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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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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.
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Nucleosome Remodeling02:54

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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.
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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.
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Chromatin Packaging01:32

Chromatin Packaging

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Each human somatic cell contains 6 billion base pairs of DNA. Each base pair is 0.34 nm long, meaning each diploid cell contains a staggering 2 meters of DNA. This long DNA strand is packed inside a nucleus measuring only 10-20 microns in diameter with the help of specialized DNA-binding proteins called histones. Together they form a compact DNA-protein complex called chromatin. The chromatin is further compacted into higher-order structures. The highest level of compaction is achieved during...
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Chromatin Position Affects Gene Expression02:35

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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. 
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Updated: Oct 13, 2025

Chromatin Immunoprecipitation from Human Embryonic Stem Cells
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Unpacking chromatin remodelling in germ cells: implications for development and evolution.

Covadonga Vara1, Aurora Ruiz-Herrera1

  • 1Departament de Biologia Cel.lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, 08193, Spain; Genome Integrity and Instability Group, Institut de Biotecnologia i Biomedicina (IBB), Universitat Autònoma de Barcelona (UAB), Cerdanyola del Vallès, 08193, Spain.

Trends in Genetics : TIG
|November 13, 2021
PubMed
Summary

Germ cell genome organization is key to species evolution and fertility. This study explores chromatin remodeling during germ cell formation and its impact from genome reshuffling.

Keywords:
HiCTADschromosomal fusionscompartmentsoocytesspermatocytes

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Area of Science:

  • Reproductive biology
  • Genetics
  • Evolutionary biology

Background:

  • Germ cells are crucial for species' evolutionary trajectory and future potential.
  • Understanding germ cell genome organization is fundamental to fertility and its evolutionary impact.
  • Chromatin dynamics play a vital role in germ cell development.

Purpose of the Study:

  • To explore the principles of chromatin remodeling during germ cell formation.
  • To investigate how genome reshuffling affects germ cell chromatin organization.
  • To enhance understanding of fertility, genetic diversity, and species evolution.

Main Methods:

  • Exploration of chromatin remodeling principles in germ cell development.
  • Analysis of genome organization within gametocytes.
  • Investigating the effects of genome reshuffling on germ cell chromatin.

Main Results:

  • Germ cell genome organization principles elucidated.
  • Chromatin remodeling dynamics during gametogenesis detailed.
  • Impact of genome reshuffling on germ cell chromatin identified.

Conclusions:

  • Germ cell genome organization is fundamental to fertility and evolution.
  • Chromatin remodeling is a key process in germ cell formation.
  • Understanding these processes aids in comprehending genetic diversity and evolutionary mechanisms.