Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA317155 | ENA |
REPOSITORIES: ENA
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Project description:The pluripotency of embryonic stem cells (ESCs) is maintained by a small group of master transcription factors including Oct4, Sox2 and Nanog. These core factors form a regulatory circuit controlling the transcription of a number of pluripotency factors including themselves. Although a lot of previous studies have identified key factors regulating this core network in trans, the contribution of cis-regulatory DNA sequences on the transcription of these key pluripotency factors remains elusive. We analyzed epigenomic data within the 1.5 Mb gene-desert regions around Sox2 gene and predicted only one 13kb-long enhancer located 100kb downstream of Sox2 in mouse ES cells. This enhancer is occupied by Oct4, Sox2, Nanog, and mediator complex and forms a long-range DNA looping to Sox2 locus. We hypothesized that this enhancer is critical for Sox2 gene expression and tested this hypothesis by deleting this entire 13-kb enhancer with a simple highly-efficient double-excision CRISPR strategy. Allele-specific of Sox2 transcripts in heterozygous enhancer-deletion clones showed that the enhancer affects expression through a cis-acting mechanism. Strikingly, although this distal enhancer is not conserved in other mammals including human, it is responsible for over 90% of Sox2 expression in mouse ESCs. Taken together, our results provide direct evidence that in mouse ESCs, Sox2 transcription is primarily driven by a species-specific distal enhancer, which may provide new perspectives explaining the physiological difference between human and mouse ES cells. This dataset include ChIP-seq of H3K4me3 and H3K27ac in a hybrid mouse ES cells (F123). H3K27ac in J1 mouse ES cells. And RNA-seq in F123 mESCs with complete Sox2 enhancer deletion or enhancer haploinsufficient clones.
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Project description:Zinc finger and SCAN domain-containing 10 (Zscan10, also known as Zfp206) encodes a transcription factor that has been reported to be involved in the maintenance of pluripotency in mouse embryonic stem (ES) cells. Here we generated inducible knockout ES cells for Zscan10 using the Cre-loxP system and analyzed its function. We succeeded in establishing Zscan10-null ES cells and confirmed their pluripotency by the generation of chimeric embryos. Our results clearly indicate that Zscan10 is dispensable for the ability of self-renewal and differentiation in ES cells.
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