Similar Datasets
Project description:Epigenetic inheritance during DNA replication requires an orchestrated assembly of nucleosomes from parental and newly synthesized histones. We analyzed Drosophila HisC mutant embryos harboring a deletion of all canonical histone genes, in which nucleosome assembly relies on parental histones from cell cycle 14 onwards. Lack of new histone synthesis and parental histone recycling leads to more accessible chromatin and reduced nucleosome occupancy. This leads to upregulated and spurious transcription, whereas the control of the developmental transcriptional program is partially maintained. Importantly, the genomic positions of modified parental H2A, H2B, and H3 are restored during DNA replication. Therefore, the results suggest that parental histones with active or repressive marks are recycled to preserve the epigenetic landscape during DNA replication in vivo.
2022-12-27 | GSE203474 | GEO
Project description:Epigenetic inheritance during DNA replication requires an orchestrated assembly of nucleosomes from parental and newly synthesized histones. We analyzed Drosophila HisC mutant embryos harboring a deletion of all canonical histone genes, in which nucleosome assembly relies on parental histones from cell cycle 14 onwards. Lack of new histone synthesis and parental histone recycling leads to more accessible chromatin and reduced nucleosome occupancy. This leads to upregulated and spurious transcription, whereas the control of the developmental transcriptional program is partially maintained. Importantly, the genomic positions of modified parental H2A, H2B, and H3 are restored during DNA replication. Therefore, the results suggest that parental histones with active or repressive marks are recycled to preserve the epigenetic landscape during DNA replication in vivo.
2022-12-27 | GSE203477 | GEO
Project description:Epigenetic inheritance during DNA replication requires an orchestrated assembly of nucleosomes from parental and newly synthesized histones. We analyzed Drosophila HisC mutant embryos harboring a deletion of all canonical histone genes, in which nucleosome assembly relies on parental histones from cell cycle 14 onwards. Lack of new histone synthesis and parental histone recycling leads to more accessible chromatin and reduced nucleosome occupancy. This leads to upregulated and spurious transcription, whereas the control of the developmental transcriptional program is partially maintained. Importantly, the genomic positions of modified parental H2A, H2B, and H3 are restored during DNA replication. Therefore, the results suggest that parental histones with active or repressive marks are recycled to preserve the epigenetic landscape during DNA replication in vivo.
2022-12-27 | GSE203476 | GEO
Project description:Epigenetic inheritance during DNA replication requires an orchestrated assembly of nucleosomes from parental and newly synthesized histones. We analyzed Drosophila HisC mutant embryos harboring a deletion of all canonical histone genes, in which nucleosome assembly relies on parental histones from cell cycle 14 onwards. Lack of new histone synthesis and parental histone recycling leads to more accessible chromatin and reduced nucleosome occupancy. This leads to upregulated and spurious transcription, whereas the control of the developmental transcriptional program is partially maintained. Importantly, the genomic positions of modified parental H2A, H2B, and H3 are restored during DNA replication. Therefore, the results suggest that parental histones with active or repressive marks are recycled to preserve the epigenetic landscape during DNA replication in vivo.
2022-12-27 | GSE203473 | GEO
Project description:Epigenetic inheritance during DNA replication requires an orchestrated assembly of nucleosomes from parental and newly synthesized histones. We analyzed Drosophila HisC mutant embryos harboring a deletion of all canonical histone genes, in which nucleosome assembly relies on parental histones from cell cycle 14 onwards. Lack of new histone synthesis and parental histone recycling leads to more accessible chromatin and reduced nucleosome occupancy. This leads to upregulated and spurious transcription, whereas the control of the developmental transcriptional program is partially maintained. Importantly, the genomic positions of modified parental H2A, H2B, and H3 are restored during DNA replication. Therefore, the results suggest that parental histones with active or repressive marks are recycled to preserve the epigenetic landscape during DNA replication in vivo.
2022-12-27 | GSE203471 | GEO
Project description:Chromatin organization is disrupted genome-wide during DNA replication. On newly synthesized DNA, nucleosomes are assembled from new naive histones and old modified histones. It remains unknown whether the landscape of histone post-translational modifications (PTMs) is faithfully copied during DNA replication or the epigenome is perturbed. Here we develop chromatin occupancy after replication (ChOR-seq) to determine histone PTM occupancy immediately after DNA replication and across the cell cycle. We show that H3K4me3, H3K36me3, H3K79me3, and H3K27me3 positional information is reproduced with high accuracy on newly synthesized DNA through histone recycling. Quantitative ChOR-seq reveals that de novo methylation to restore H3K4me3 and H3K27me3 levels occurs across the cell cycle with mark- and locus-specific kinetics. Collectively, this demonstrates that accurate parental histone recycling preserves positional information and allows PTM transmission to daughter cells while modification of new histones gives rise to complex epigenome fluctuations across the cell cycle that could underlie cell-to-cell heterogeneity.
| S-EPMC6202308 | biostudies-literature
Project description:This SuperSeries is composed of the SubSeries listed below.
2018-08-23 | GSE110354 | GEO
Project description:Chromatin organisation is disrupted genome wide during DNA replication. On newly synthesized DNA, nucleosomes are assembled from new naïve histones and old modified histones. It remains unknown whether the landscape of histone post-translational modifications (PTMs) is copied during DNA replication or the epigenomeis perturbed. Here we develop Chromatin Occupancy after Replication, ChOR-seq, a technology that combines chromatin immunopreciptation of histone marks and purification of newly replicated DNA by streptavidin pull-down followed by next generation sequencing. We use this technology to address propagation of epigenetic states across cell division and reveal that accurate recycling of modified parental histones ensures that positional information of histone marks is faithfully reproduced on daughter strands and inherited to daughter cells.
2018-08-23 | GSE110352 | GEO
Project description:Chromatin organisation is disrupted genome wide during DNA replication. On newly synthesized DNA, nucleosomes are assembled from new naïve histones and old modified histones. It remains unknown whether the landscape of histone post-translational modifications (PTMs) is copied during DNA replication or the epigenomeis perturbed. Here we develop Chromatin Occupancy after Replication, ChOR-seq, a technology that combines chromatin immunopreciptation of histone marks and purification of newly replicated DNA by streptavidin pull-down followed by next generation sequencing. We use this technology to address propagation of epigenetic states across cell division and reveal that accurate recycling of modified parental histones ensures that positional information of histone marks is faithfully reproduced on daughter strands and inherited to daughter cells.
2018-08-23 | GSE116310 | GEO
Project description:Chromatin organisation is disrupted genome wide during DNA replication. On newly synthesized DNA, nucleosomes are assembled from new naïve histones and old modified histones. It remains unknown whether the landscape of histone post-translational modifications (PTMs) is copied during DNA replication or the epigenomeis perturbed. Here we develop Chromatin Occupancy after Replication, ChOR-seq, a technology that combines chromatin immunopreciptation of histone marks and purification of newly replicated DNA by streptavidin pull down followed by next generation sequencing. We use this technology to address propagation of epigenetic states across cell division and reveal that accurate recycling of modified parental histones ensures that positional information of histone marks is faithfully reproduced on daughter strands and inherited to daughter cells.
2018-08-23 | GSE110353 | GEO