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Страница 1 од 161 резултати
Partial purification and immunohistochemical localization of ATP diphosphohydrolase from Schistosoma mansoni. Immunological cross-reactivities with potato apyrase and Toxoplasma gondii nucleoside triphosphate hydrolase.
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ATP diphosphohydrolase from tegumental membranes of Schistosoma mansoni was solubilized with Triton X-100 plus deoxycholate and separated by preparative nondenaturing polyacrylamide gel electrophoresis. Two isoforms with ATP-hydrolytic activity were identified and excised from nondenaturing gels.
Suppression subtractive hybridization and comparative expression of a pore-forming toxin and glycosyl hydrolase genes in Rhizoctonia solani during potato sprout infection.
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Rhizoctonia solani is a plant pathogenic fungus that causes black scurf on tubers and stem and stolon canker on underground parts of potato plant. Early in the season, the fungus attacks germinating sprouts underground before they emerge from the soil. Damage at this stage results in delayed
Cloning and expression of soluble epoxide hydrolase from potato.
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Five cDNAs encoding a putative soluble epoxide hydrolase (sEH) from potato were isolated and characterized. The cDNAs contained open reading frames encoding 36 kDa polypeptides which were highly homologous to the carboxy terminal region of mammalian sEH. When one of the cDNAs was expressed in a
Active site of epoxide hydrolases revisited: a noncanonical residue in potato StEH1 promotes both formation and breakdown of the alkylenzyme intermediate.
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The carboxylate of Glu35 in the active site of potato epoxide hydrolase StEH1 interacts with the catalytic water molecule and is the first link in a chain of hydrogen bonds connecting the active site with bulk solvent. To probe its importance to catalysis, the carboxylate was replaced with an amide
Characterization of two juvenile hormone epoxide hydrolases by RNA interference in the Colorado potato beetle.
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In insect, juvenile hormone (JH) titers are tightly regulated in different development stages through synthesis and degradation pathways. During JH degradation, JH epoxide hydrolase (JHEH) converts JH to JH diol, and hydrolyses JH acid to JH acid diol. In this study, two full length LdJHEH cDNAs
The enzymic deacylation of phospholipids and galactolipids in plants. Purification and properties of a lipolytic acyl-hydrolase from potato tubers.
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An enzyme preparation that catalyses the deacylation of mono- and di-acyl phospholipids, galactosyl diglycerides, mono- and di-glycerides has been partially purified from potato tubers. The preparation also hydrolyses methyl and p-nitrophenyl esters and acts preferentially on esters of long-chain
Purification and properties of a lipid acyl-hydrolase from potato tubers.
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1. A pure lipid acyl-hydrolase was prepared from potato tubers by acetone precipitation, Sephadex G-100 and DEAE-Sephadex A-50 column chromatography, and by electrofocusing. 2. The purified enzyme was an acidic protein of pI 5.0 and molecular weight of about 70 000. Km values were 0.38 mM for
Conformational diversity and enantioconvergence in potato epoxide hydrolase 1.
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Potato epoxide hydrolase 1 (StEH1) is a biocatalytically important enzyme that exhibits rich enantio- and regioselectivity in the hydrolysis of chiral epoxide substrates. In particular, StEH1 has been demonstrated to enantioconvergently hydrolyze racemic mixes of styrene oxide (SO) to yield
Characterization of the lipid acyl hydrolase activity of the major potato (Solanum tuberosum) tuber protein, patatin, by cloning and abundant expression in a baculovirus vector.
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Patatin is a family of glycoproteins that accounts for 30-40% of the total soluble protein in potato (Solanum tuberosum) tubers. This protein has been reported not only to serve as a storage protein, but also to exhibit enzymic activity. By using a baculovirus system to express protein from the
Effect of freezing and thawing on the distribution of lysosomal hydrolases in leaves of Solanum tuberosum L.
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Density-gradient ultracentrifugation techniques showed that freezing and thawing of potato leaves resulted in a change in the density of subcellular particles containing acid phosphatase and acid ribonuclease (RNase). Gel filtration experiments were used to characterise the molecular forms of the
Selectivity of celite-immobilized patatin (lipid acyl hydrolase) from potato (Solanum tuberosum L.) tubers in esterification reactions As influenced by water activity and glycerol analogues as alcohol acceptors.
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Lipid acyl hydrolase (LAH; patatin) was purified from potato tubers by ammonium sulfate fractionation followed by anion-exchange and affinity chromatography. The major protein band of 40-43 kDa on SDS-PAGE appeared to be patatin, and it stained positive for lipase activity on native PAGE.
X-ray structure of potato epoxide hydrolase sheds light on substrate specificity in plant enzymes.
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Epoxide hydrolases catalyze the conversion of epoxides to diols. The known functions of such enzymes include detoxification of xenobiotics, drug metabolism, synthesis of signaling compounds, and intermediary metabolism. In plants, epoxide hydrolases are thought to participate in general defense
Translucent Tissue Defects in Solanum tuberosum L. : II. Alterations in Lipolytic Acyl Hydrolase, Lipoxygenase, and Morphology of Mitochondria and Amyloplasts.
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We analyzed a physiological defect that involved translucent-like tissue which occurred randomly in potato tubers (Solanum tuberosum L., cv Kennebec) after 8 months of storage. The translucent areas had reduced lipoxygenase (0.73-fold) and lipolytic acyl hydrolase (0.27-fold) activities. The
Enantioconvergent production of (R)-1-phenyl-1,2-ethanediol from styrene oxide by combining the Solanum tuberosum and an evolved Agrobacterium radiobacter AD1 epoxide hydrolases.
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Soluble epoxide hydrolase (EH) from the potato Solanum tuberosum and an evolved EH of the bacterium Agrobacterium radiobacter AD1, EchA-I219F, were purified for the enantioconvergent hydrolysis of racemic styrene oxide into the single product (R)-1-phenyl-1,2-ethanediol, which is an important
Exploring Solanum tuberosum Epoxide Hydrolase Internal Architecture by Water Molecules Tracking.
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Several different approaches are used to describe the role of protein compartments and residues in catalysis and to identify key residues suitable for the modification of the activity or selectivity of the desired enzyme. In our research, we applied a combination of molecular dynamics simulations
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