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ATAC-seq, H3K9ac ChIP-seq and 4sU-seq in WT, SAGA and ATAC mutant mouse embryonic stem cells

ABSTRACT: This SuperSeries is composed of the ATAC-seq, H3K9ac ChIP-seq and 4sU-seq SubSeries.

ORGANISM(S): Mus musculus

PROVIDER: GSE175905 | GEO | 2021/08/03

REPOSITORIES: GEO

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ATAC-seq, H3K9ac ChIP-seq and 4sU-seq in WT, SAGA and ATAC mutant mouse embryonic stem cells

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H3K9ac ChIP-seq in WT, SAGA and ATAC mutant mouse embryonic stem cells

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Newly synthesized RNA analysis in WT, SAGA and ATAC mutant mouse embryonic stem cells

Project description:To analyse the genome-wide impact of inactivation of the ATAC or SAGA coactivator complexes on RNA polymerase II (Pol II) transcription, we purified newly synthesized RNA from mutant mouse embryonic stem (ES) cell lines in which subunits of ATAC (Yeats2, Zzz3) or SAGA (Supt7l) are inactivated or depleted. We also performed this analysis in mutant cell lines in which a subunit (Tada3) of the shared histone acetyltransferase activity of these two complexes is depleted. Newly synthesized RNA was purified following the 4sU labelling method (more details in extract protocol). For two wildtype samples, the total RNA input was also analysed.

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Effect of 4sU labeling concentrations on quantification bias in nucleotide conversion RNA-seq data

Project description:To investigate the effect of increasing 4sU labeling concentrations on quantification bias in nucleotide conversion RNA-seq, we labeled 3 different cell lines with increasing concentrations of 4sU. We then measured 4sU dropout in 4sU samples compared to 4sU naive samples.

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Project description:SAGA and ATAC are two related transcriptional coactivator complexes, sharing the same histone acetyltransferase (HAT) subunit. The HAT activities of SAGA and ATAC are required for metazoan development but the precise role of the two complexes in RNA polymerase II transcription in mammals is less understood. To determine whether SAGA and ATAC have redundant or specific functions dependent on their HAT activities, we compared the effects of HAT inactivation in each complex with that of inactivation of either SAGA or ATAC core subunits in mouse embryonic stem cells (ESCs). We show that core subunits of SAGA or ATAC subunits are required for complex assembly, mouse ESC growth and self-renewal. Additionally, ATAC, but not SAGA subunits are required for ESC viability by regulating the transcription of translation-related genes. Surprisingly, depletion of specific or shared HAT module subunits caused a global decrease in histone H3K9 acetylation, but did not result in significant phenotypic or transcriptional defects. Thus, our results indicate that SAGA and ATAC are differentially required for viability and self-renewal of mouse ESCs by regulating transcription through different pathways, in a HAT-independent manner.

2021-08-11 | PXD027026 | Pride

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