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Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome

ABSTRACT: Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome

PROVIDER: PRJNA349042 | ENA |

REPOSITORIES: ENA

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Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome [H3K9me2 ChIP]

Project description:H3K9me2 profiles and Fft3 occupancy in fission yeast. Heterochromatin can be epigenetically inherited in cis, leading to stable maintenance of gene expression states. However, the mechanisms underlying heterochromatin inheritance remain unclear. Here we identify Fft3, a homolog of the mammalian SMARCAD1 Snf2 chromatin remodeler, as a factor uniquely required for heterochromatin inheritance, rather than for de novo assembly. Importantly, we find that Fft3 bound to heterochromatic loci suppresses turnover of parental histones and is critical for the epigenetic transmission of heterochromatin in cycling cells. Surprisingly, Fft3 also localizes to several euchromatic loci where it is required for proper replication progression. Fft3 promotes nucleosome stability at these loci to prevent R-loop formation that can impede replication machinery. Strikingly, overexpression of the Clr4/Suv39h methyltransferase, which is also required for efficient replication through these loci, suppresses phenotypes associated with the loss of Fft3. Thus, we find that Fft3 promotes nucleosome stability to facilitate heterochromatin inheritance and also acts in parallel to Clr4 ensure proper replication of euchromatic regions.

2017-03-21 | GSE88902 | GEO

Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome [H3-FLAG ChIP]

Project description:H3-FLAG incorporation in Schizosaccharomyces pombe Heterochromatin can be epigenetically inherited in cis, leading to stable maintenance of gene expression states. However, the mechanisms underlying heterochromatin inheritance remain unclear. Here we identify Fft3, a homolog of the mammalian SMARCAD1 Snf2 chromatin remodeler, as a factor uniquely required for heterochromatin inheritance, rather than for de novo assembly. Importantly, we find that Fft3 bound to heterochromatic loci suppresses turnover of parental histones and is critical for the epigenetic transmission of heterochromatin in cycling cells. Surprisingly, Fft3 also localizes to several euchromatic loci where it is required for proper replication progression. Fft3 promotes nucleosome stability at these loci to prevent R-loop formation that can impede replication machinery. Strikingly, overexpression of the Clr4/Suv39h methyltransferase, which is also required for efficient replication through these loci, suppresses phenotypes associated with the loss of Fft3. Thus, we find that Fft3 promotes nucleosome stability to facilitate heterochromatin inheritance and also acts in parallel to Clr4 ensure proper replication of euchromatic regions.

2017-03-21 | GSE88901 | GEO

Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome [BrdU IP]

Project description:BrdU profiling of replication activity in hydroxyurea treated synchronous culture of fission yeast. Heterochromatin can be epigenetically inherited in cis, leading to stable maintenance of gene expression states. However, the mechanisms underlying heterochromatin inheritance remain unclear. Here we identify Fft3, a homolog of the mammalian SMARCAD1 Snf2 chromatin remodeler, as a factor uniquely required for heterochromatin inheritance, rather than for de novo assembly. Importantly, we find that Fft3 bound to heterochromatic loci suppresses turnover of parental histones and is critical for the epigenetic transmission of heterochromatin in cycling cells. Surprisingly, Fft3 also localizes to several euchromatic loci where it is required for proper replication progression. Fft3 promotes nucleosome stability at these loci to prevent R-loop formation that can impede replication machinery. Strikingly, overexpression of the Clr4/Suv39h methyltransferase, which is also required for efficient replication through these loci, suppresses phenotypes associated with the loss of Fft3. Thus, we find that Fft3 promotes nucleosome stability to facilitate heterochromatin inheritance and also acts in parallel to Clr4 ensure proper replication of euchromatic regions.

2017-03-21 | GSE88903 | GEO

Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome [HU + BrdU IP]

Project description:BrdU profiling of replication activity in synchronous culture of fission yeast. Heterochromatin can be epigenetically inherited in cis, leading to stable maintenance of gene expression states. However, the mechanisms underlying heterochromatin inheritance remain unclear. Here we identify Fft3, a homolog of the mammalian SMARCAD1 Snf2 chromatin remodeler, as a factor uniquely required for heterochromatin inheritance, rather than for de novo assembly. Importantly, we find that Fft3 bound to heterochromatic loci suppresses turnover of parental histones and is critical for the epigenetic transmission of heterochromatin in cycling cells. Surprisingly, Fft3 also localizes to several euchromatic loci where it is required for proper replication progression. Fft3 promotes nucleosome stability at these loci to prevent R-loop formation that can impede replication machinery. Strikingly, overexpression of the Clr4/Suv39h methyltransferase, which is also required for efficient replication through these loci, suppresses phenotypes associated with the loss of Fft3. Thus, we find that Fft3 promotes nucleosome stability to facilitate heterochromatin inheritance and also acts in parallel to Clr4 ensure proper replication of euchromatic regions.

2017-03-21 | GSE93273 | GEO

SNF2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance and Proper Replication.

Project description:Heterochromatin can be epigenetically inherited in cis, leading to stable gene silencing. However, the mechanisms underlying heterochromatin inheritance remain unclear. Here, we identify Fft3, a fission yeast homolog of the mammalian SMARCAD1 SNF2 chromatin remodeler, as a factor uniquely required for heterochromatin inheritance, rather than for de novo assembly. Importantly, we find that Fft3 suppresses turnover of histones at heterochromatic loci to facilitate epigenetic transmission of heterochromatin in cycling cells. Moreover, Fft3 also precludes nucleosome turnover at several euchromatic loci to prevent R-loop formation, ensuring proper replication progression. Our analyses show that overexpression of Clr4/Suv39h, which is also required for efficient replication through these loci, suppresses phenotypes associated with the loss of Fft3. This work uncovers a conserved factor critical for epigenetic inheritance of heterochromatin and describes a mechanism in which suppression of nucleosome turnover prevents formation of structural barriers that impede replication at fragile regions in the genome.

| S-EPMC5407362 | biostudies-literature

Schizosaccharomyces pombe

Project description:Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome [BrdU IP]

| PRJNA349048 | ENA

Schizosaccharomyces pombe

Project description:Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome [H3K9me2 ChIP]

| PRJNA349049 | ENA

Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome

Project description:This SuperSeries is composed of the SubSeries listed below.

2017-03-21 | GSE88904 | GEO

Schizosaccharomyces pombe

Project description:Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome [HU + BrdU IP]

| PRJNA360443 | ENA

Schizosaccharomyces pombe

Project description:Snf2 Family Protein Fft3 Suppresses Nucleosome Turnover to Promote Epigenetic Inheritance of Heterochromatin and Proper Replication of the Genome [H3-FLAG ChIP]

| PRJNA349050 | ENA

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