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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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Updated: Feb 24, 2026

Deciphering High-Resolution 3D Chromatin Organization via Capture Hi-C
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Evolutionarily Conserved Principles Predict 3D Chromatin Organization.

M Jordan Rowley1, Michael H Nichols1, Xiaowen Lyu1

  • 1Department of Biology, Emory University, 1510 Clifton Road Northeast, Atlanta, GA 30322, USA.

Molecular Cell
|August 23, 2017
PubMed
Summary
This summary is machine-generated.

Compartmental domains organize chromatin structure across eukaryotes, with architectural proteins playing a key role in Drosophila. In mammals, CTCF loops contribute to forming topological domains alongside compartmental domains.

Keywords:
CTCFHi-CTADcompartmentepigeneticsinsulatorlooptranscription

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Area of Science:

  • Genomics
  • Molecular Biology
  • Epigenetics

Background:

  • 3D chromatin organization involves topologically associating domains (TADs), CTCF loop domains, and A/B compartments.
  • The precise relationship between these structural and functional components remains unclear.

Purpose of the Study:

  • To investigate the relationship between A/B compartments and other chromatin structures.
  • To define novel chromatin domains and their functional significance across eukaryotes.

Main Methods:

  • High-resolution Hi-C and HiChIP techniques were employed.
  • Analysis of chromatin organization in Drosophila, C. elegans, and A. thaliana.

Main Results:

  • Compartmental domains, corresponding to A/B compartments, were identified in Drosophila chromatin.
  • Transcriptional state significantly predicts Hi-C contact maps in multiple eukaryotes.
  • Architectural proteins insulate compartmental domains in Drosophila, while CTCF loops are not distinct.
  • In mammals, compartmental domains and CTCF loop domains cooperate to form topological domains.

Conclusions:

  • Compartmental domains are fundamental to eukaryotic chromatin domain structure.
  • CTCF plays a crucial role in mammalian domain formation, but not in Drosophila.