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Tammar wallaby CENP-A ChIP-seq

ABSTRACT: Chromatin immunoprecipitation from tammar wallaby pouch young cells for DNA bound to CENP-A

ORGANISM(S): Notamacropus eugenii

PROVIDER: GSE30371 | GEO | 2011/07/28

SECONDARY ACCESSION(S): PRJNA154729

REPOSITORIES: GEO

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Tammar wallaby CENP-A ChIP-seq

Project description:Chromatin immunoprecipitation from tammar wallaby pouch young cells for DNA bound to CENP-A Chromatin from one Tammar wallaby cell line, total of two technical replicates, 1/8th plate each, IgG and No Antibody IPs performed but not sequenced

2011-07-28 | E-GEOD-30371 | biostudies-arrayexpress

Unique small RNA signatures uncovered in the tammar wallaby genome [small RNA_seq]

Project description:Small RNA isolation of miRNAs, crasiRNAs and piRNAs for RNAseq from tammar wallaby pouch young

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Unique small RNA signatures uncovered in the tammar wallaby genome [small RNA_seq]

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Transcriptome sequencing in the tammar wallaby unveils conserved gene expression networks underlying reproduction in therian mammals

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Gene expression in the mammary gland of the tammar wallaby during the lactation cycle

Project description:In this study we use microarray technology to identify differentially expressed genes in the tammar wallaby mammary gland during the lactation cycle. We have focused on gene expression changes in the tammar mammary gland as it shifts from one lactation phase to the next.

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CENP-T and CENP-C bridge adjacent CENP-A nucleosomes on young alpha-satellite dimers

Project description:We find that CENP-T acts as a bridge between two well-positioned CENP-A nucleosomes that are present on young alpha-satellite dimers that dominate functional human centromeres. CENP-T is centered over the CENP-B box, where it interacts with the CENP-B/CENP-C complex. Upon cross-linking, the entire CENP-A/CENP-C/CENP-T-containing complex is recovered as a nuclease-protected particle over an alpha-satellite dimer that comprises the fundamental unit of kinetochore chromatin. Our work reveals that CENP-A/CENP-C and CENP-T branches of kinetochore assembly are physically integrated.

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Telomeric repeats facilitate CENP-A incorporation via telomere binding proteins

Project description:The histone H3 variant, CENP-ACnp1, is normally assembled upon canonical centromeric sequences, but there is no apparent obligate coupling of sequence and assembly, suggesting that centromere location can be epigenetically determined. To explore the tolerances and constraints on CENP-ACnp1 deposition we investigated whether certain locations are favoured when additional CENP-ACnp1 is present in fission yeast cells. Our analyses show that additional CENP-ACnp1 accumulates within and close to heterochromatic centromeric outer repeats, and over regions adjacent to rDNA and telomeres. The use of minichromosome derivatives with unique DNA sequences internal to chromosome ends shows that telomeres are sufficient to direct CENP-ACnp1 deposition. However, chromosome ends are not required as CENP-ACnp1 deposition also occurs at telomere repeats inserted at an internal locus and correlates with the presence of H3K9 methylation near these repeats. The Ccq1 protein, which is known to bind telomere repeats and recruit telomerase, was found to be required to induce H3K9 methylation and thus promote the incorporation of CENP-A near telomere repeats. These analyses demonstrate that at non-centromeric chromosomal locations the presence of heterochromatin influences the sites at which CENP-A is incorporated into chromatin and thus, potentially the location of centromeres. For CENP-A/Cnp1 chromatin immunoprecipitation: DNA immunoprecipitated with anti-Cnp1 serum using chromatin extracts from mutants and wild type control cells in biological duplicates normalized to input DNA from each strain.

2013-08-22 | E-GEOD-46427 | biostudies-arrayexpress

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