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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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Histone Modification02:32

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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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Spreading of Chromatin Modifications02:25

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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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Heterochromatin02:38

Heterochromatin

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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 that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
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Related Experiment Video

Updated: Apr 21, 2026

Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark
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Another twist in the histone memory code.

Sheena Josselyn1, Paul W Frankland1

  • 11] Program in Neurosciences and Mental Health, The Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada [2] Institute of Medical Science, University of Toronto, Toronto, Ontario M5S 1A8, Canada [3] Department of Psychology, University of Toronto, Toronto, Ontario M5S 3GM, Canada [4] Department of Physiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada.

Cell Research
|October 25, 2014
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Summary
This summary is machine-generated.

Researchers discovered a new regulator of chromatin structure, specifically histone variants, plays a key role in memory formation. This finding sheds light on the epigenetic mechanisms underlying memory.

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Area of Science:

  • Epigenetics
  • Neuroscience
  • Molecular Biology

Background:

  • Transcription is a fundamental biological process crucial for gene expression.
  • Memory formation involves complex molecular mechanisms, including transcription factors and epigenetic regulators.
  • Chromatin structure plays a significant role in regulating gene accessibility.

Purpose of the Study:

  • To investigate the role of novel chromatin structure regulators in memory formation.
  • To identify new molecular players involved in the epigenetic basis of memory.

Main Methods:

  • The study focused on the incorporation of histone variants as a mechanism of chromatin remodeling.
  • Analysis of gene expression and chromatin dynamics in the context of memory processes.

Main Results:

  • A novel regulator of chromatin structure, involving histone variants, was identified.
  • This regulator was shown to be important for memory formation.
  • The findings highlight a new layer of epigenetic control in cognitive processes.

Conclusions:

  • Histone variant incorporation is a critical mechanism in memory formation.
  • Epigenetic regulation of chromatin structure is a promising area for understanding memory.
  • This discovery opens new avenues for research into neurological disorders affecting memory.