Identifying Chromatin Regulatory Structures in the Human Genome
Author Information
Author(s): Xi Hualin, Shulha Hennady P, Lin Jane M, Vales Teresa R, Fu Yutao, Bodine David M, McKay Ronald D. G, Chenoweth Josh G, Tesar Paul J, Furey Terrence S, Ren Bing, Weng Zhiping, Crawford Gregory E
Primary Institution: Boston University
Hypothesis
The identification of regulatory elements from different cell types is necessary for understanding the mechanisms controlling cell type–specific and housekeeping gene expression.
Conclusion
The study found that 22% of DNaseI hypersensitive sites are shared among all cell types, with most of these corresponding to promoters or insulator elements.
Supporting Evidence
- 22% of DNaseI hypersensitive sites are shared among all cell types studied.
- 86% of ubiquitous DNaseI HS sites are located near transcription start sites.
- 10% of ubiquitous sites are bound by CTCF, a protein with enhancer-blocking activity.
- Cell type-specific DNaseI HS sites correlate with cell type-specific gene expression.
- Approximately 8% of the genome overlaps a DNaseI HS site in at least one of the six cell lines studied.
Takeaway
Scientists looked at how different parts of our DNA help control which genes are turned on in different types of cells. They found that some parts are used by all cells, while others are specific to certain cell types.
Methodology
The study used a high throughput method called DNase-chip to identify DNaseI hypersensitive sites from six different human cell types.
Limitations
The study was limited to analyzing only 1% of the human genome.
Statistical Information
P-Value
0.001
Statistical Significance
p<2.2 × 10−16
Digital Object Identifier (DOI)
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