soybean cells (Glycine max (L.) Merr., cv. Mandarin) were used to study polysaccharide biosynthesis during the initial stages of cell wall-regeneration. Within minutes after the protoplasts were transferred to a wall-regeneration medium containing [(14)C]glucose,
Free amino Acid content and metabolic activities of setting and aborting soybean ovaries.
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Fruits of soybean (Glycine max [L.] Merr.) that are destined to abscise shortly after anthesis grow more slowly than fruits that will be retained. In this work, amino acid composition, protein metabolism, and nucleic acid metabolism were studied in setting and abscising soybean ovaries from anthesis
Glycosyltransferase cascades for natural product glycosylation: Use of plant instead of bacterial sucrose synthases improves the UDP-glucose recycling from sucrose and UDP.
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Natural product glycosylations by Leloir glycosyltransferases (GTs) require expensive nucleotide-activated sugars as substrates. Sucrose synthase (SuSy) converts sucrose and uridine 5'-diphosphate (UDP) into UDP-glucose. Coupling of SuSy and GT reactions in one-pot cascade transformations creates a
Effects of Cycloheximide upon Formation of Ribonucleic Acid Cytidylic and Uridylic Acids.
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Concentrations of cycloheximide as low as 3 mug/ml inhibited incorporation of labeled orotic acid or uridine into RNA cytidylic acid of soybean (Glycine max) hypocotyl sections. Even lower concentrations of this well known protein synthesis inhibitor interfered with conversion of labeled cytidine
Biosynthesis of flavone C-glucosides in engineered Escherichia coli.
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Two plant-originated C-glucosyltransferases (CGTs) UGT708D1 from Glycine max and GtUF6CGT1 from Gentiana triflora were accessed for glucosylation of selected flavones chrysin and luteolin. Uridine diphosphate (UDP)-glucose pool was enhanced in Escherichia coli cell cytosol by introducing
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