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Страна 1 од 136 резултати
Molecular identification of catalases from Nicotiana plumbaginifolia (L.).
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We have isolated three different catalase cDNAs from Nicotiana plumbaginifolia (cat1, cat2, and cat3) and a partial sequence of a fourth catalase gene (cat4) that shows no discernible expression based on Northern analysis. The catalase sequences were used to determine the similarity with other plant
Molecular cloning, characterisation and expression of two catalase genes from peach
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Two cDNA clones encoding catalase (Cat1 and Cat2) from peach [Prunus persica (L.) Batsch] were identified, that show homologies to other plant catalases. The nucleotide sequences of the two coding regions showed 88% identity to each other. The amino acid sequences predicted from the two full-length
A bacterial transgene for catalase protects translation of d1 protein during exposure of salt-stressed tobacco leaves to strong light.
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During photoinhibition of photosystem II (PSII) in cyanobacteria, salt stress inhibits the repair of photodamaged PSII and, in particular, the synthesis of the D1 protein (D1). We investigated the effects of salt stress on the repair of PSII and the synthesis of D1 in wild-type tobacco (Nicotiana
Leaf catalase mRNA and catalase-protein levels in a high-catalase tobacco mutant with o(2)-resistant photosynthesis.
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Experiments were conducted with a tobacco (Nicotiana tabacum) mutant with 40 to 50% greater catalase activity than wild type that is associated with a novel form of O(2)-resistant photosynthesis. The apparent K(m) for H(2)O(2) was the same in mutant and wild-type leaf extracts. Tobacco RNAs were
Enhanced-peroxidatic activity in specific catalase isozymes of tobacco, barley, and maize.
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Separation of catalase isozymes from leaf extracts of three diverse plant species (Nicotiana sylvestris, Zea mays, Hordeum vulgare L.) revealed a distinct isozyme with enhanced peroxidatic activity (30-, 70-, 28-fold over typical catalase, respectively) which constituted 10 to 20% of the total
Identification of peroxisomal targeting signal of pumpkin catalase and the binding analysis with PTS1 receptor.
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Many peroxisomal proteins are imported into peroxisomes via recognition of the peroxisomal targeting signal (PTS1) present at the C-termini by the PTS1 receptor (Pex5p). Catalase, a peroxisomal protein, has PTS1-like motifs around or at the C-terminus. However, it remains unclear whether catalase is
Further studies on o(2)-resistant photosynthesis and photorespiration in a tobacco mutant with enhanced catalase activity.
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The increase in net photosynthesis in M(4) progeny of an O(2)-resistant tobacco (Nicotiana tabacum) mutant relative to wild-type plants at 21 and 42% O(2) has been confirmed and further investigated. Self-pollination of an M(3) mutant produced M(4) progeny segregating high catalase phenotypes
Factors affecting expression of enhanced catalase activity in a tobacco mutant with o(2)-resistant photosynthesis.
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Tobacco (Nicotiana tabacum) mutants with 40 to 50% more catalase activity than wild type show O(2)-resistant photosynthesis under conditions of high photorespiration. More than 90% of the population of mutant plants of an M(7) and M(8) generation had enhanced catalase activity, and nearly 40% had
A Salicylic Acid-Binding Activity and a Salicylic Acid-Inhibitable Catalase Activity Are Present in a Variety of Plant Species.
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Recently, it has been demonstrated that the salicylic acid (SA)-binding protein (SABP) from tobacco (Nicotiana tabacum) is a SA-inhibitable catalase (Z. Chen, H. Silva, D.F. Klessig [1993] Science 262: 1883-1886). Here we report the presence of SABP and SA-inhibitable catalase activity in
Molecular cloning, characterization and expression analysis of a catalase cDNA from hot pepper (Capsicum annuum L.).
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We report the cloning of a catalase cDNA from hot pepper (Capsicum annuum L.) and its expression patterns. CaCat1 is consisted of 1837 bp containing one open reading frame (ORF) of 1479 and 45 bp/313 bp of 5'/3'-untranslated region. Deduced amino acid sequence of CaCat1 showed the 95% and 78%
Manipulation of catalase levels produces altered photosynthesis in transgenic tobacco plants.
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Constructs containing the cDNAs encoding the primary leaf catalase in Nicotiana or subunit 1 of cottonseed (Gossypium hirsutum) catalase were introduced in the sense and antisense orientation into the Nicotiana tabacum genome. The N. tabacum leaf cDNA specifically overexpressed CAT-1, the high
The Role of Sugarcane Catalase Gene ScCAT2 in the Defense Response to Pathogen Challenge and Adversity Stress.
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Catalases, which consist of multiple structural isoforms, catalyze the decomposition of hydrogen peroxide in cells to prevent membrane lipid peroxidation. In this study, a group II catalase gene ScCAT2 (GenBank Accession No. KF528830) was isolated from sugarcane genotype Yacheng05-179. ScCAT2
Chilli veinal mottle virus HCPro interacts with catalase to facilitate virus infection in Nicotiana tabacum
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Plant symptoms are derived from specific interactions between virus and host components. However, little is known about viral or host factors that participate in the establishment of systemic necrosis. Here, we showed that helper component proteinase (HCPro) encoded by Chilli veinal mottle virus
Differential expression of catalase genes in Nicotiana plumbaginifolia (L.).
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We have analyzed the expression of three catalase (Cat; EC 1.11.1.6) genes from Nicotiana plumbaginifolia by means of RNA blot and in situ hybridizations. Our data demonstrate that the expression of each catalase is associated with a particular H2O2-producing process. Cat1 appears to be specifically
Regulation of Catalase Activity in Leaves of Nicotiana sylvestris by High CO(2).
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The effect of high CO(2) (1% CO(2)/21% O(2)) on the activity of specific forms of catalase (CAT-1, -2, and -3) (EA Havir, NA McHale [1987] Plant Physiol 84: 450-455) in seedling leaves of tobacco (Nicotiana sylvestris, Nicotlana tabacum) was examined. In high CO(2), total catalase activity decreased
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