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Related Concept Videos

Histone Modification02:32

Histone Modification

16.0K
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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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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Histone Variants at the Centromere02:30

Histone Variants at the Centromere

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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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Behavior Modification01:21

Behavior Modification

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Behavioral approaches have often been criticized for ignoring mental processes and focusing solely on observable behavior. However, these approaches provide an optimistic perspective for individuals seeking to change their behaviors. Rather than concentrating on intrinsic personality traits, behavioral approaches suggest that even longstanding habits can be modified by changing the reward contingencies that maintain them.
A real-world application of operant conditioning principles is applied...
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Protein Modifications in the RER01:26

Protein Modifications in the RER

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Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
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Related Experiment Video

Updated: Jan 27, 2026

Detection of Histone Modifications in Plant Leaves
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Detection of Histone Modifications in Plant Leaves

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Histone Modifications as an Intersection Between Diet and Longevity.

Diego Molina-Serrano1,2, Dimitris Kyriakou3,4, Antonis Kirmizis4

  • 1UMR 6290, Centre National de la Recherche Scientifique, Rennes, France.

Frontiers in Genetics
|March 28, 2019
PubMed
Summary

Histone modifications, epigenetic regulators of gene expression, significantly influence aging. Diet impacts these modifications, suggesting they mediate how diet affects lifespan and healthy aging.

Keywords:
agingcaloric restrictiondiethigh-fat diethistone modificationlifespanlongevitylow-protein diet

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Area of Science:

  • Epigenetics
  • Molecular Biology
  • Gerontology

Background:

  • Histone modifications are crucial epigenetic regulators controlling chromatin structure and gene transcription.
  • Altered histone modifications are increasingly linked to the aging process and cellular phenotypes.
  • Environmental factors, notably diet, can influence histone modification levels and gene expression.

Purpose of the Study:

  • To review the role of histone modifications in aging.
  • To present evidence that diet affects histone modification levels.
  • To explore histone modifications as a potential mediator of diet's effects on lifespan.

Main Methods:

  • Literature review focusing on histone modifications and aging.
  • Analysis of studies linking environmental stimuli (diet) to histone modifications.
  • Exploration of the intersection between diet, histone modifications, and lifespan regulation.

Main Results:

  • Histone modifications play a significant role in the aging process.
  • Diet is demonstrated to alter the abundance and localization of histone modifications.
  • Histone modifications act as a cellular platform for integrating signals like diet.

Conclusions:

  • Histone modifications are central to understanding aging.
  • Diet influences lifespan, potentially through epigenetic pathways involving histone modifications.
  • Understanding these epigenetic links may offer new therapeutic strategies for age-related diseases and healthy aging.