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Effect of depletion of YY1 on gene expression in ESCC cells.

ABSTRACT: Effect of depletion of YY1 on gene expression in ESCC cells.

PROVIDER: PRJNA955691 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24174374_1.fastq.gz	Fastqsanger.gz
	SRR24174374_2.fastq.gz	Fastqsanger.gz
	SRR24174375_1.fastq.gz	Fastqsanger.gz
	SRR24174375_2.fastq.gz	Fastqsanger.gz
	SRR24174376_1.fastq.gz	Fastqsanger.gz

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Effect of depletion of YY1 on gene expression in ESCC cells.

Project description:To investigate the role of YY1 in ESCC, we established shYY1 ESCC cell lines in which target gene has been knocked down by shRNA. We then performed gene expression profiling analysis using data obtained from RNA-seq of shNC and shYY1 cells.

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YY1 safeguard multidimensional epigenetic landscape associated with extended pluripotency

Project description:Although extended pluripotent stem cells (EPSCs) have the potential to form both embryonic and extraembryonic lineages, how their transcriptional regulatory mechanism differs from that of embryonic stem cells (ESCs) remains unclear. Here, we discovered that YY1 binds to specific open chromatin regions in EPSCs. Yy1 depletion in EPSCs leads to a gene expression pattern more similar to that of ESCs than control EPSCs. Moreover, Yy1 depletion triggers a series of epigenetic crosstalk activities, including changes in DNA methylation, histone modifications and high-order chromatin structures. Yy1 depletion in EPSCs disrupts the enhancer-promoter (EP) interactions of EPSC-specific genes, including Dnmt3l. Yy1 loss results in DNA hypomethylation and dramatically reduces the enrichment of H3K4me3 and H3K27ac on the promoters of EPSC-specific genes by upregulating the expression of Kdm5c and Hdac6 through facilitating the formation of CCCTC-binding factor (CTCF)-mediated EP interactions surrounding their loci. Furthermore, single-cell RNA sequencing (scRNA-seq) experiments revealed that YY1 is required for the derivation of extraembryonic endoderm (XEN)-like cells from EPSCs in vitro. Together, this study reveals that YY1 functions as a key regulator of multidimensional epigenetic crosstalk associated with extended pluripotency.

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YY1 Interacts with G quadruplex DNA to Regulate Gene Expression

Project description:We systematically analyzed the alterations in mRNA transcriptome evoked by knockdown of YY1 with or without pyridostatin (PDS) treatment. Statistical analysis showed a strong correlation between PDS-regulated and YY1-regulated genes (Pearson r > 0.67), underscoring the role of YY1-G4 structure interaction in YY1-mediated gene regulation. Moreover, the RNA-Seq results revealed that YY1 can positively or negatively regulate the expression of genes through its interaction with G4 structures.

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Project description:YY1 is a ubiquitously expressed, intrinsically disordered transcription factor involved in neural development. The oligomeric state of YY1 varies depending on the environment. These changes may alter its DNA binding ability and hence its transcriptional activity. In addition to its oligomeric state, the interaction of YY1 with proteins such as FOXP2 can impact its role in transcription. The aim of this work is to study the structure and dynamics of YY1 binding to DNA and to determine the influence of oligomerisation and associations with FOXP2 on its DNA binding mechanism. Size exclusion chromatography, fluorescence anisotropy and electrophoretic mobility shift assays were used to study YY1 oligomerisation and interaction with FOXP2. To better understand potential structural changes to YY1 upon DNA binding, hydrogen deuterium exchange mass spectrometry was used. The results indicate that YY1 consists of specific structured regions, while most of the sequence remains disordered. Furthermore, the oligomeric nature of the protein is dependent on ionic strength. DNA affects oligomerisation and the protein undergoes changes in structure and dynamics upon DNA binding. YY1 and FOXP2 were found to interact with each other both in isolation and in the presence of YY1-specific DNA. The heterogeneous, dynamic multimerisation of YY1 identified in this work is, therefore, likely to be important for its ability to make heterologous associations with other proteins such as FOXP2. The interactions that YY1 forms with itself, FOXP2 and DNA form part of an intricate mechanism of transcriptional regulation by YY1, which is vital for appropriate neural development.

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