adenine/arabidopsis

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Determination of ADP-ribosyl cyclase activity, cyclic ADP-ribose, and nicotinic acid adenine dinucleotide phosphate in tissue extracts.

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Cyclic ADP-ribose (cADPR) is a novel second messenger that releases calcium from intracellular stores. Although first shown to release calcium in the sea urchin egg, cADPR has been shown since to be active in a variety of cells and tissues, from plant to human. cADPR stimulates calcium release via

Simple and rapid determination of N(6)-(Δ(2)-isopentenyl)adenine, zeatin, and dihydrozeatin in plants using on-line cleanup liquid chromatography coupled with hybrid quadrupole-Orbitrap high-resolution mass spectrometry.

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A simple and rapid method was developed for the determination of three free cytokinins, namely, N(6)-(Δ(2)-isopentenyl)adenine, zeatin, and dihydrozeatin, in plants using TurboFlow on-line cleanup liquid chromatography combined with hybrid quadrupole-Orbitrap high-resolution mass spectrometry. The

Expression of a plastidic ATP/ADP transporter gene in Escherichia coli leads to a functional adenine nucleotide transport system in the bacterial cytoplasmic membrane.

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Recently, a second type of eucaryotic adenine nucleotide transporter located in the inner envelope membrane of higher plants has been identified at the molecular level (Neuhaus, H. E., Thom, E., Möhlmann, T., Steup, M., and Kampfenkel, K. (1997) Plant J. 11, 73-82). Here we have analyzed the

Hydrolytic cleavage of N6-substituted adenine derivatives by eukaryotic adenine and adenosine deaminases.

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Homogeneous adenine deaminases (EC 3.5.4.2) from the yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe and a putative ADA (adenosine deaminase; EC 3.5.4.4) from Arabidopsis thaliana were obtained for the first time as purified recombinant proteins by molecular cloning of the

Adenine nucleotide pool perturbation is a metabolic trigger for AMP deaminase inhibitor-based herbicide toxicity.

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AMP deaminase (AMPD) is essential for plant life, but the underlying mechanisms responsible for lethality caused by genetic and herbicide-based limitations in catalytic activity are unknown. Deaminoformycin (DF) is a synthetic modified nucleoside that is taken up by plant cells and 5'-phosphorylated

Identification and characterization of interactions between abscisic acid and mitochondrial adenine nucleotide translocators.

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ABA (abscisic acid) is a plant hormone involved in important processes including development and stress responses. Recent reports have identified a number of plant ABA receptors and transporters, highlighting novel mechanisms of ABA action. In the present paper we describe application of a chemical

Phenyl-adenine, identified in a LIGHT-DEPENDENT SHORT HYPOCOTYLS4-assisted chemical screen, is a potent compound for shoot regeneration through the inhibition of CYTOKININ OXIDASE/DEHYDROGENASE activity.

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In vitro shoot regeneration is implemented in basic plant research and commercial plant production, but for some plant species, it is still difficult to achieve by means of the currently available cytokinins and auxins. To identify novel compounds that promote shoot regeneration, we screened a

Mapping in vivo protein-DNA interactions in plants by DamID, a DNA adenine methylation-based method.

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DamID (DNA adenine methylation identification) is an adenine methylation-based tagging method designed to map protein-DNA interactions in vivo. DamID, an alternative method to chromatin immunoprecipitation (ChIP), is based on the covalent linking of a "fingerprint" in the vicinity of the DNA-binding

A novel twist on molecular interactions between thioredoxin and nicotinamide adenine dinucleotide phosphate-dependent thioredoxin reductase.

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The ubiquitous disulfide reductase thioredoxin (Trx) regulates several important biological processes such as seed germination in plants. Oxidized cytosolic Trx is regenerated by nicotinamide adenine dinucleotide phosphate (NADPH)-dependent thioredoxin reductase (NTR) in a multistep transfer of

A complete cDNA for adenine phosphoribosyltransferase from Arabidopsis thaliana.

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An intact cDNA from Arabidopsis thaliana for adenine phosphoribosyltransferase (APRT) was isolated and sequenced. The cDNA is 729 nucleotides in length and predicts a protein of Mr 27,140. The deduced amino acid sequence has been compared with those of other APRTs and shown to be most similar to the

The gene for domains rearranged methyltransferase (DRM2) in Arabidopsis thaliana plants is methylated at both cytosine and adenine residues.

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The methylation patterns of cytosine and adenine residues in the Arabidopsis thaliana gene for domains rearranged methyltransferase (DRM2) were studied in wild-type and several transgene plant lines containing antisense fragments of the cytosine DNA-methyltransferase gene METI under the control of

Flavin Adenine Dinucleotide and N5 ,N10 -Methenyltetrahydrofolate are the in planta Cofactors of Arabidopsis thaliana Cryptochrome 3.

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Members of the cryptochrome/photolyase family (CPF) of proteins utilize noncovalently bound light-absorbing cofactors for their biological function. Usually, the identity of these cofactors is determined after expression in heterologous systems leaving the question unanswered whether these cofactors

The adenine phosphoribosyltransferase-encoding gene of Arabidopsis thaliana.

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The apt gene, coding for adenine phosphoribosyltransferase (APRT), has been isolated from the plant Arabidopsis thaliana. Data from both Southern analysis and characterization of apt clones isolated from a genomic library is consistent with the occurrence of one apt within the A. thaliana genome.

A second form of adenine phosphoribosyltransferase in Arabidopsis thaliana with relative specificity towards cytokinins.

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Adenine phosphoribosyltransferase (APRTase) is an important enzyme for its ability to convert adenine, a byproduct of many biochemical reactions, into AMP. By functional complementation of an Escherichia coli mutant, cDNAs encoding two APRTases have been cloned from Arabidopsis thaliana. One of the

Positive selection for male-sterile mutants of Arabidopsis lacking adenine phosphoribosyl transferase activity.

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Three mutants of Arabidopsis thaliana deficient in adenine phosphoribosyl transferase activity were isolated by selecting for germination of seeds on a medium containing 0.1 millimolar 2,6-diaminopurine. In each of the mutants, diaminopurine resistance was due to a recessive nuclear mutation at a

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