Widespread impact of nucleosome remodelers on transcription at cis-regulatory elements [TT-seq]
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ABSTRACT:
PROVIDER: PRJNA1078989 | ENA |
REPOSITORIES: ENA
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Project description:Nucleosome remodeling complexes and other regulatory factors work in concert to build a chromatin environment that directs the expression of a distinct set of genes in each cell using cis-regulatory elements (CREs) such as promoters and enhancers which drive transcription of both mRNAs and CRE-associated non-coding RNAs (ncRNAs). Two classes of CRE-associated ncRNAs include upstream antisense RNAs (uaRNAs), which are transcribed divergently from a shared mRNA promoter element, and enhancer RNAs (eRNAs), which are transcribed bidirectionally from active enhancers. The complicated network of CRE regulation by nucleosome remodelers remains only partially explored, with a focus on a select, limited number of remodelers. We endeavored to elucidate a remodeler-based regulatory network governing CRE-associated transcription (mRNA, eRNA, and uaRNA) in murine embryonic stem (ES) cells to test the hypothesis that many SNF2-family nucleosome remodelers collaborate to regulate the coding and non-coding transcriptome. Using depletion followed by transient transcriptome sequencing (TT-seq), we identified thousands of misregulated mRNAs and CRE-associated ncRNAs across the remodelers examined, identifying novel contributions by understudied remodelers in the regulation of coding and non-coding transcription. Our findings suggest that transcription of paired mRNAs and eRNAs are coordinately co-regulated, while mRNAs and uaRNAs sharing a promoter are independently regulated by remodelers. Our mechanistic studies suggest that while SRCAP and CHD8 modulate transcription through classical mechanisms such as transcription factors and histone variants, a broad set of remodelers including SMARCAL1 indirectly contribute to transcription regulation through maintenance of genomic stability and accurate Integrator complex activity. This study systematically examines the contribution of SNF2-remodelers to the CRE-associated transcriptome, identifying at least two classes for remodeler action.
2025-05-08 | GSE256312 | GEO
Project description:Widespread impact of nucleosome remodelers on transcription at cis-regulatory elements
| PRJNA1078987 | ENA
Project description:Nucleosome remodeling complexes and other regulatory factors work in concert to build a chromatin environment that directs the expression of a distinct set of genes in each cell using cis-regulatory elements (CREs) such as promoters and enhancers which drive transcription of both mRNAs and CRE-associated non-coding RNAs (ncRNAs). Two classes of CRE-associated ncRNAs include upstream antisense RNAs (uaRNAs), which are transcribed divergently from a shared mRNA promoter element, and enhancer RNAs (eRNAs), which are transcribed bidirectionally from active enhancers. The complicated network of CRE regulation by nucleosome remodelers remains only partially explored, with a focus on a select, limited number of remodelers. We endeavored to elucidate a remodeler-based regulatory network governing CRE-associated transcription (mRNA, eRNA, and uaRNA) in murine embryonic stem (ES) cells to test the hypothesis that many SNF2-family nucleosome remodelers collaborate to regulate the coding and non-coding transcriptome. Using depletion followed by transient transcriptome sequencing (TT-seq), we identified thousands of misregulated mRNAs and CRE-associated ncRNAs across the remodelers examined, identifying novel contributions by understudied remodelers in the regulation of coding and non-coding transcription. Our findings suggest that transcription of paired mRNAs and eRNAs are coordinately co-regulated, while mRNAs and uaRNAs sharing a promoter are independently regulated by remodelers. Our mechanistic studies suggest that while SRCAP and CHD8 modulate transcription through classical mechanisms such as transcription factors and histone variants, a broad set of remodelers including SMARCAL1 indirectly contribute to transcription regulation through maintenance of genomic stability and accurate Integrator complex activity. This study systematically examines the contribution of SNF2-remodelers to the CRE-associated transcriptome, identifying at least two classes for remodeler action.
2025-05-08 | GSE256311 | GEO
Project description:Nucleosome remodeling complexes and other regulatory factors work in concert to build a chromatin environment that directs the expression of a distinct set of genes in each cell using cis-regulatory elements (CREs) such as promoters and enhancers which drive transcription of both mRNAs and CRE-associated non-coding RNAs (ncRNAs). Two classes of CRE-associated ncRNAs include upstream antisense RNAs (uaRNAs), which are transcribed divergently from a shared mRNA promoter element, and enhancer RNAs (eRNAs), which are transcribed bidirectionally from active enhancers. The complicated network of CRE regulation by nucleosome remodelers remains only partially explored, with a focus on a select, limited number of remodelers. We endeavored to elucidate a remodeler-based regulatory network governing CRE-associated transcription (mRNA, eRNA, and uaRNA) in murine embryonic stem (ES) cells to test the hypothesis that many SNF2-family nucleosome remodelers collaborate to regulate the coding and non-coding transcriptome. Using depletion followed by transient transcriptome sequencing (TT-seq), we identified thousands of misregulated mRNAs and CRE-associated ncRNAs across the remodelers examined, identifying novel contributions by understudied remodelers in the regulation of coding and non-coding transcription. Our findings suggest that transcription of paired mRNAs and eRNAs are coordinately co-regulated, while mRNAs and uaRNAs sharing a promoter are independently regulated by remodelers. Our mechanistic studies suggest that while SRCAP and CHD8 modulate transcription through classical mechanisms such as transcription factors and histone variants, a broad set of remodelers including SMARCAL1 indirectly contribute to transcription regulation through maintenance of genomic stability and accurate Integrator complex activity. This study systematically examines the contribution of SNF2-remodelers to the CRE-associated transcriptome, identifying at least two classes for remodeler action.
2025-05-08 | GSE256313 | GEO
Project description:Nucleosome remodeling complexes and other regulatory factors work in concert to build a chromatin environment that directs the expression of a distinct set of genes in each cell using cis-regulatory elements (CREs) such as promoters and enhancers which drive transcription of both mRNAs and CRE-associated non-coding RNAs (ncRNAs). Two classes of CRE-associated ncRNAs include upstream antisense RNAs (uaRNAs), which are transcribed divergently from a shared mRNA promoter element, and enhancer RNAs (eRNAs), which are transcribed bidirectionally from active enhancers. The complicated network of CRE regulation by nucleosome remodelers remains only partially explored, with a focus on a select, limited number of remodelers. We endeavored to elucidate a remodeler-based regulatory network governing CRE-associated transcription (mRNA, eRNA, and uaRNA) in murine embryonic stem (ES) cells to test the hypothesis that many SNF2-family nucleosome remodelers collaborate to regulate the coding and non-coding transcriptome. Using depletion followed by transient transcriptome sequencing (TT-seq), we identified thousands of misregulated mRNAs and CRE-associated ncRNAs across the remodelers examined, identifying novel contributions by understudied remodelers in the regulation of coding and non-coding transcription. Our findings suggest that transcription of paired mRNAs and eRNAs are coordinately co-regulated, while mRNAs and uaRNAs sharing a promoter are independently regulated by remodelers. Our mechanistic studies suggest that while SRCAP and CHD8 modulate transcription through classical mechanisms such as transcription factors and histone variants, a broad set of remodelers including SMARCAL1 indirectly contribute to transcription regulation through maintenance of genomic stability and accurate Integrator complex activity. This study systematically examines the contribution of SNF2-remodelers to the CRE-associated transcriptome, identifying at least two classes for remodeler action.
2025-05-08 | GSE256310 | GEO
Project description:Widespread impact of nucleosome remodelers on transcription at cis-regulatory elements [ATAC-seq]
| PRJNA1078990 | ENA
Project description:Widespread impact of nucleosome remodelers on transcription at cis-regulatory elements [CUT&RUN]
| PRJNA1078988 | ENA
Project description:Widespread impact of nucleosome remodelers on transcription at cis-regulatory elements [RNA-seq]
| PRJNA1078991 | ENA
Project description:Arrays of regularly spaced nucleosomes dominate chromatin and are often phased, i.e., aligned at reference sites like active promoters. How distances between nucleosomes and distances between phasing sites and nucleosomes are determined remained unclear, specifically, the role of ATP dependent chromatin remodelers in it. Here, we used a genome-wide reconstitution system to probe how yeast remodelers generate phased nucleosome arrays. We find that remodelers bear a structural element named the ‘ruler’ that sets nucleosome spacing, in the order Chd1 < ISW1a < ISW2 < INO80. Structure-based mutagenesis confirmed the functional significance of the ruler element in INO80. Differences in the ruler elements of different remodelers explain the observed nucleosome array features. More generally, we propose that remodelers use their rulers to regulate the direction of nucleosome sliding in response to nucleosome density and environment, leading to nucleosome positioning relative to other nucleosomes, DNA bound factors or DNA sequence elements.
2020-02-10 | GSE140614 | GEO
Project description:ISWI-family chromatin remodelers organize nucleosome arrays, while SWI/SNF-family remodelers (RSC) disorganize and eject nucleosomes, implying an antagonism that is largely unexplored in vivo. Here, we describe two independent genetic screens for rsc suppressors that yielded mutations in the promoter-focused ISW1a complex, or mutations in the ‘basic patch’ of histone H4 (an epitope that regulates ISWI activity), strongly supporting RSC-ISW1a antagonism in vivo. RSC and ISW1a largely co-localize, and genomic nucleosome studies using rsc isw1 mutant combinations revealed opposing functions: promoters classified with a nucleosome-deficient region (NDR) gain nucleosome occupancy in rsc mutants, but this gain is attenuated in rsc isw1 double mutants. Furthermore, promoters lacking NDRs have the highest occupancy of both remodelers, consistent with regulation by nucleosome occupancy, and decreased transcription in rsc mutants. Taken together, we provide the first genetic and genomic evidence for RSC-ISW1a antagonism, and reveal different mechanisms at two different promoter architectures.
2015-04-01 | GSE65590 | GEO