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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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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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Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Epigenetic Regulation01:37

Epigenetic Regulation

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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RNA Stability01:53

RNA Stability

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Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
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The Nucleosome Core Particle01:12

The Nucleosome Core Particle

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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 10, 2025

Isolation and Cultivation of Neural Progenitors Followed by Chromatin-Immunoprecipitation of Histone 3 Lysine 79 Dimethylation Mark
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Histone lysine methylation modifiers controlled by protein stability.

Sungryul Park1, Jin Hwa Cho1, Jeong-Hoon Kim2,3

  • 1Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea.

Experimental & Molecular Medicine
|October 11, 2024
PubMed
Summary

Protein degradation controls histone lysine methylation, impacting cell functions and human diseases. Targeting modifier protein stability offers novel therapeutic strategies for epigenetic regulation.

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Complete Workflow for Analysis of Histone Post-translational Modifications Using Bottom-up Mass Spectrometry: From Histone Extraction to Data Analysis
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Area of Science:

  • Epigenetics and molecular biology
  • Cellular regulation and disease mechanisms

Background:

  • Histone lysine methylation is crucial for epigenetic regulation, influencing DNA-templated processes.
  • The activity of histone methylation modifiers (methyltransferases and demethylases) depends on their protein stability, regulated by degradation.
  • Dynamic epigenetic changes are orchestrated by the coordinated action of these modifiers.

Purpose of the Study:

  • To review the current understanding of how histone modifier protein degradation impacts cell physiology via epigenetic changes.
  • To summarize the links between aberrant modifier protein stability and human diseases.
  • To highlight therapeutic potential in targeting protein stability for novel treatment strategies.

Main Methods:

  • Literature review of existing research on protein degradation pathways affecting histone modifiers.
  • Analysis of functional connections between modifier protein stability and epigenetic alterations.
  • Examination of disease associations and therapeutic targeting of protein stability.

Main Results:

  • Protein degradation pathways critically regulate the stability and activity of histone lysine methylation modifiers.
  • Altered stability of these modifiers leads to significant epigenetic changes, affecting fundamental cellular processes.
  • Dysregulation of modifier protein stability is implicated in various human diseases.

Conclusions:

  • Understanding modifier protein degradation is key to comprehending epigenetic regulation and cell physiology.
  • Targeting protein stability presents a promising avenue for developing new therapeutic strategies for epigenetic-related diseases.