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ornithine/arabidopsis thaliana
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[Analysis of transcriptional activity of the ornithine-delta-aminotransferase gene promoter in Arabidopsis thaliana].
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Cloning of the Arabidopsis thaliana genomic DNA fragment presumably corresponding to the promoter region of the ornithine-delta-aminotransferase (OAT) gene is reported. The reporter-gene construct, containing the Escherichia coli beta-glucouronidase gene under control of the OAT gene promoter was
Isolation of the ornithine-delta-aminotransferase cDNA and effect of salt stress on its expression in Arabidopsis thaliana.
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To evaluate the relative importance of ornithine (Orn) as a precursor in proline (Pro) synthesis, we isolated and sequenced a cDNA encoding the Orn-delta-aminotransferase (delta-OAT) from Arabidopsis thaliana. The deduced amino acid sequence showed high homology with bacterial, yeast, mammalian, and
Functional characterization of an ornithine cyclodeaminase-like protein of Arabidopsis thaliana.
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BACKGROUND
In plants, proline synthesis occurs by two enzymatic steps starting from glutamate as a precursor. Some bacteria, including bacteria such as Agrobacterium rhizogenes have an Ornithine Cyclodeaminase (OCD) which can synthesize proline in a single step by deamination of ornithine. In A.
Over-expression of a tomato N-acetyl-L-glutamate synthase gene (SlNAGS1) in Arabidopsis thaliana results in high ornithine levels and increased tolerance in salt and drought stresses.
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A single copy of the N-acetyl-L-glutamate synthase gene (SlNAGS1) has been isolated from tomato. The deduced amino acid sequence consists of 604 amino acids and shows a high level of similarity to the predicted Arabidopsis NAGS1 and NAGS2 proteins. Furthermore, the N-terminus ArgB domain and the
Ornithine: the overlooked molecule in the regulation of polyamine metabolism.
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We overexpressed a mouse ornithine decarboxylase gene under the control of a constitutive and an estradiol-inducible promoter in Arabidopsis thaliana to increase our understanding of the regulation of polyamine metabolism. Of particular interest was the role of the substrate ornithine not only in
cDNA cloning of two isoforms of ornithine carbamoyltransferase from Canavalia lineata leaves and the effect of site-directed mutagenesis of the carbamoyl phosphate binding site.
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The immunoscreening method was used to isolate cDNAs of 1323 bp (ClOCT1) and 1433 bp (ClOCT2) encoding two ornithine carbamoyltransferases (OCT, EC 2.1.3.3) from the cDNA expression library of Canavalia lineata leaves constructed in a lambdaZAP Express vector. ClOCT1 and ClOCT2 encode 359 and 369
Genomic structure of ornithine carbamoyltransferase gene from Canavalia lineata.
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The nucleotide sequences of the complete ornithine carbamoyltransferase (OCT) gene containing 3,964 bp 3' region and 1,701 bp promoter region were determined from Canavalia lineata leaves. The exons range in size from 131 bp to 390 bp, while the introns range in size from 102 bp to the relatively
Expression pattern of a nuclear encoded mitochondrial arginine-ornithine translocator gene from Arabidopsis.
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BACKGROUND
Arginine and citrulline serve as nitrogen storage forms, but are also involved in biosynthetic and catabolic pathways. Metabolism of arginine, citrulline and ornithine is distributed between mitochondria and cytosol. For the shuttle of intermediates between cytosol and mitochondria
Acetylglutamate kinase is required for both gametophyte function and embryo development in Arabidopsis thaliana.
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The specific functions of the genes encoding arginine biosynthesis enzymes in plants are not well characterized. We report the isolation and characterization of Arabidopsis thaliana N-acetylglutamate kinase (NAGK), which catalyzes the second step of arginine biosynthesis. NAGK is a plastid-localized
Heterospecific cloning of Arabidopsis thaliana cDNAs by direct complementation of pyrimidine auxotrophic mutants of Saccharomyces cerevisiae. I. Cloning and sequence analysis of two cDNAs catalysing the second, fifth and sixth steps of the de novo pyrimidine biosynthesis pathway.
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An Arabidopsis thaliana cDNA library was used to complement Saccharomyces cerevisiae pyrimidine auxotrophic mutants. Mutants in all but one (carbamylphosphate synthetase) of the six steps in the de novo pyrimidine biosynthetic pathway could be complemented. We report here the cloning, sequencing and
Role of Arginine decarboxylase (ADC) in Arabidopsis thaliana defence against the pathogenic bacterium Pseudomonas viridiflava.
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Polyamine biosynthesis starts with putrescine production through the decarboxylation of arginine or ornithine. In Arabidopsis thaliana, putrescine is synthesised exclusively by arginine decarboxylase (ADC), which exists as two isoforms (ADC1 and 2) that are differentially regulated by abiotic
Involvement of the Putative N-Acetylornithine Deacetylase from Arabidopsis thaliana in Flowering and Fruit Development.
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In eukaryotic cells, the non-proteinogenic amino acid ornithine is the precursor of arginine and polyamines (PAs). The final step of ornithine biosynthesis occurs in plants via a cyclic pathway catalyzed by N(2)-acetylornithine:N-acetylglutamate acetyltransferase (NAOGAcT). An alternative route for
The Arabidopsis N-Acetylornithine Deacetylase Controls Ornithine Biosynthesis via a Linear Pathway with Downstream Effects on Polyamine Levels.
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Arabidopsis thaliana At4g17830 codes for a protein showing sequence similarity with the Escherichia coli N-acetylornithine deacetylase (EcArgE), an enzyme implicated in the linear ornithine (Orn) biosynthetic pathway. In plants, N-acetylornithine deacetylase (NAOD) activity has yet to be
OTC and AUL1, two convergent and overlapping genes in the nuclear genome of Arabidopsis thaliana.
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In contrast to bacterial, fungal and vertebrate ornithine transcarbamylases (OTCs; EC 2.1.3.3), very little is known about the enzyme in plants. We report here the isolation of a T-DNA-tagged mutant displaying sensitivity to ornithine, whose characterization has allowed for the identification of
Mitochondrial transporters for ornithine and related amino acids: a review.
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Among the members of the mitochondrial carrier family, there are transporters that catalyze the translocation of ornithine and related substrates, such as arginine, homoarginine, lysine, histidine, and citrulline, across the inner mitochondrial membrane. The mitochondrial carriers ORC1, ORC2, and
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