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Related Concept Videos

Histone Modification02:32

Histone Modification

14.4K
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

Spreading of Chromatin Modifications

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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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Role of Neurotransmitters in Memory01:23

Role of Neurotransmitters in Memory

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Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
 Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is...
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Role of Hippocampus in Memory01:19

Role of Hippocampus in Memory

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The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
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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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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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Related Experiment Video

Updated: Oct 1, 2025

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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Histone Deacetylases 1 and 2 in Memory Function.

Ping-Chieh Pao1,2, Li-Huei Tsai1,2

  • 1Picower Institute for Learning and Memory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

ACS Chemical Neuroscience
|March 9, 2022
PubMed
Summary

Histone deacetylases (HDACs), specifically HDAC1 and HDAC2, are crucial for learning and memory. Modulating these enzymes offers a promising strategy to combat cognitive decline in aging and neurodegenerative diseases.

Keywords:
DNA repairHDAC1HDAC2Histone acetylationlearning and memory

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Epigenetics

Background:

  • Histone deacetylases (HDACs) play a role in cognitive functions.
  • Dysregulation of HDACs is linked to cognitive impairment in aging and neurodegenerative conditions.
  • HDAC1 and HDAC2 are key HDACs implicated in brain function.

Purpose of the Study:

  • To review the roles of HDAC1 and HDAC2 in regulating brain function.
  • To highlight recent advancements in understanding their mechanisms of action.
  • To explore the therapeutic potential of targeting HDAC1 and HDAC2 for memory deficits.

Main Methods:

  • Literature review of recent research on HDAC1 and HDAC2.
  • Analysis of studies on gene repression and DNA repair pathways regulated by HDACs.
  • Examination of evidence for HDAC modulation strategies.

Main Results:

  • HDAC1 and HDAC2 regulate brain function through distinct mechanisms, including gene repression.
  • These enzymes are involved in critical cellular processes such as DNA repair.
  • Evidence suggests HDAC1 and HDAC2 can be modulated for therapeutic benefit.

Conclusions:

  • HDAC1 and HDAC2 are critical regulators of learning and memory.
  • Targeting HDAC1 and HDAC2 presents a viable therapeutic avenue for cognitive impairment.
  • Further research into HDAC modulation could lead to treatments for memory deficits.