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P63 establishes epithelial enhancers de novo at critical craniofacial development genes

ABSTRACT: p63 establishes epithelial enhancers de novo at critical craniofacial development genes

PROVIDER: PRJNA521799 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8558490_1.fastq.gz	Fastqsanger.gz
	SRR8558490_2.fastq.gz	Fastqsanger.gz
	SRR8559140_1.fastq.gz	Fastqsanger.gz
	SRR8559140_2.fastq.gz	Fastqsanger.gz
	SRR8559150_1.fastq.gz	Fastqsanger.gz

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p63 establishes epithelial enhancers de novo at critical craniofacial development genes

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p63 establishes epithelial enhancers at critical craniofacial development genes.

Project description:The transcription factor p63 is a key mediator of epidermal development. Point mutations in p63 in patients lead to developmental defects, including orofacial clefting. To date, knowledge on how pivotal the role of p63 is in human craniofacial development is limited. Using an inducible transdifferentiation model, combined with epigenomic sequencing and multicohort meta-analysis of genome-wide association studies data, we show that p63 establishes enhancers at craniofacial development genes to modulate their transcription. Disease-specific substitution mutation in the DNA binding domain or sterile alpha motif protein interaction domain of p63, respectively, eliminates or reduces establishment of these enhancers. We show that enhancers established by p63 are highly enriched for single-nucleotide polymorphisms associated with nonsyndromic cleft lip ± cleft palate (CL/P). These orthogonal approaches indicate a strong molecular link between p63 enhancer function and CL/P, illuminating molecular mechanisms underlying this developmental defect and revealing vital regulatory elements and new candidate causative genes.

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Microarray analysis of palatal shelves from wild-type versus p63-null mouse embryos

Project description:Mutations in the transcription factor p63 underlie of a series of human malformation syndromes which are defined by a combination of epidermal, limb and craniofacial abnormalities including cleft lip and palate. Transcription profiling was performed to determine the role of p63 in vivo mouse palatal shelves. Microarray analysis was done of palatal shelves dissected from E14.0 wild-type versus p63-null mouse embryos.

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Genome wide identification of p63 binding sites in human neonatal foreskin keratinocytes

Project description:We report here genome wide identification of p63 binding sites in cycling neonatal foreskin keratinocytes using high throughput sequencing of ChIP enriched DNA. Analysis of gene ontology, database mining with integration with publicly available data, reveals a role for p63 in transcriptional regulation of multiple genes genetically linked to cleft palate. In addition, we identify AP-2Î±, a transcription factor which, when mutated, also results in craniofacial clefting syndrome, as a co-regulator of p63 responsive genes. Examination of p63 binding sites in neonatal foreskin keratinocytes

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Chromatin modification is not a prerequisite for p63 binding but p63 binding can elicit chromatin remodeling

Project description:Transcription factor (TF) p63 is a master regulator playing critical roles in epidermal development and other cellular processes. Our lab’s previous research deciphered a distinct chromatin architecture at p63 bound site in keratinocytes. In order to figure out whether those chromatin modifications already exist before p63 binding, or p63 occupancy contributes to such chromatin marks, we built p63-expressing cell lines. We then obtained p63 bound regions in these overexpressing cell line, and looked at different histone marks at those sites before p63 occupancy. As shown in the results, before p63 binding, the targeting sites have barely detectable histone marks, indicating p63’s capability to approach unmodified chromatins. Moreover, there is no significant difference in chromatin marks between p63 bound sites and unbound sites when no p63 binding happens. Our in vivo findings were confirmed by examining p63 binding to unmodified nucleosomes in vitro, showing that histone modification is not indispensable for p63 binding but binding site positioning on nucleosome does play a role. Overall, our results suggest that histone modifications do not affect p63 binding, and p63 protein can bind to inaccessible, weakly modified chromatin regions in vivo.

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Expression data from p63 siRNA in squamous cell lines

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Transcription factor p63 bookmarks genomic loci in epithelial cells and regulates a subset of target genes during epidermal differentiation through dynamic enhancers (RNA-Seq)

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Transcription factor p63 bookmarks genomic loci in epithelial cells and regulates a subset of target genes during epidermal differentiation through dynamic enhancers (ChIP-Seq)

2015-05-01 | E-GEOD-59824 | biostudies-arrayexpress