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FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner

ABSTRACT: FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner

PROVIDER: PRJNA648835 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12329200_1.fastq.gz	Fastqsanger.gz
	SRR12329200_2.fastq.gz	Fastqsanger.gz
	SRR12329201_1.fastq.gz	Fastqsanger.gz
	SRR12329201_2.fastq.gz	Fastqsanger.gz
	SRR12329229_1.fastq.gz	Fastqsanger.gz

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FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [ChIP-chip]

Project description:The histone chaperone FACT occupies transcribed regions where it plays prominent roles in maintaining chromatin integrity and preserving epigenetic information. How it is targeted to transcribed regions, however, remains unclear. Proposed models for how FACT finds its way to transcriptionally active chromatin include docking on the RNA polymerase II (RNAPII) C-terminal domain (CTD), recruitment by elongation factors, recognition of modified histone tails and binding partially disassembled nucleosomes. Here, we systematically tested these and other scenarios in Saccharomyces cerevisiae and found that FACT binds transcribed chromatin, not RNAPII. Through a combination of experimental and mathematical modeling evidence, we propose that FACT recognizes the +1 nucleosome, as it is partially unwrapped by the engaging RNAPII, and spreads to downstream nucleosomes aided by the chromatin remodeler Chd1. Our work clarifies how FACT interacts with genes, suggests a processive mechanism for FACT function, and provides a framework to further dissect the molecular mechanisms of transcription-coupled histone chaperoning.

2021-07-26 | GSE155110 | GEO

FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [ChIP-exo]

2021-07-26 | GSE155138 | GEO

FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [MNase-ChIP-Seq]

2021-07-26 | GSE155143 | GEO

FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [ChIP-chip]

Project description:FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [ChIP-chip]

| PRJNA648828 | ENA

FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [ChIP-exo]

Project description:FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [ChIP-exo]

| PRJNA648838 | ENA

FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [MNase-ChIP-Seq]

Project description:FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner [MNase-ChIP-Seq]

| PRJNA648839 | ENA

FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner.

Project description:The histone chaperone FACT occupies transcribed regions where it plays prominent roles in maintaining chromatin integrity and preserving epigenetic information. How it is targeted to transcribed regions, however, remains unclear. Proposed models include docking on the RNA polymerase II (RNAPII) C-terminal domain (CTD), recruitment by elongation factors, recognition of modified histone tails, and binding partially disassembled nucleosomes. Here, we systematically test these and other scenarios in Saccharomyces cerevisiae and find that FACT binds transcribed chromatin, not RNAPII. Through a combination of high-resolution genome-wide mapping, single-molecule tracking, and mathematical modeling, we propose that FACT recognizes the +1 nucleosome, as it is partially unwrapped by the engaging RNAPII, and spreads to downstream nucleosomes aided by the chromatin remodeler Chd1. Our work clarifies how FACT interacts with genes, suggests a processive mechanism for FACT function, and provides a framework to further dissect the molecular mechanisms of transcription-coupled histone chaperoning.

| S-EPMC9149603 | biostudies-literature

CHD1 in yeast is recruited by transcription elongation factors and maintains H3K4me3/H3K36me3 domains at actively transcribed and spliced genes

Project description:Chd1 is a conserved ATP-dependent chromatin remodeler that maintains the nucleosomal structure of chromatin, but the determinants of its specificity and its impact on gene expression are not well defined. To identify the determinants of Chd1 binding specificity in the yeast genome, we investigated Chd1 occupancy in mutants of several candidate factors. We found that several components of the PAF1 transcription elongation complex contribute to Chd1 recruitment to highly transcribed genes, and identified Spt4 as a factor that appears to negatively modulate Chd1 binding to chromatin. We discovered that CHD1 loss alters H3K4me3 and H3K36me3 patterns throughout the yeast genome. Interestingly, the aberrant histone H3 methylation patterns were predominantly observed within 1 kb from the transcription start site, where both histone H3 methylation marks co-occur. A reciprocal change between the two marks was obvious in the absence of Chd1, suggesting a role for CHD1 in establishing or maintaining the boundaries of these largely mutually exclusive histone marks. Strikingly, intron-containing genes were most susceptible to CHD1 loss, and exhibited a high degree of histone H3 methylation changes. Intron retention was significantly lower in the absence of CHD1, suggesting that CHD1 function as a chromatin remodeler could indirectly affect RNA splicing. This SuperSeries is composed of the SubSeries listed below.

2017-04-26 | GSE90998 | GEO

FACT is recruited to the +1 nucleosome of transcribed genes and spreads in a Chd1-dependent manner

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

2021-07-26 | GSE155144 | GEO

CHD1 in yeast is recruited by transcription elongation factors and maintains H3K4me3/H3K36me3 domains at actively transcribed and spliced genes [ChIP-seq]

Project description:We report genome-wide Chd1 occupancy in WT and in ten elongation factor mutants, and genome-wide H3K4me3/H3K36me3 profiles in WT and CHD1 mutant.

2017-04-26 | GSE90996 | GEO

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