Genomewide Analysis of PRC1 and PRC2 Occupancy Identifies Two Classes of Bivalent Domains
Author Information
Author(s): Ku Manching, Koche Richard P., Rheinbay Esther, Mendenhall Eric M., Endoh Mitsuhiro, Mikkelsen Tarjei S., Presser Aviva, Nusbaum Chad, Xie Xiaohui, Chi Andrew S., Adli Mazhar, Kasif Simon, Ptaszek Leon M., Cowan Chad A., Lander Eric S., Koseki Haruhiko, Bernstein Bradley E.
Primary Institution: Massachusetts General Hospital
Hypothesis
What are the structural and functional characteristics of bivalent chromatin domains in embryonic stem cells?
Conclusion
The study identifies two classes of bivalent domains in embryonic stem cells, with distinct regulatory properties and functional implications.
Supporting Evidence
- Bivalent domains can be segregated into two classes: PRC1-positive and PRC2-only.
- PRC1-positive bivalent domains are functionally distinct and more likely to retain repressive marks upon differentiation.
- Computational analysis suggests that the locations of Polycomb complexes can be predicted from the characteristics of CpG islands.
Takeaway
Scientists studied how certain proteins control gene activity in stem cells and found two types of gene regions that help keep genes ready to be turned on or off.
Methodology
The study used chromatin immunoprecipitation followed by ultra high-throughput sequencing (ChIP-Seq) to map histone modifications and Polycomb complex occupancy in human and mouse embryonic stem cells.
Limitations
The study primarily focuses on embryonic stem cells and may not generalize to other cell types or conditions.
Statistical Information
P-Value
p<10−10
Statistical Significance
p<10−10
Digital Object Identifier (DOI)
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