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Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
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On the existence and functionality of topologically associating domains
Jonathan A Beagan1, Jennifer E Phillips-Cremins2,3,4
1Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
Nature Genetics
|January 12, 2020
Summary
Genomes fold into chromatin domains, like topologically associating domains (TADs). Recent high-resolution studies reveal complex hierarchical structures, prompting updated definitions based on new structural and functional insights.
Area of Science:
- Genomics
- Molecular Biology
- Cell Biology
Background:
- Eukaryotic genomes organize into higher-order chromatin domains.
- Topologically associating domains (TADs) were initially identified using low-resolution Hi-C data.
- Existing definitions of chromatin domains require updating based on new evidence.
Purpose of the Study:
- To review recent advances in understanding genome organization.
- To discuss the hierarchical structure-function relationship of chromatin domains.
- To propose updated definitions for chromatin domain classes.
Main Methods:
- High-resolution Hi-C (High-throughput Chromosome Conformation Capture) techniques.
- Single-cell imaging experiments.
- Functional genetic studies.
Main Results:
- High-resolution and single-cell data reveal a more complex genome architecture than previously understood.
- Functional genetic studies provide insights into the roles of different chromatin domains.
- Emerging knowledge necessitates a re-evaluation of chromatin domain classifications.
Conclusions:
- The hierarchical structure of chromatin domains is intricate and multifaceted.
- Updated definitions are crucial for accurately describing chromatin domains' structural, mechanistic, and functional properties.
- This work synthesizes recent findings to refine our understanding of genome organization.
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