chitinase/arabidopsis

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GreinarKlínískar rannsóknirEinkaleyfi

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Dissecting the role of CHITINASE-LIKE1 in nitrate-dependent changes in root architecture.

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The root phenotype of an Arabidopsis (Arabidopsis thaliana) mutant of CHITINASE-LIKE1 (CTL1), called arm (for anion-related root morphology), was previously shown to be conditional on growth on high nitrate, chloride, or sucrose. Mutants grown under restrictive conditions displayed inhibition of

BjMYB1, a transcription factor implicated in plant defence through activating BjCHI1 chitinase expression by binding to a W-box-like element.

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We previously identified the W-box-like-4 (Wbl-4) element (GTAGTGACTCAT), one of six Wbl elements in the BjC-P promoter of the unusual chitinase gene BjCHI1 from Brassica juncea, as the core element responsive to fungal infection. Here, we report the isolation and characterization of the cognate

Arabidopsis thaliana class IV chitinase is early induced during the interaction with Xanthomonas campestris.

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Endochitinases are widely distributed among higher plants, including a number of important crop species. They are generally considered to be involved in plant defence against potential pathogens. We have cloned a class IV chitinase gene (AtchitIV) from Arabidopsis thaliana. Southern blot analysis

Effect of chitinase antisense RNA expression on disease susceptibility of Arabidopsis plants.

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Chitinases accumulate in higher plants upon pathogen attack are capable of hydrolyzing chitin-containing fungal cell walls and are thus implicated as part of the plant defense response to fungal pathogens. To evaluate the relative role of the predominate chitinase (class I, basic enzyme) of

Purification, cDNA cloning, and characterization of plant chitinase with a novel domain combination from lycophyte Selaginella doederleinii.

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Chitinase-A from a lycophyte Selaginella doederleinii (SdChiA), having molecular mass of 53 kDa, was purified to homogeneity by column chromatography. The cDNA encoding SdChiA was cloned by rapid amplification of cDNA ends and polymerase chain reaction. It consisted of 1477 nucleotides and its open

Crystal structures and inhibitor binding properties of plant class V chitinases: the cycad enzyme exhibits unique structural and functional features.

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A class V (glycoside hydrolase family 18) chitinase from the cycad Cycas revoluta (CrChiA) is a plant chitinase that has been reported to possess efficient transglycosylation (TG) activity. We solved the crystal structure of CrChiA, and compared it with those of class V chitinases from Nicotiana

[Heterologous expression and functional identification of a chitinase gene from wheat].

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Chitinases are functional in plant defense against pathogens and also involved in plant development as well as human disease responses. In this study a chitinase gene, Wch2, from wheat was expressed transiently in tobacco leaves and stably in transgenic Arabidopsis thaliana plants to evaluate its

Nucleotide polymorphism in the acidic chitinase locus (ChiA) region of the wild plant Arabidopsis thaliana.

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To investigate DNA variation in natural plant populations, a 1.8-kb region of the acidic chitinase locus (ChiA)was analyzed for 17 ecotypes of Arabidopsis thaliana sampled worldwide and 3 Arabis species in Japan. As in the Adh region, dimorphism was detected throughout the investigated ChiA region,

Isolation and Characterization of the Genes Encoding Basic and Acidic Chitinase in Arabidopsis thaliana.

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Plants synthesize a number of antimicrobial proteins in response to pathogen invasion and environmental stresses. These proteins include two classes of chitinases that have either basic or acidic isoelectric points and that are capable of degrading fungal cell wall chitin. We have cloned and

Introduction of a tryptophan side chain into subsite +1 enhances transglycosylation activity of a GH-18 chitinase from Arabidopsis thaliana, AtChiC.

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A tryptophan side chain was introduced into subsite +1 of family GH-18 (class V) chitinases from Nicotiana tabacum and Arabidopsis thaliana (NtChiV and AtChiC, respectively) by the mutation of a glycine residue to tryptophan (G74W-NtChiV and G75W-AtChiC). The specific activity toward glycol chitin

DNA variation in the basic chitinase locus (ChiB) region of the wild plant Arabidopsis thaliana.

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Nucleotide variation in a 2.2-kbp region of basic chitinase (ChiB) locus in 17 ecotypes of Arabidopsis thaliana was compared with previously investigated regions to investigate genetic mechanisms acting on DNA polymorphism. In the ChiB region, dimorphic DNA variation was detected, as in the Adh and

Effect of Urtica dioica agglutinin and Arabidopsis thaliana Chia4 chitinase on the protozoan Phytomonas françai.

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The genus Phytomonas is responsible for many diseases in different crop plant species. The finding that chitin is an exposed cell surface polysaccharide in Phytomonas françai and the observation that chitinases can inhibit fungal growth raises expectations about the potential effect of plant

CHITINASE LIKE1 Regulates Root Development of Dark-Grown Seedlings by Modulating Ethylene Biosynthesis in Arabidopsis thaliana.

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The plant hormone ethylene plays a regulatory role in development in light- and dark-grown seedlings. We previously isolated a group of small-molecule compounds with a quinazolinone backbone, which were named acsinones (for ACC synthase inhibitor quinazolinones), that act as uncompetitive inhibitors

Purification and Characterization of an Antifungal Chitinase from Arabidopsis thaliana.

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Plants exhibit an altered pattern of protein synthesis in response to pathogen invasion and abiotic stress. One of these ;pathogenesis-related' proteins has been identified as chitinase, which is capable of inhibiting fungal growth in vitro. This observation has led to the suggestion that the in

A class V chitinase from Arabidopsis thaliana: gene responses, enzymatic properties, and crystallographic analysis.

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Expression of a class V chitinase gene (At4g19810, AtChiC) in Arabidopsis thaliana was examined by quantitative real-time PCR and by analyzing microarray data available at Genevestigator. The gene expression was induced by the plant stress-related hormones abscisic acid (ABA) and jasmonic acid (JA)

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