Chromo
Mostrando 13-24 de 34 artigos, teses e dissertações.
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13. Specificity of the HP1 chromo domain for the methylated N-terminus of histone H3
Recent studies show that heterochromatin-associated protein-1 (HP1) recognizes a ‘histone code’ involving methylated Lys9 (methyl-K9) in histone H3. Using in situ immunofluorescence, we demonstrate that methyl-K9 H3 and HP1 co-localize to the heterochromatic regions of Drosophila polytene chromosomes. NMR spectra show that methyl-K9 binding of HP1 occur
Oxford University Press.
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14. The fission yeast chromo domain encoding gene chp1(+) is required for chromosome segregation and shows a genetic interaction with alpha-tubulin.
In eukaryotes, the segregation of chromosomes is co-ordinated by the centromere and must proceed accurately if aneuploidy and cell death are to be avoided. The fission yeast centromere is complex, containing highly repetitive regions of DNA showing the characteristics of heterochromatin. Two proteins, Swi6p and Clr4p, that are associated with the fission yea
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15. DNA-binding and chromatin localization properties of CHD1.
CHD1 is a novel DNA-binding protein that contains both a chromatin organization modifier (chromo) domain and a helicase/ATPase domain. We show here that CHD1 preferentially binds to relatively long A.T tracts in double-stranded DNA via minor-groove interactions. Several CHD1-binding sites were found in a well-characterized nuclear-matrix attachment region, w
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16. CHD1 is concentrated in interbands and puffed regions of Drosophila polytene chromosomes.
Previously, we reported on the discovery and characterization of a mammalian chromatin-associated protein, CHD1 (chromo-ATPase/helicase-DNA-binding domain), with features that led us to suspect that it might have an important role in the modification of chromatin structure. We now report on the characterization of the Drosophila melanogaster CHD1 homologue (
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17. High conservation of the fine-scale organisation of chromosome 5 between two pathogenic Leishmania species.
In a previous work we showed a remarkable conservation of the general structure of the genome (chromo-some number and synteny) among different pathogenic species of Old World Leishmania, indicating the absence of major interchromosomal rearrangements during evolution. In the present study, we have compared the fine structure of chromo-some 5 among two of the
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18. The chromo domain protein Chd1p from budding yeast is an ATP-dependent chromatin-modifying factor
CHD proteins are members of the chromo domain family, a class of proteins involved in transcription, DNA degradation and chromatin structure. In higher eukaryotes, there are two distinct subfamilies of CHD proteins: CHD1 and CHD3/4. Analyses carried out in vitro indicate that the CHD3/4 proteins may regulate transcription via alteration of chromatin structur
Oxford University Press.
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19. Characterization of the CHD family of proteins
The murine gene CHD1 (MmCHD1) was previously isolated in a search for proteins that bound a DNA promoter element. The presence of chromo (chromatin organization modifier) domains and an SNF2-related helicase/ATPase domain led to speculation that this gene regulated chromatin structure or gene transcription. This study describes the cloning and characterizati
The National Academy of Sciences of the USA.
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20. Chromosomal Distribution of Rapidly Reannealing DNA in Drosophila melanogaster
Cytological hybridization has been used to localize fractions of rapidly reannealing DNA in salivary chromosomes of Drosophila melanogaster. Complementary RNA of high specific activity was transcribed from hydroxyapatite-fractionated rapidly reannealing sequences and from selected buoyant-density fractions of total DNA. It was then hybridized to chromosome s
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21. RegulonDB (version 3.2): transcriptional regulation and operon organization in Escherichia coli K-12
RegulonDB is a database on mechanisms of transcription regulation and operon organization in Escherichia coli K-12. The current version has considerably increased numbers of regulatory elements such as promoters, binding sites and terminators. The complete repertoire of known and predicted DNA-binding transcriptional regulators can be considered to be i
Oxford University Press.
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22. Heterochromatin Protein 1 Is Extensively Decorated with Histone Code-like Post-translational Modifications *
Heterochromatin protein 1 (HP1) family members (α, β, and γ) bind histone H3 methylated at Lys-9, leading to gene silencing and heterochromatin formation. Several previous reports have suggested that HP1s are post-translationally modified, yet sites of modification have not yet been exhaustively determined. Here we perform the first comprehensive proteomi
The American Society for Biochemistry and Molecular Biology.
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23. Tetrahymena micronuclear sequences that function as telomeres in yeast.
We explored the ability of S. cerevisiae to utilize heterologous DNA sequences as telomeres by cloning germline (micronuclear) DNA from Tetrahymena thermophila on a linear yeast plasmid that selects for telomere function. The only Tetrahymena sequences that functioned in this assay were (C4A2)n repeats. Moreover, these repeats did not have to be derived from
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24. Directional bias during mating type switching in Saccharomyces is independent of chromosomal architecture
Haploid Saccharomyces cells have the remarkable potential to change mating type as often as every generation, a process accomplished by an intrachromosomal gene conversion between an expressor locus MAT and one of two repositories of mating type information, HML or HMR. The particular locus selected as donor is dictated by the mating type of the cell, a bias
Oxford University Press.