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The study of ESRRB occupancy in asynchronous and mitotic mESCs.

ABSTRACT: The study of ESRRB occupancy in asynchronous and mitotic mESCs.

PROVIDER: PRJNA1020083 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26145813_1.fastq.gz	Fastqsanger.gz
	SRR26145813_2.fastq.gz	Fastqsanger.gz
	SRR26145814_1.fastq.gz	Fastqsanger.gz
	SRR26145814_2.fastq.gz	Fastqsanger.gz
	SRR26145815_1.fastq.gz	Fastqsanger.gz

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The study of ESRRB occupancy in asynchronous and mitotic mESCs.

Project description:We performed ChIP-seq for ESRRB and investigated its deposition in asynchronous and mitotic cells.

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The study of SWI/SNF subunits and other transcription factors deposition in asynchronous and mitotic mESCs and cells released from mitosis

Project description:We executed CUT&RUN-seq for SWI/SNF components ARID1A, BRD9, SMARCA4, SMARCB1, SMARCE1, as well as ESRRB, SOX2, and EZH2 in asynchronous and mitotic cells and reported that, in asynchronous cells, ARID1A localized primarily at enhancer regions and EZH2 preferentially deposited at bivalent promoters and silent enhancer domains. The remaining factors were enriched at both TSS/promoters and to varying degrees at active enhancers. Unexpectedly, in mitosis, the chromatin regulatory factors almost all tethered at proximal gene regions with very little binding at enhancers. While the SWI/SNF subunits were bound principally at promoters, EZH2, the catalytic subunit of Polycomb Repressive Complex 2 was bound at both promoters and silent enhancers in mitotic cells. Moreover, we reported that upon the degradation of SMARCE1 in mitosis, the occupancy of SOX2, ESRRB, and EZH2 on mitotic chromatin was disrupted.

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Project description:We performed ChIP-seq for H3K4me3, H3K27ac, H3K4me1, H3K27me3, H3K36me3, H3K9me3, and H4K20me3 to characterize chromatin states and investigated SOX2 deposition in asynchronous and mitotic cells.

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SERBP1 iCLIP in mitotic and asynchronous cells with Blu577 treatment

Project description:In the associated paper, SERBP1 is shown to form granules in mitotic cells in a PKCɛ-dependent manner (M-bodies). We performed SERBP1 iCLIP in DLD1 cells that were either asynchronous or enriched for mitotic cells and after treatment with 2 hours of 500nM Blu577 or equivalent DMSO. We found that SERBP1 alters its positioning on rRNA in mitosis in a Blu577-dependent manner, identifying an alternative binding position that coincides with the formation of M-bodies. Mitotic enrichment was performed by single thymidine block, release in to G2 block with RO3306, and release and mitotic shake-off. The fastq files provided are demultiplexed, with adapters and barcodes trimmed and UMI sequences are found in the fastq headers.

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Gene expression analysis of R1 mESCs stably expressing WT ESRRB and Ser 25A (the O-GlcNAc residue mutant) ESRRB

Project description:Unnatural monosaccharides such as azidosugars that can be metabolically incorporated into cellular glycans are currently used as a major tool for glycan imaging and glycoproteomic profiling. As a common practice to enhance membrane permeability and cellular uptake, the unnatural sugars are per O-acetylated, which, however, can induce a long-overlooked side reaction, non enzymatic S-glycosylation. Herein, we develop 1,3-di-esterified N azidoacetylgalactosamine (GalNAz) as the next generation chemical reporters for metabolic glycan labeling. Both 1,3-di-O-acetylated GalNAz (1,3-Ac2GalNAz) and 1,3-di-O propionylated GalNAz (1,3-Pr2GalNAz) exhibited high efficiency for labeling protein O-GlcNAcylation with no artificial S-glycosylation. Applying 1,3-Pr2GalNAz in mouse embryonic stem cells (mESCs), we identified ESRRB, a critical transcription factor for pluripotency, as an O-GlcNAcylated protein. We showed that ESRRB O-GlcNAcylation is important for mESC self-renewal and pluripotency. Mechanistically, ESRRB is O-GlcNAcylated by O-GlcNAc transferase (OGT) at serine 25 (Ser 25), which stabilizes ESRRB, promotes its transcription activity and facilitates its interactions with two master pluripotency regulators, OCT4 and NANOG.

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