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.
Histone Deacetylase 1 (HDAC1) is a member of the class I histone deacetylases that plays a central role in epigenetic regulation of gene expression. 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.
| HDAC1 Protein |
|---|
| Protein Name | Histone Deacetylase 1 |
| Gene | [HDAC1](/genes/hdac1) |
| UniProt ID | [Q13547](https://www.uniprot.org/uniprot/Q13547) |
| PDB ID(s) | 1C3R, 4BKX, 5IGW |
| Molecular Weight | 55 kDa |
| Subcellular Localization | Nucleus |
| Protein Family | Class I HDACs |
| Expression | Ubiquitous, high in brain |
¶ 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
HDAC1 functions as part of multi-protein complexes:
- 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
- Histone deacetylation: Removes acetyl groups from H3/H4 tails
- Non-histone substrates: p53, NF-κB, STAT3, HSF1
- Reaction mechanism: Zinc-dependent hydrolysis of acetyl-lysine
- Chromatin compaction: Deacetylated histones bind DNA more tightly
- Gene silencing: Repression of target gene expression
- Developmental genes: Critical for development and differentiation
- Cell cycle: Regulation of p21, cyclin expression
- DNA repair: Modulates DNA damage response
- Apoptosis: Controls pro/anti-apoptotic gene expression
HDAC1 alterations in AD include:
- Activity changes: Reduced HDAC1 activity in AD brain
- Tau pathology: HDAC1 can deacetylate tau
- Memory formation: HDAC1 important for memory consolidation
- Therapeutic potential: HDAC1 activators may be beneficial
- α-Synuclein: HDAC1 affects α-syn aggregation
- Dopaminergic neurons: Neuroprotective role
- Mitochondrial function: Regulates PGC-1α expression
- Transcription dysregulation: HDAC1 contributes to transcriptional deficits
- mHTT effects: Mutant huntingtin affects HDAC1 localization
- Therapeutic targeting: HDAC inhibitors show promise in HD models
- TDP-43 pathology: HDAC1 activity affected
- Motor neuron survival: Protective role
- Gene expression: Dysregulation of survival genes
| 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 |
- Pan-inhibitor effects: Lack of selectivity
- Side effects: Cytopenia, fatigue, GI toxicity
- Blood-brain barrier: Variable penetration
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.