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| Status |
Public on Jun 15, 2016 |
| Title |
The landscape of accessible chromatin in mammalian pre-implantation embryos (ChIP -Seq) |
| Organism |
Mus musculus |
| Experiment type |
Genome binding/occupancy profiling by high throughput sequencing
|
| Summary |
In mammals, extensive chromatin reorganization is essential for reprogramming terminally committed gametes to a totipotent state during preimplantation development. However, the global chromatin landscape and its dynamics in this period remain unexplored. Here we report a genome-wide map of accessible chromatin in mouse preimplantation embryos using an improved assay for transposase-accessible chromatin with high throughput sequencing (ATAC-seq) approach with CRISPR/Cas9-assisted mitochondrial DNA depletion. We show that despite extensive parental asymmetry in DNA methylomes, the chromatin accessibility between the parental genomes is globally comparable after major zygotic genome activation (ZGA). Accessible chromatin in early embryos is widely shaped by transposable elements and overlaps extensively with putative cis-regulatory sequences. Unexpectedly, accessible chromatin is also found near the transcription end sites of active genes. By integrating the maps of cis-regulatory elements and single-cell transcriptomes, we construct the regulatory network of early development, which helps to identify the key modulators for lineage specification. Finally, we find that the activities of cis-regulatory elements and their associated open chromatin diminished before major ZGA. Surprisingly, we observed many loci showing non-canonical, large open chromatin domains over the entire transcribed units in minor ZGA, supporting the presence of an unusually permissive chromatin state. Together, these data reveal a unique spatiotemporal chromatin configuration that accompanies early mammalian development.
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| Overall design |
Mouse 2-cell embryos were obtained from crosses of C57BL/6N x PWK for ChIP-seq samples.
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| Contributor(s) |
Wu J, Huang B, Chen H, Xie W |
| Citation(s) |
27309802 |
| |
| Submission date |
Apr 05, 2016 |
| Last update date |
May 15, 2019 |
| Contact name |
Wei Xie |
| E-mail(s) |
xiewei121@tsinghua.edu.cn
|
| Organization name |
Tsinghua University
|
| Street address |
zhongguancun beidajie
|
| City |
Beijing |
| ZIP/Postal code |
100086 |
| Country |
China |
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| Platforms (1) |
| GPL18480 |
Illumina HiSeq 1500 (Mus musculus) |
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| Samples (2) |
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| This SubSeries is part of SuperSeries: |
| GSE66390 |
The landscape of accessible chromatin in mammalian pre-implantation embryos |
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| Relations |
| BioProject |
PRJNA317459 |
| SRA |
SRP072872 |
