glutathione/kukorica

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Cloning, sequencing, crystallization and X-ray structure of glutathione S-transferase-III from Zea mays var. mutin: a leading enzyme in detoxification of maize herbicides.

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Glutathione S-transferases (GSTs) are enzymes that inactivate toxic compounds by conjugation with glutathione and are involved in resistance towards drugs, antibiotics, insecticides and herbicides. Their ability to confer herbicide tolerance in plants provides a tool to control weeds in a wide

Roles of dietary corn oil in the regulation of cytochromes P450 and glutathione S-transferases in rat liver.

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To study the molecular mechanisms by which dietary lipids affect the levels of cytochrome P450 (P450) isozymes, male Sprague-Dawley rats were fed either fat-free (FF) or 20% corn oil (CO) diet in combination with one of the following three treatments: no inducer, phenobarbital (PB) and acetone.

Functional and structural roles of the glutathione-binding residues in maize (Zea mays) glutathione S-transferase I.

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The isoenzyme glutathione S-transferase (GST) I from maize (Zea mays) was cloned and expressed in Escherichia coli, and its catalytic mechanism was investigated by site-directed mutagenesis and dynamic studies. The results showed that the enzyme promotes proton dissociation from the GSH thiol and

Copper-induced oxidative cleavage of glutathione transferase F1-1 from Zea mays.

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Study of the interaction of glutathione transferase F1-1 from Zea mays (ZmGSTF1-1) with Cu(II), in the presence of ascorbate showed that the enzyme was rapidly inactivated. The inactivation was time and Cu(II) concentration dependent. The rate of inactivation showed non-linear dependence on Cu(II)

Cysteine- and glutathione-mediated uptake of lead and cadmium into Zea mays and Brassica napus roots.

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This study examines a new mechanism for the uptake of Pb and Cd into Brassica napus and Zea mays roots. During hydroponic experiments, the uptake of Pb and Cd was enhanced in the presence of cysteine and glutathione, whereas no or very low uptake was observed in EDTA and penicillamine controls.

Regulation of glutathione S-transferases of Zea mays in plants and cell cultures.

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An antiserum to glutathione S-transferase (EC 2.5.1.18) from maize (Zea mays L.) responsible for herbicide detoxification has been raised in rabbit. The antiserum was specific to the Mr 26000 subunit of the enzyme from maize seedlings and suspension-cultured cells, and recognized the isoenzymes

Binding and protection of porphyrins by glutathione S-transferases of Zea mays L.

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Glutathione S-transferases (GSTs) are multi-functional enzymes, known to conjugate xenobiotics and degrade peroxides. Herein, we report on the potential of four Zea mays GST isoforms (Zm GST I-I, Zm GST I-II, Zm GST II-II and Zm GST III-III) to act as binding and protection proteins. These isoforms

Comparison of glutathione S-transferases of Zea mays responsible for herbicide detoxification in plants and suspension-cultured cells.

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The metabolism of the s-triazine herbicide atrazine has been compared in Zea mays seedlings and cell suspension cultures. The rapid detoxification observed in the shoots of whole plants was not seen in the cultured cells. This difference in metabolism could be accounted for by the varying substrate

Purification and characterization of a glutathione S-transferase from benoxacor-treated maize (Zea mays).

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A glutathione S-transferase (GST) isozyme from maize (Zea mays Pioneer hybrid 3906) treated with the dichloroacetamide herbicide safener benoxacor (CGA-154281) was purified to homogeneity and partially characterized. The enzyme, assayed with metolachlor as a substrate, was purified approximately

Feeding corn oil to vitamin E-deficient pigs increases lipid peroxidation and decreases tissue glutathione concentrations.

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Dietetic microangiopathy ("mulberry heart disease") is a common disease of weaned pigs in several countries. It is characterised by sudden death and has been associated with vitamin E deficiency. We investigated whether it could be induced by depleting pigs of vitamin E with or without a mild

Expression Patterns of Genes Involved in Ascorbate-Glutathione Cycle in Aphid-Infested Maize (Zea mays L.) Seedlings.

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Reduced forms of ascorbate (AsA) and glutathione (GSH) are among the most important non-enzymatic foliar antioxidants in maize (Zea mays L.). The survey was aimed to evaluate impact of bird cherry-oat aphid (Rhopalosiphum padi L.) or grain aphid (Sitobion avenae F.) herbivory on expression of genes

Salicylic acid-induced nitric oxide enhances arsenic toxicity tolerance in maize plants by upregulating the ascorbate-glutathione cycle and glyoxalase system

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The role of nitric oxide (NO) in salicylic acid (SA)-induced tolerance to arsenic (As) stress in maize plants is not reported in the literature. Before starting As stress (AsS) treatments, SA (0.5 mM) was sprayed to the foliage of maize plants. Thereafter, AsV (0.1 mM as sodium hydrogen arsenate

Effects of nicosulfuron on growth, oxidative damage, and the ascorbate-glutathione pathway in paired nearly isogenic lines of waxy maize (Zea mays L.).

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Nicosulfuron is a postemergence herbicide used for weed control in maize fields (Zea mays L.). We used the pair of nearly isogenic inbred lines, SN509-R (nicosulfuron resistant) and SN509-S (nicosulfuron sensitive), to study the effect of nicosulfuron on growth, oxidative stress, and the

Expression profiling of selected glutathione transferase genes in Zea mays (L.) seedlings infested with cereal aphids.

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The purpose of this report was to evaluate the expression patterns of selected glutathione transferase genes (gst1, gst18, gst23 and gst24) in the tissues of two maize (Zea mays L.) varieties (relatively resistant Ambrozja and susceptible Tasty Sweet) that were colonized with oligophagous bird

Simultaneous femtomole determination of cysteine, reduced and oxidized glutathione, and phytochelatin in maize (Zea mays L.) kernels using high-performance liquid chromatography with electrochemical detection.

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Thiol compounds such as cysteine (Cys), reduced (GSH) and oxidized (GSSG) gluathione, and phytochelatins (PCs) play an important role in heavy metal detoxification in plants. These thiols are biological active compounds whose function is elimination of oxidative stress in plant cells. The aim of our

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