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Related Concept Videos

The Nucleosome Core Particle01:12

The Nucleosome Core Particle

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...
The Nucleosome Core Particle02:10

The Nucleosome Core Particle

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.
The paradox
Nucleosomes, paradoxically, perform two opposite functions simultaneously. On the one hand, their main responsibility is to protect the delicate DNA strands from physical damage and help achieve a higher compaction ratio. While on the other hand, they must allow polymerase enzymes to access DNA...
Histone Modification02:32

Histone Modification

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 deacetylase,...
Histone Modification02:32

Histone Modification

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 deacetylase,...
Histone Variants at the Centromere02:30

Histone Variants at the Centromere

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 variants are also...
Spreading of Chromatin Modifications02:25

Spreading of Chromatin Modifications

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 is an enzyme that can...

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Updated: May 8, 2026

Extraction of Histones from Clinical Specimens for Epigenetic Profiling by Mass Spectrometry
10:54

Extraction of Histones from Clinical Specimens for Epigenetic Profiling by Mass Spectrometry

Published on: November 21, 2025

H1 histones: current perspectives and challenges.

Sean W Harshman1, Nicolas L Young, Mark R Parthun

  • 1Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, Ohio, USA, College of Medicine and Arthur G. James Comprehensive Cancer Center, Columbus, Ohio, USA, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA and Molecular and Cellular Biochemistry, The Ohio State University, Columbus, Ohio, USA.

Nucleic Acids Research
|August 16, 2013
PubMed
Summary
This summary is machine-generated.

Linker histones (H1) are crucial for chromatin structure and gene regulation. Recent research explores their complex biology, including isoforms, modifications, and interactions with DNA, despite experimental challenges.

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Unveiling Histone Proteoforms using 2D-TAU Gel Electrophoresis
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Unveiling Histone Proteoforms using 2D-TAU Gel Electrophoresis

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Purification of H3 and H4 Histone Proteins and the Quantification of Acetylated Histone Marks in Cells and Brain Tissue
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Purification of H3 and H4 Histone Proteins and the Quantification of Acetylated Histone Marks in Cells and Brain Tissue

Published on: November 30, 2018

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Last Updated: May 8, 2026

Extraction of Histones from Clinical Specimens for Epigenetic Profiling by Mass Spectrometry
10:54

Extraction of Histones from Clinical Specimens for Epigenetic Profiling by Mass Spectrometry

Published on: November 21, 2025

Unveiling Histone Proteoforms using 2D-TAU Gel Electrophoresis
07:20

Unveiling Histone Proteoforms using 2D-TAU Gel Electrophoresis

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Purification of H3 and H4 Histone Proteins and the Quantification of Acetylated Histone Marks in Cells and Brain Tissue
09:43

Purification of H3 and H4 Histone Proteins and the Quantification of Acetylated Histone Marks in Cells and Brain Tissue

Published on: November 30, 2018

Area of Science:

  • Molecular Biology
  • Epigenetics
  • Chromatin Biology

Background:

  • Linker histones (H1) are essential for higher-order chromatin structure.
  • They play a critical role in regulating gene expression.
  • Linker histone biology is complex due to evolutionary variability, multiple isoforms, and extensive posttranslational modifications.

Purpose of the Study:

  • To review recent advancements in understanding linker histone structure, genetics, and posttranslational modifications.
  • To emphasize the dynamic interactions of linker histones with DNA and transcriptional regulators.
  • To discuss experimental challenges in studying H1 proteins and their modifications.

Main Methods:

  • Literature review of recent progress in linker histone research.
  • Analysis of studies focusing on chromatin structure and gene regulation.
  • Discussion of methodologies for studying protein-DNA interactions and posttranslational modifications.

Main Results:

  • Linker histones exhibit complex biology with diverse isoforms and modifications.
  • Dynamic interactions with DNA and transcriptional regulators are key to their function.
  • Significant experimental challenges exist in studying these proteins and their modifications.

Conclusions:

  • Understanding linker histone structure, genetics, and modifications is crucial for comprehending chromatin dynamics and gene regulation.
  • Overcoming experimental hurdles is necessary for deeper insights into H1 protein function.
  • Further research is needed to fully elucidate the role of linker histones in cellular processes.