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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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Chromatin Modification in iPS Cells01:32

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Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
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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
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Methods of Nuclear Reprogramming01:24

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Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for...
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Duplication of Chromatin Structure02:05

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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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Related Experiment Video

Updated: Oct 26, 2025

3D Multicolor DNA FISH Tool to Study Nuclear Architecture in Human Primary Cells
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3D or Not 3D: Shaping the Genome during Development.

Juliane Glaser1, Stefan Mundlos1,2,3

  • 1RG Development and Disease, Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany.

Cold Spring Harbor Perspectives in Biology
|July 27, 2021
PubMed
Summary
This summary is machine-generated.

Chromatin folding guides gene regulation for organism development. This review explores 3D genome organization, its role in development and organogenesis, and factors like structural variations and transposable elements that reshape it.

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Area of Science:

  • Developmental Biology
  • Genomics
  • Epigenetics

Background:

  • Understanding how a single fertilized cell develops into a complex organism is a fundamental question in developmental biology.
  • Gene regulation, particularly precise spatiotemporal gene expression, is crucial for this developmental process.
  • This regulation is achieved through a combination of DNA sequence, epigenetic modifications, trans-acting factors, and chromatin folding.

Purpose of the Study:

  • To review the critical role of chromatin folding in development.
  • To explore the mechanisms governing 3D genome organization and its establishment in embryos.
  • To discuss the contribution of the 3D genome to gene regulation during organogenesis and factors that can alter genome organization.

Main Methods:

  • Literature review of developmental biology, genomics, and epigenetics research.
  • Analysis of mechanisms controlling 3D genome organization.
  • Discussion of recent advances and ongoing debates in the field.

Main Results:

  • Chromatin folding is essential for precise gene regulation during development.
  • 3D genome organization is established early in the embryo and plays a key role in organogenesis.
  • Structural variations and transposable elements can significantly alter 3D genome organization.

Conclusions:

  • The 3D genome is a dynamic entity crucial for developmental processes.
  • Further research is needed to fully understand the interplay between genome organization and gene regulation.
  • Investigating alterations in 3D genome structure can provide insights into developmental disorders.