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Pàgina 1 des de 69 resultats
Two combinatorial patterns of telomere histone marks in plants with canonical and non-canonical telomere repeats.
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Telomeres, nucleoprotein structures at the ends of linear eukaryotic chromosomes, are crucial for the maintenance of genome integrity. In most plants, telomeres consist of conserved tandem repeat units comprising the TTTAGGG motif. Recently, non-canonical telomeres were described in several plants
Cytokinin controls the cell cycle at mitosis by stimulating the tyrosine dephosphorylation and activation of p34cdc2-like H1 histone kinase.
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In excised pith parenchyma from Nicotiana tabacum L. cv. Wisconsin Havana 38, auxin (naphthalene-1-acetic acid) together with cytokinin (6-benzylaminopurine) induced a greater than 40-fold increase in a p34cdc2-like protein, recoverable in the p13suc1-binding fraction, that had high H1 histone
An evolutionary comparison of plant histones.
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Histones were extracted from chromatin of the following: a moss (Polytrichum juniperinum); the primitive vascular plants Psilotum nudum and Equisetum arvense; a fern (Polypodium vulgare); the gymnosperms fir (Abies concolor), yew (Taxus canadensis) and Gingko biloba; the dicotyledonous angiosperms
A novel histone variant localized in nucleoli of higher plant cells.
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Immunofluorescence staining with antisera raised against p35, a basic nuclear protein that accumulates in the pollen nuclei of Lilium longiflorum, specifically stained the nucleoli in interphase nuclei of somatic tissues, including root and leaf, and in pachytene nuclei during meiotic division,
An oncoprotein from the plant pathogen agrobacterium has histone chaperone-like activity.
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Protein 6b, encoded by T-DNA from the pathogen Agrobacterium tumefaciens, stimulates the plant hormone-independent division of cells in culture in vitro and induces aberrant cell growth and the ectopic expression of various genes, including genes related to cell division and meristem-related class 1
The Histone Deacetylase Complex 1 Protein of Arabidopsis Has the Capacity to Interact with Multiple Proteins Including Histone 3-Binding Proteins and Histone 1 Variants.
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Intrinsically disordered proteins can adopt multiple conformations, thereby enabling interaction with a wide variety of partners. They often serve as hubs in protein interaction networks. We have previously shown that the Histone Deacetylase Complex 1 (HDC1) protein from Arabidopsis (Arabidopsis
The "drought-inducible" histone H1s of tobacco play no role in male sterility linked to alterations in H1 variants.
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Tobacco ( Nicotiana tabacum L.) has two major H1 variants (H1A and H1B), which account for over 80% of chromatin linker histones, and four minor variants: H1C, H1D, H1E and H1F. We have shown previously [M. Prymakowska-Bosak et al. (1999) Plant Cell 11:2317-2329] that reversal of the natural
Male gametic cell-specific histone gH2A gene of Lilium longiflorum: genomic structure and promoter activity in the generative cell.
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A genomic clone containing the gH2A gene, a histone variant specifically expressed in male gametic cells within the pollen of Lilium longiflorum, was isolated. Sequence analysis revealed that the coding region of the gene is interrupted by one intron, as is the case with the somatic type of plant
Fractionation and characterization of histones from barley (Hordeum vulgare) leaves : Existence of multiple H2A and H2B variants.
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Histones were extracted from purified nuclei isolated from four cereals,viz. barley (Hordeum vulgare), wheat(Triticum aestivum), Aegilops squarrosa and corn (Zea mais), and from tobacco (Nicotiana tabacum). Analysis of the histones on SDS gels showed complex electrophoretic patterns with one species
A centromeric DNA sequence colocalized with a centromere-specific histone H3 in tobacco.
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Centromeres play an important role in segregating chromosomes into daughter cells, and centromeric DNA assembles specific proteins to form a complex referred to as the kinetochore. Among these proteins, centromere-specific histone H3 (CENH3) is one of the most characterized and found to be located
Conserved epitopes on plant H1 histones recognized by monoclonal antibodies.
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A series of monoclonal antibodies specific for distinct regions of H1 histone from the plant Nicotiana tabacum were obtained from fusion experiments with spleen cells of mice immunized with tobacco nuclear extracts. These monoclonal antibodies were characterized and the evolutionary conservation of
Overexpression of Camellia sinensis H1 histone gene confers abiotic stress tolerance in transgenic tobacco.
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CONCLUSIONS
Overexpression of CsHis in tobacco promoted chromatin condensation, but did not affect the phenotype. It also conferred tolerance to low-temperature, high-salinity, ABA, drought and oxidative stress in transgenic tobacco. H1 histone, as a major structural protein of higher-order
Cell cycle-dependent O-GlcNAc modification of tobacco histones and their interaction with the tobacco lectin.
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The Nicotiana tabacum agglutinin or Nictaba is a nucleocytoplasmic lectin that is expressed in tobacco after the plants have been exposed to jasmonate treatment or insect herbivory. Nictaba specifically recognizes GlcNAc residues. Recently, it was shown that Nictaba is interacting in vitro with the
Interaction of the tobacco lectin with histone proteins.
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The tobacco (Nicotiana tabacum) agglutinin or Nictaba is a member of a novel class of plant lectins residing in the nucleus and the cytoplasm of tobacco cells. Since tobacco lectin expression is only observed after the plant has been subjected to stress situations such as jasmonate treatment or
In vivo interaction between the tobacco lectin and the core histone proteins.
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Nictaba, a lectin accumulating in tobacco (Nicotiana tabacum) leaves treated with jasmonate, is considered to act as a signaling protein in the stress physiology of the plant. Immunolocalization studies revealed that Nictaba has a nucleocytoplasmic localization. In previous research, histones were
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