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Glutathione-indole-3-acetonitrile is required for camalexin biosynthesis in Arabidopsis thaliana.

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Camalexin, a major phytoalexin in Arabidopsis thaliana, consists of an indole ring and a thiazole ring. The indole ring is produced from Trp, which is converted to indole-3-acetonitrile (IAN) by CYP79B2/CYP79B3 and CYP71A13. Conversion of Cys(IAN) to dihydrocamalexic acid and subsequently to

The multifunctional enzyme CYP71B15 (PHYTOALEXIN DEFICIENT3) converts cysteine-indole-3-acetonitrile to camalexin in the indole-3-acetonitrile metabolic network of Arabidopsis thaliana.

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Accumulation of camalexin, the characteristic phytoalexin of Arabidopsis thaliana, is induced by a great variety of plant pathogens. It is derived from Trp, which is converted to indole-3-acetonitrile (IAN) by successive action of the cytochrome P450 enzymes CYP79B2/B3 and CYP71A13. Extracts from

Occurrence and formation of indole-3-acetamide in Arabidopsis thaliana.

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An HPLC/GC-MS/MS technique (high-pressure liquid chromatography in combination with gas chromatography-tandem mass spectrometry) has been worked out to analyze indole-3-acetamide (IAM) with very high sensitivity, using isotopically labelled IAM as an internal standard. Using this technique, the

Chlorinated Auxins-How Does Arabidopsis Thaliana Deal with Them?

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Plant hormones have various functions in plants and play crucial roles in all developmental and differentiation stages. Auxins constitute one of the most important groups with the major representative indole-3-acetic acid (IAA). A halogenated derivate of IAA, 4-chloro-indole-3-acetic acid

Indole-3-acetonitrile production from indole glucosinolates deters oviposition by Pieris rapae.

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Like many crucifer-specialist herbivores, Pieris rapae uses the presence of glucosinolates as a signal for oviposition and larval feeding. Arabidopsis thaliana glucosinolate-related mutants provide a unique resource for studying the in vivo role of these compounds in affecting P. rapae oviposition.

Transgenic tobacco plants expressing the Arabidopsis thaliana nitrilase II enzyme.

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Nitrilase (E.C. 3.5.5.1) cloned from Arabidopsis thaliana converts indole-3-acetonitrile to the plant growth hormone, indole-3-acetic acid in vitro. To probe the capacity of ths enzyme under physiological conditions in vivo, the cDNA PM255, encoding nitrilase II, was stably integrated into the

Indole-3-acetic acid is synthesized from L-tryptophan in roots of Arabidopsis thaliana.

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The promoter of the nit1 gene, encoding the predominantly expressed isoform of the Arabidopsis thaliana (L.) Heynh. nitrilase isoenzyme family, fused to the beta-glucuronidase gene (uidA) drives beta-glucuronidase expression in the root system of transgenic A. thaliana and tobacco plants. This

Indole acetonitrile-sensitivity of transgenic tobacco containing Arabidopsis thaliana nitrilase genes.

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The Arabidopsis thaliana genome has four nitrilase (nitrile aminohydrolase, EC 3.5.5.1) genes (NIT1 to NIT4). These nitrilases catalyze hydrolysis of indole-3-acetonitrile (IAN) to indole-3-acetic acid (IAA). Growth of A. thaliana is inhibited by IAN probably due to hydrolysis of IAN to IAA, while

IAA-synthase, an enzyme complex from Arabidopsis thaliana catalyzing the formation of indole-3-acetic acid from (S)-tryptophan.

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An enzyme complex was isolated from Arabidopsis thaliana that catalyzes the entire pathway of biosynthesis of the major plant growth hormone, indole-3-acetic acid (IAA), from (S)-tryptophan. The 160-180 kDa, soluble complex catalyzes a strictly O2-dependent reaction which requires no further added

Differential regulation of an auxin-producing nitrilase gene family in Arabidopsis thaliana.

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Nitrilases (nitrile aminohydrolase, EC 3.5.5.1) convert nitriles to carboxylic acids. We report the cloning, characterization, and expression patterns of four Arabidopsis thaliana nitrilase genes (NIT1-4), one of which was previously described [Bartling, D., Seedorf, M., Mithöfer, A. & Weiler, E. W.

Structure of the gene encoding nitrilase 1 from Arabidopsis thaliana.

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The nitrilases of Arabidopsis thaliana (At) catalyze the conversion of indole-3-acetonitrile (IAN) to indole-3-acetic acid (IAA), thus controlling the last step of auxin biosynthesis. A full-length genomic clone encoding the complete cluster of the At nitrilases 1 to 3 (NIT1-3), including the

A role for nitrilase 3 in the regulation of root morphology in sulphur-starving Arabidopsis thaliana.

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Arabidopsis thaliana expresses four nitrilases, three of which (NIT1, NIT2 and NIT3) are able to convert indole-3-acetonitrile to indole-3-acetic acid (IAA), the plant growth hormone, while the isozyme NIT4 is a beta-cyano-l-alanine hydratase/nitrilase. NIT3 promoter activity is marginal in leaves

Molecular characterization of two cloned nitrilases from Arabidopsis thaliana: key enzymes in biosynthesis of the plant hormone indole-3-acetic acid.

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As in maize [Wright, A.D., Sampson, M. B., Neuffer, M. G., Michalczuk, L., Slovin, J. P. & Cohen, J. D. (1991) Science 254, 998-1000], the major auxin of higher plants, indole-3-acetic acid, is synthesized mainly via a nontryptophan pathway in Arabidopsis thaliana [Normanly, J., Cohen, J. D. & Fink,

Cloning and expression of an Arabidopsis nitrilase which can convert indole-3-acetonitrile to the plant hormone, indole-3-acetic acid.

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From an Arabidopsis thaliana cDNA expression library, a cDNA clone was isolated, characterized and sequenced which, at the amino acid level, resembled the Klebsiella ozaenae bromoxynil nitrilase encoded by the bxn gene. The cDNA contained a long open reading frame, starting from two possible

Indolic constituents and indole-3-acetic acid biosynthesis in the wild-type and a tryptophan auxotroph mutant of Arabidopsis thaliana.

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The tryptophan auxotroph mutant trp3-1 of Arabidopsis thaliana (L.) Heynh., despite having reduced levels of L-tryptophan, accumulates the tryptophan-derived glucosinolate, glucobrassicin and, thus, does not appear to be tryptophan-limited. However, due to the block in tryptophan synthase, the

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