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una/arabidopsis thaliana
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Isolation and Characterization of a Mutant of Arabidopsis thaliana Resistant to alpha-Methyltryptophan.
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Mutants of Arabidopsis thaliana have been selected for resistance to growth inhibition at the seedling stage by alpha-methyltryptophan (aMT). One mutant, amt-1 has been characterized in detail. The appearance and growth rate of the mutant in the absence of the inhibitor are similar to wild type,
Molecular cloning and characterization of GPA1, a G protein alpha subunit gene from Arabidopsis thaliana.
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We have isolated a gene coding for a G protein alpha subunit from the flowering plant Arabidopsis thaliana. This gene, named GPA1, was isolated by using a DNA probe generated by polymerase chain reaction based on protein sequences from mammalian and yeast G protein alpha subunits. The sequences of
Identification and functional expression in yeast of a prenylcysteine alpha-carboxyl methyltransferase gene from Arabidopsis thaliana.
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Most isoprenylated proteins are alpha-carboxyl-methylated. However, despite numerous studies linking protein isoprenylation in plants to cell cycle control, meristem development, and phytohormone signaling, alpha-carboxyl methylation of isoprenylated plant proteins has not been characterized in
Importin alpha from Arabidopsis thaliana is a nuclear import receptor that recognizes three classes of import signals.
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Protein import into the nucleus is a two-step process. In vitro import systems from vertebrate cell extracts have shown several soluble factors are required. One of these factors is the receptor importin alpha, which binds to nuclear localization signals (NLS) in vitro. We previously cloned an
Molecular basis of alpha-methyltryptophan resistance in amt-1, a mutant of Arabidopsis thaliana with altered tryptophan metabolism.
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A mutant of Arabidopsis thaliana, amt-1, was previously selected for resistance to growth inhibition by the tryptophan analog alpha-methyltryptophan. This mutant had elevated tryptophan levels and exhibited higher anthranilate synthase (AS) activity that showed increased resistance to feedback
Characterization of tryptophan synthase alpha subunit mutants of Arabidopsis thaliana.
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Three mutations in the Arabidopsis thaliana gene encoding the alpha subunit of tryptophan synthase were isolated by selection for resistance to 5-methylanthranilate or 5-fluoroindole, toxic analogs of tryptophan pathway intermediates. Plants homozygous for trp3-1 and trp3-2 are light-conditional
Semi-constitutive expression of an Arabidopsis thaliana alpha-tubulin gene.
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In Arabidopsis tissues, the pool of tubulin protein is provided by the expression of multiple alpha-tubulin and beta-tubulin genes. Previous evidence suggested that the TUA2 alpha-tubulin gene was expressed in all organs of mature plants. We now report a more detailed analysis of TUA2 expression
A novel mutation in KNOPF uncovers the role of alpha-glucosidase I during post-embryonic development in Arabidopsis thaliana.
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N-glycosylation is a common protein modification. Joining of polypeptide and carbohydrate elements into hybrid molecules provides an opportunity to fine-tune protein properties. However, the role of N-glycosylation on the development of multicellular organisms remains elusive. Here we report a
Arabidopsis thaliana tryptophan synthase alpha: gene cloning, expression, and subunit interaction.
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The tryptophan synthase alpha subunit catalyzes the conversion of indole-3-glycerolphosphate to indole, the penultimate reaction in the biosynthesis of the essential amino acid tryptophan. A cDNA encoding Arabidopsis thaliana tryptophan synthase alpha(TSA1) was isolated by complementation of an
Secretory phospholipase A2-alpha from Arabidopsis thaliana: functional parameters and substrate preference.
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The secretory phospholipase A2-alpha from Arabidopsis thaliana (AtsPLA2-alpha), being one of the first plant sPLA2s obtained in purified state, has been characterised with respect to substrate preference and optimum conditions of catalysis. The optima of pH, temperature, and calcium concentration
Molecular characterization of a beta-type proteasome subunit from Arabidopsis thaliana co-expressed at a high level with an alpha-type proteasome subunit early in the cell cycle.
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Proteasomes are the essential components of complexes involved in an extralysosomal energy- and ubiquitin-dependent proteolytic pathway. The first alpha-type proteasome subunit in plants has recently been described. In this work, the sequence of the first beta-type proteasome subunit in plants,
Molecular cloning and characterization of Arabidopsis thaliana Golgi alpha-mannosidase II, a key enzyme in the formation of complex N-glycans in plants.
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N-glycosylation is one of the major post-translational modifications of proteins in eukaryotes; however, the processing reactions of oligomannosidic N-glycan precursors leading to hybrid-type and finally complex-type N-glycans are not fully understood in plants. To investigate the role of Golgi
Characterization of the heme environment in Arabidopsis thaliana fatty acid alpha-dioxygenase-1.
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Plant alpha-dioxygenases (PADOX) are hemoproteins in the myeloperoxidase family. We have used a variety of spectroscopic, mutagenic, and kinetic approaches to characterize the heme environment in Arabidopsis thaliana PADOX-1. Recombinant PADOX-1 purified to homogeneity contained 1 mol of heme bound
The alpha-subunit of the heterotrimeric G-protein affects jasmonate responses in Arabidopsis thaliana.
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Heterotrimeric G-proteins have been implicated in having a role in many plant signalling pathways. To understand further the role of G-proteins, a preliminary experiment was performed to assess the impact of the G alpha subunit loss-of-function mutation gpa1-1 on the Arabidopsis transcriptome. The
Modular organization and development activity of an Arabidopsis thaliana EF-1 alpha gene promoter.
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The activity of the Arabidopsis thalana A1 EF-1 alpha gene promoter was analyzed in transgenic Arabidopsis plants. The 5' upstream sequence of the A1 gene and several promoter deletions were fused to the beta-glucuronidase (GUS) coding region. Promoter activity was monitored by quantitative and
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