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Histone Modification

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...

Histone Modification

Histone Modification

Behavior Modification

Behavior Modification

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...

Spreading of Chromatin Modifications

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...

Histone Variants at the Centromere

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...

Avoidance Learning and Learned Helplessness

Avoidance Learning and Learned Helplessness

Avoidance learning and learned helplessness are critical concepts in understanding behavioral responses to negative stimuli.
Avoidance learning occurs when an organism learns that a specific behavior can prevent an unpleasant outcome. For example, a student who receives a bad grade may start studying harder to avoid future poor grades. This behavior persists even when the negative outcome is no longer present. Avoidance learning is powerful because it maintains behavior in the absence of the...

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Related Experiment Video

Updated: Jan 20, 2026

Detection of Histone Modifications in Plant Leaves

Detection of Histone Modifications in Plant Leaves

Published on: September 23, 2011

The Role of Dynamic Histone Modifications in Learning Behavior.

Andre Fischer^1,2

¹Department for Psychiatry and Psychotherapy, University Medical Center Göttingen, Göttingen, Germany. andre.fischer@dzne.de.

Current Topics in Behavioral Neurosciences

|August 28, 2019

Summary

Epigenetic histone modifications are crucial for memory formation in the adult brain. Targeting these epigenetic changes offers potential therapeutic strategies for cognitive disorders.

Keywords:

Epigenetic therapies Histone methylation Learning Memory Neurodegenerative diseases Neuroepigenetics Neuropsychiatric diseases

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Related Experiment Videos

Last Updated: Jan 20, 2026

Detection of Histone Modifications in Plant Leaves

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Published on: September 23, 2011

Chromatin Immunoprecipitation ChIP to Assay Dynamic Histone Modification in Activated Gene Expression in Human Cells

Chromatin Immunoprecipitation ChIP to Assay Dynamic Histone Modification in Activated Gene Expression in Human Cells

Published on: July 29, 2010

Characterizing Histone Post-translational Modification Alterations in Yeast Neurodegenerative Proteinopathy Models

Characterizing Histone Post-translational Modification Alterations in Yeast Neurodegenerative Proteinopathy Models

Published on: March 24, 2019

Area of Science:

Neuroscience
Epigenetics
Molecular Biology

Background:

Epigenetic mechanisms, including histone modification, play a role in memory formation.
Therapeutic targeting of epigenetic machinery shows promise in preclinical models of cognitive dysfunction.

Purpose of the Study:

To discuss the role of histone modification in adult brain learning and memory.
To review dynamic changes in histone modification during memory processes.
To explore therapeutic opportunities for brain diseases targeting epigenetic machinery.

Main Methods:

Literature review and synthesis of current research on histone modification and memory.
Analysis of data on dynamic changes in histone modifications during memory processes.
Discussion of enzymatic machinery involved in histone modification in the adult brain.

Main Results:

Histone modifications are dynamically regulated during learning and memory processes.
Specific enzymes responsible for histone modification are present and active in the adult brain.
Preclinical evidence supports the therapeutic potential of targeting histone modifications.

Conclusions:

Histone modifications are integral to memory function in healthy and diseased brains.
Understanding the epigenetic machinery offers novel therapeutic avenues for neurological and psychiatric conditions affecting cognition.