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Bls 1 frá 164 niðurstöður
Identification and characterization of MOR-CP, a cysteine protease induced by ozone and developmental senescence in maize (Zea mays L.) leaves.
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Among the different classes of endoproteases, cysteine proteases are consistently associated with senescence, defense signaling pathways and cellular responses to abiotic stresses. The objectives of this work were to study the effects of various concentrations of ozone on gene expression and
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
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.
Computational study on substrate specificity of a novel cysteine protease 1 precursor from Zea mays.
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Cysteine protease 1 precursor from Zea mays (zmCP1) is classified as a member of the C1A family of peptidases (papain-like cysteine protease) in MEROPS (the Peptidase Database). The 3D structure and substrate specificity of the zmCP1 is still unknown. This study is the first one to build the 3D
Characterization of three distinct cDNA clones encoding cysteine proteinases from maize (Zea mays L.) callus.
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In previous work, a 33 kDa cysteine proteinase was found in callus initiated from maize (Zea mays L.) resistant to fall armyworm feeding. A callus cDNA library from the maize inbred Mp708 was screened with oligonucleotides derived from the N-terminal amino acid sequence of the 33 kDa proteinase and
Mass spectrometric analysis reveals a cysteine bridge between residues 2 and 61 of the auxin-binding protein 1 from Zea mays L.
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The major auxin-binding protein (ZmERabp1) from maize (Zea mays L.) has been structurally characterized. We determined the position of a disulfide bridge in ZmERabp1 by mass-spectrometric analysis. We show that Cys2 and Cys61 are covalently linked and that residue Cys155 bears the free sulfhydryl
Heterologous expression of maize (Zea mays L.) Mir1 cysteine proteinase in eukaryotic and prokaryotic expression systems.
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Several heterologous expression systems were tested for their ability to express a unique maize cysteine proteinase Mir1. A baculovirus-based expression system using Trichoplusia ni larvae as host resulted in the expression of Mir1 that was correctly processed and exhibited proteinase activity.
Molecular cloning and structural analysis of genes from Zea mays (L.) coding for members of the ras-related ypt gene family.
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We have isolated, cloned, and characterized two cDNAs from Zea mays (L.), denoted yptm1 and yptm2, encoding proteins related to the ypt protein family. Amino acid similarity scores with YPT1 from yeast and ypt from mouse are in the range of 70% for yptm1 and 74% for yptm2, respectively, whereas
Influence of diethyl maleate and cysteine on tissue glutathione and growth in broiler chickens.
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The objectives of this study were to determine the effects of diethyl maleate (DEM) and l-cysteine (L-Cys) on tissue glutathione (GSH) and growth in male broiler chickens. In Experiment 1, broilers were treated with DEM (0, 1.5, 3, 6, or 12.0 mmol/kg BW, i.p.). After 1 h, maximum GSH depletions were
Tumor profile of novel p53 heterozygous Tg.AC (v-Ha-ras) bitransgenic mice treated with benzo(a)pyrene and fed dietary N-acetyl-L-cysteine (NAC).
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We designed a novel short-term bitransgenic model to better characterize the effects of benzo(a)pyrene (BP) exposure on multi-organ carcinogenesis and to evaluate the effects of a well-recognized antioxidant, N-acetyl-L-cysteine (NAC), on neoplasia. We selected the p53 heterozygous Tg.AC (v-Ha-ras)
Effects of a potato cysteine proteinase inhibitor on midgut proteolytic enzyme activity and growth of the southern corn rootworm, Diabrotica undecimpunctata howardi (Coleoptera: Chrysomelidae).
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The major proteinase activity in extracts of larval midguts from the southern corn rootworm (SCR), Diabrotica undecimpunctata howardi, was identified as a cysteine proteinase that prefers substrates containing an arginine residue in the P1 position. Gelatin-zymogram analysis of the midgut
Deliberate ROS production and auxin synergistically trigger the asymmetrical division generating the subsidiary cells in Zea mays stomatal complexes.
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Subsidiary cell generation in Poaceae is an outstanding example of local intercellular stimulation. An inductive stimulus emanates from the guard cell mother cells (GMCs) towards their laterally adjacent subsidiary cell mother cells (SMCs) and triggers the asymmetrical division of the latter.
Association of a 33-kilodalton cysteine proteinase found in corn callus with the inhibition of fall armyworm larval growth.
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Protein patterns of callus from corn (Zea mays L.) inbreds that are either resistant or susceptible to fall armyworm (Spodoptera frugiperda [J.E. Smith]) were analyzed by two-dimensional electrophoresis. Fall armyworm larvae reared on callus initiated from resistant inbreds were significantly
A conserved cysteine residue is involved in disulfide bond formation between plant plasma membrane aquaporin monomers.
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AQPs (aquaporins) are conserved in all kingdoms of life and facilitate the rapid diffusion of water and/or other small solutes across cell membranes. Among the different plant AQPs, PIPs (plasma membrane intrinsic proteins), which fall into two phylogenetic groups, PIP1 and PIP2, play key roles in
A Ca(2+)-dependent cysteine protease is associated with anoxia-induced root tip death in maize.
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Imposition of anoxia on maize (Zea mays cv. B73) seedlings for 48 h or longer led to the death of the root tip. The necrosis extended into the root axis during postanoxic treatment, leading to the mortality of 30-50% of the seedlings. Using zymography, protease profiles in the root tissues of anoxic
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