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Related Concept Videos

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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The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
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Inheritance of Chromatin Structures03:17

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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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Histone Variants at the Centromere02:30

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Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
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The Nucleosome Core Particle01:12

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Nucleosomes are the DNA-histone complex, where the DNA strand is wound around the histone core. The histone core is an octamer containing two copies of H2A, H2B, H3, and H4 histone proteins.
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their primary aim is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. On the other hand, they must allow polymerase enzymes to access histone-bound DNA during...
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Updated: Jun 16, 2025

Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark
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Histone modifications in development.

Yu-Hao Liu1, Robert Schneider1,2

  • 1Institute of Functional Epigenetics, Helmholtz Zentrum Munich, 85764 Neuherberg, Germany.

Development (Cambridge, England)
|June 13, 2025
PubMed
Summary
This summary is machine-generated.

Histone modifications regulate gene expression and the epigenetic landscape in eukaryotic cells. This summary focuses on lysine methylation and acylations, crucial for animal development.

Keywords:
AcetylationHistone modificationMethylationMutation

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Area of Science:

  • Molecular Biology
  • Epigenetics
  • Developmental Biology

Background:

  • Eukaryotic genetic material is organized into chromatin, composed of DNA, histones, and associated proteins.
  • Histone post-translational modifications are key regulators of chromatin structure and function.
  • These modifications influence gene expression patterns and the overall epigenetic landscape.

Purpose of the Study:

  • To summarize the role of key histone modifications in animal development.
  • To focus on the most studied histone modifications: lysine methylation and acylations (specifically acetylation).

Main Methods:

  • Literature review and synthesis of existing research on histone modifications.
  • Focus on established findings regarding lysine methylation and acetylation in animal development.

Main Results:

  • Histone modifications, particularly methylation and acetylation, play critical roles in regulating gene expression during animal development.
  • These modifications are essential for establishing and maintaining the epigenetic landscape, thereby controlling developmental processes.

Conclusions:

  • Histone methylation and acetylation are fundamental epigenetic mechanisms governing animal development.
  • Further research into these modifications can provide deeper insights into developmental biology and disease.