HDAC1 Protein

HDAC1 Protein

Introduction

Hdac1 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

[Histone Deacetylase](/entities/hdac-enzymes) 1 (HDAC1) is a member of the class I histone deacetylases that plays a central role in epigenetic regulation of gene expression[@yang2008]. It catalyzes the removal of acetyl groups from lysine residues on histone tails, leading to chromatin condensation and transcriptional repression. HDAC1 is implicated in numerous neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis, making it an important therapeutic target[@grff2013].

HDAC1 Protein

Introduction

Hdac1 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

[Histone Deacetylase](/entities/hdac-enzymes) 1 (HDAC1) is a member of the class I histone deacetylases that plays a central role in epigenetic regulation of gene expression[@yang2008]. It catalyzes the removal of acetyl groups from lysine residues on histone tails, leading to chromatin condensation and transcriptional repression. HDAC1 is implicated in numerous neurodegenerative diseases including Alzheimer's disease, Parkinson's disease, Huntington's disease, and amyotrophic lateral sclerosis, making it an important therapeutic target[@grff2013].

<div class="infobox infobox-protein">
<table>
<tr><th colspan="2" style="background:#f0f0f0;">HDAC1 Protein</th></tr>
<tr><td><strong>Protein Name</strong></td><td>Histone Deacetylase 1</td></tr>
<tr><td><strong>Gene</strong></td><td>[HDAC1](/genes/hdac1)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[Q13547](https://www.uniprot.org/uniprot/Q13547)</td></tr>
<tr><td><strong>PDB ID(s)</strong></td><td>1C3R, 4BKX, 5IGW</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>55 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Nucleus</td></tr>
<tr><td><strong>Protein Family</strong></td><td>Class I HDACs</td></tr>
<tr><td><strong>Expression</strong></td><td>Ubiquitous, high in brain</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">Alzheimer's Disease</a>, <a href="/wiki/autoimmune" style="color:#ef9a9a">Autoimmune</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">178 edges</a></td>
</tr>
</table>
</div>

Structure

Catalytic Domain

• Zn²⁺-dependent hydrolase: Requires zinc ion for catalytic activity
• Residues 1-375: Form the deacetylase core
• Active site pocket: Contains the catalytic zinc-binding site
• Loop structures: Determine substrate specificity

Protein Complexes

HDAC1 functions as part of multi-protein complexes[@kadamb2013]:

• Sin3 complex: Corepressor complex with Sin3A/B and HDAC2
• CoREST complex: With REST transcription factor
• NuRD complex: With Mi-2/CHD4, MTA1, RbAp46/48
• Corest/Sin3: HDAC1/2 in neuronal gene repression

Function

Enzymatic Activity

• Histone deacetylation: Removes acetyl groups from H3/H4 tails
• Non-histone substrates: p53, [NF-κB](/entities/nf-kb), STAT3, HSF1
• Reaction mechanism: Zinc-dependent hydrolysis of acetyl-lysine

Transcriptional Regulation

• Chromatin compaction: Deacetylated histones bind DNA more tightly
• Gene silencing: Repression of target gene expression
• Developmental genes: Critical for development and differentiation

Cellular Processes

• Cell cycle: Regulation of p21, cyclin expression
• DNA repair: Modulates DNA damage response
• [Apoptosis](/entities/apoptosis): Controls pro/anti-apoptotic gene expression

Role in Disease

Alzheimer's Disease

HDAC1 alterations in AD include[@haberl2015]:

• Activity changes: Reduced HDAC1 activity in AD brain
• [Tau](/proteins/tau) pathology: HDAC1 can deacetylate [tau](/proteins/tau)
• Memory formation: HDAC1 important for memory consolidation
• Therapeutic potential: HDAC1 activators may be beneficial

Parkinson's Disease

• [α-Synuclein](/proteins/alpha-synuclein): HDAC1 affects α-syn aggregation
• Dopaminergic [neurons](/entities/neurons): Neuroprotective role
• Mitochondrial function: Regulates PGC-1α expression

Huntington's Disease

• Transcription dysregulation: HDAC1 contributes to transcriptional deficits
• mHTT effects: Mutant [huntingtin](/proteins/huntingtin-protein) affects HDAC1 localization
• Therapeutic targeting: HDAC inhibitors show promise in HD models

Amyotrophic Lateral Sclerosis

• [TDP-43](/proteins/tdp-43) pathology: HDAC1 activity affected
• Motor neuron survival: Protective role
• Gene expression: Dysregulation of survival genes

Therapeutic Approaches

HDAC Inhibitors

| Drug | Class | Clinical Status | Disease |
|------|-------|-----------------|---------|
| Vorinostat | Pan-HDAC | Approved (CTCL) | Cancer |
| Valproic acid | Pan-HDAC | Approved (seizures) | Epilepsy |
| Entinostat | Class I | Clinical trials | Various |
| RGFP966 | HDAC3-selective | Preclinical | Various |

Challenges

• Pan-inhibitor effects: Lack of selectivity
• Side effects: Cytopenia, fatigue, GI toxicity
• [Blood-brain barrier](/entities/blood-brain-barrier): Variable penetration

See Also

• [HDAC1 Gene](/proteins/hdac1-protein)
• [HDAC Enzymes](/entities/hdac-enzymes)
• [Epigenetics in Neurodegeneration](/mechanisms/epigenetics-ad)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Huntington's Disease](/diseases/huntingtons)

External Links

• [UniProt Q13547](https://www.uniprot.org/uniprot/Q13547)
• [PDB: HDAC1 Structure](https://www.rcsb.org/structure/1C3R)
• [HDAC inhibitors in neurodegeneration - Nature Reviews](https://pubmed.ncbi.nlm.nih.gov/22430045/)

Background

The study of Hdac1 Protein 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