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Related Concept Videos

Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

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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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Duplication of Chromatin Structure02:05

Duplication of Chromatin Structure

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The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
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Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

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Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
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Euchromatin01:01

Euchromatin

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The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
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Nucleosome Remodeling02:54

Nucleosome Remodeling

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Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
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Histone Modification02:32

Histone Modification

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The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
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Updated: Jul 9, 2025

3D Multicolor DNA FISH Tool to Study Nuclear Architecture in Human Primary Cells
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Interplay between epigenome and 3D chromatin structure.

Man-Hyuk Han1, Dariya Issagulova1, Minhee Park2

  • 1Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea.

BMB Reports
|December 5, 2023
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Summary
This summary is machine-generated.

Epigenetic modifications and 3D chromatin structure are crucial for cell identity and function. This review explores their interplay and molecular mechanisms, integrating experimental and modeling data for a comprehensive view.

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Area of Science:

  • Molecular Biology
  • Genomics
  • Cell Biology

Background:

  • Epigenetic mechanisms, including histone and DNA modifications, dictate cellular identity and environmental responses.
  • The three-dimensional (3D) organization of chromatin within the nucleus significantly impacts genomic function.
  • Emerging evidence highlights the intricate relationship between epigenetic regulation and 3D chromatin architecture.

Approach:

  • This review synthesizes current experimental findings and computational modeling approaches.
  • It dissects the biological significance of the interplay between the epigenome and 3D chromatin structure.
  • The review also explores the underlying molecular mechanisms governing this interaction.

Key Points:

  • Epigenetic marks correlate with global and local 3D chromatin structure.
  • Causal links exist between epigenetic states and chromatin organization.
  • Understanding this interplay is vital for comprehending cellular functions.

Conclusions:

  • The epigenome and 3D chromatin structure are deeply interconnected, jointly regulating gene expression and cellular processes.
  • Further research integrating diverse methodologies will illuminate the complex molecular basis of this relationship.
  • This integrated understanding is essential for advancing cell biology and disease research.