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Promoter Capture Hi-C: High-resolution, Genome-wide Profiling of Promoter Interactions
Published on: June 28, 2018
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Mapping long-range promoter contacts in human cells with high-resolution capture Hi-C
Borbala Mifsud1, Filipe Tavares-Cadete2, Alice N Young3
11] The Francis Crick Institute, London, UK. [2] UCL Genetics Institute, University College London, London, UK.
Nature Genetics
|May 5, 2015
Summary
Capture Hi-C (CHi-C) maps genome-wide DNA interactions, revealing how gene promoters connect with regulatory elements in human blood cells. This helps understand gene regulation and how mutations affect gene activity.
Area of Science:
- Genomics
- Molecular Biology
- Epigenetics
Background:
- Transcriptional control in large genomes relies on DNA looping between distal elements like enhancers and promoters.
- Existing chromosome conformation capture methods lack the resolution for genome-wide regulatory interaction analysis.
Purpose of the Study:
- To investigate long-range DNA interactions involving gene promoters using an adapted genome conformation assay.
- To map regulatory interactions at high resolution across the genome in human blood cells.
Main Methods:
- Utilized Capture Hi-C (CHi-C), an advanced chromosome conformation capture technique.
- Analyzed interactions for nearly 22,000 promoters in two human blood cell types.
Main Results:
- Identified over 1.6 million shared and cell type-specific interactions between promoters and distal loci.
- Found that active genes interact with enhancer-like elements, while inactive genes contact repressive elements.
- Discovered enrichment of disease-associated SNPs in interacting loci, suggesting mechanisms for distal mutation effects.
Conclusions:
- CHi-C provides high-resolution insights into genome-wide regulatory interactions.
- Identified novel long-range silencers and their role in gene regulation.
- Provides a framework for understanding how distal genetic variations impact gene regulation and disease.
