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DNase-chip: a high-resolution method to identify DNase I hypersensitive sites using tiled microarrays.
Gregory E Crawford1, Sean Davis, Peter C Scacheri
1National Human Genome Research Institute, National Institutes of Health, Building 31, Room 4B09, Bethesda, Maryland 20892, USA.
Nature Methods
|June 23, 2006
Summary
DNase-chip rapidly identifies gene regulatory elements by mapping DNase I hypersensitive sites. This scalable method reveals cell-type specific regulatory elements across the genome.
Area of Science:
- Genomics and Molecular Biology
- Epigenetics and Gene Regulation
Background:
- DNase I hypersensitive sites mark gene regulatory elements like promoters and enhancers.
- Traditional Southern blot methods for mapping these sites are not genome-scale compatible.
Purpose of the Study:
- To develop a rapid and scalable method for identifying DNase I hypersensitive sites.
- To enable genome-wide or targeted mapping of gene regulatory elements.
Main Methods:
- Development of DNase-chip, an approach utilizing tiled microarrays.
- Application of DNase-chip to map DNase I hypersensitive sites across 1% of the human genome.
Main Results:
- Accurate identification of DNase I hypersensitive sites in both primary and immortalized human cell types.
- Discovery of both common and cell-type specific DNase I hypersensitive sites.
- Demonstration of the method's applicability to any sequenced genome.
Conclusions:
- DNase-chip offers a scalable and rapid alternative to traditional methods for mapping gene regulatory elements.
- The method facilitates global or targeted analysis of regulatory landscapes in diverse biological contexts.