HDAC4 Gene

HDAC4 — Histone Deacetylase 4

Introduction

Hdac4 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@mcquown2011]
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Histone Deacetylase 4</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>HDAC4</td></tr>
<tr><td><strong>Full Name</strong></td><td>Histone Deacetylase 4</td></tr>
<tr><td><strong>Chromosome</strong></td><td>2q37.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[9759](https://www.ncbi.nlm.nih.gov/gene/9759)</td></tr>
<tr><td><strong>OMIM</strong></td><td>605314</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000113048</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P56524](https://www.uniprot.org/uniprot/P56524)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Alzheimer's Disease, Huntington's Disease, Parkinson's Disease, Brachydactyly, Cancer</td></tr>
</table>
</div>

Overview

...

HDAC4 — Histone Deacetylase 4

Introduction

Hdac4 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@mcquown2011]
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Histone Deacetylase 4</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>HDAC4</td></tr>
<tr><td><strong>Full Name</strong></td><td>Histone Deacetylase 4</td></tr>
<tr><td><strong>Chromosome</strong></td><td>2q37.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[9759](https://www.ncbi.nlm.nih.gov/gene/9759)</td></tr>
<tr><td><strong>OMIM</strong></td><td>605314</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000113048</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P56524](https://www.uniprot.org/uniprot/P56524)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Alzheimer's Disease, Huntington's Disease, Parkinson's Disease, Brachydactyly, Cancer</td></tr>
</table>
</div>

Overview

HDAC4 ([Histone Deacetylase](/entities/hdac-enzymes) 4) is a Class IIa histone deacetylase that regulates gene expression through epigenetic modification and transcription factor interaction. It shuttles between the nucleus and cytoplasm, allowing it to regulate both transcriptional programs and cytoplasmic signaling pathways["@wang2019"]. HDAC4 is particularly important in the brain, where it regulates memory-related genes, neuronal development, and synaptic plasticity. Dysregulation of HDAC4 has been implicated in several neurodegenerative diseases, making it an attractive therapeutic target["@mcquown2011"].

Gene Structure

• Chromosomal location: 2q37.3
• Gene family: Histone deacetylase, Class IIa
• Alternative splicing: Multiple isoforms

Protein Structure

Domain Organization

• N-terminal domain: Transcription factor binding
• Catalytic domain: HDAC activity
• C-terminal domain: Nuclear localization signals

Key Features

• Nuclear-cytoplasmic shuttling: Signal-dependent
• Multiple phosphorylation sites: Regulation by kinases
• Protein interactions: Broad binding profile

Molecular Function

Epigenetic Regulation

HDAC4 catalyzes histone deacetylation:

Histone modification: Removes acetyl groups from lysine tails

Chromatin remodeling: Promotes compact chromatin state

Transcriptional repression: Downregulates target genes

Transcriptional Regulation

Key Transcription Factor Interactions

• MEF2: Muscle-specific transcription factor
• REST: Neuronal gene repressor
• Runx: Transcription factor family
• [NF-κB](/entities/nf-kb): Inflammatory response

Signal-Dependent Regulation

• Calcium signaling: CaMK-dependent phosphorylation
• Stress responses: Cellular stress pathways
• Hormonal signals: Nuclear hormone receptor crosstalk

Expression Pattern

Tissue Distribution

| Tissue | Expression Level |
|--------|-----------------|
| Brain | Very High |
| Heart | High |
| Skeletal Muscle | High |
| Lung | Moderate |
| Liver | Low |

Brain Regions

• [Hippocampus](/brain-regions/hippocampus): Highest expression (CA1-CA3)
• Cerebral [cortex](/brain-regions/cortex): All layers
• Cerebellum: Purkinje cells
• Basal ganglia: Moderate expression

Role in Disease

Alzheimer's Disease

• Transcriptional dysregulation: Alters memory-related genes
• Nuclear localization: Changed in AD [neurons](/entities/neurons)
• HDAC inhibitors: Therapeutic benefit observed
• Amyloid effects: [Aβ](/proteins/amyloid-beta) affects HDAC4 function[^3]

Huntington's Disease

• Transcriptional dysfunction: Core pathological feature
• Mutant [huntingtin](/proteins/huntingtin-protein): Alters HDAC4 localization
• Therapeutic target: HDAC4 inhibitors under study
• Therapeutic benefit: In mouse models

Parkinson's Disease

• Dopaminergic neurons: HDAC4 affects survival
• [α-Synuclein](/proteins/alpha-synuclein) pathology: Interactions studied
• Therapeutic potential: Modulators in development

Other Conditions

• Brachydactyly: HDAC4 mutations cause skeletal defects
• Cancer: Dysregulated in various malignancies
• Cardiovascular disease: Cardiac gene regulation

Therapeutic Approaches

HDAC Inhibitors

| Drug | Selectivity | Clinical Status |
|------|-------------|-----------------|
| Vorinostat | Pan-HDAC | Approved (CTCL) |
| Trichostatin A | Class I/IIa | Research |
| HDAC4-selective | HDAC4 | Preclinical |

Challenges

• Brain penetration
• Subtype selectivity
• Side effect management

Research Directions

Selective inhibitors: Develop HDAC4-specific compounds

Mechanism studies: Understand disease-specific roles

Biomarkers: HDAC4 as disease marker

Gene therapy: AAV-mediated modulation

Animal Models

• HDAC4 knockout: Developmental abnormalities
• Conditional knockouts: Tissue-specific deletion
• Transgenic models: Disease-associated changes

See Also

• [HDAC4 Protein](/proteins/hdac4-protein)
• [HDAC Inhibitors](/therapeutics/hdac-inhibitors)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Huntington's Disease](/diseases/huntington-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Epigenetics in Neurodegeneration](/epigenetics-in-neurodegeneration)

External Links

• [NCBI Gene: HDAC4](https://www.ncbi.nlm.nih.gov/gene/9759)
• [UniProt: P56524](https://www.uniprot.org/uniprot/P56524)
• [Ensembl: ENSG00000113048](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000113048)
• [Allen Brain Atlas: HDAC4](https://human.brain-map.org/microarray/search/show?search_term=HDAC4)

Background

The study of Hdac4 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.

Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.

References

Wang J, et al, HDAC4 in neurodegeneration (2019)

McQuown SC, et al, HDAC4 is a key regulator of memory (2011)

Pathway Diagram

The following diagram shows the key molecular relationships involving HDAC4 Gene discovered through SciDEX knowledge graph analysis: