HDAC5 Protein is a protein involved in key cellular signaling pathways relevant to neurodegenerative diseases. This page provides comprehensive information about its structure, normal biological function, and role in disease pathogenesis.
HDAC5 Protein participates in critical cellular processes that, when dysregulated, contribute to neurodegeneration. Understanding this protein's function is essential for developing therapeutic interventions for Alzheimer's disease, Parkinson's disease, and related conditions.
| HDAC5 Protein | |
|---|---|
| Protein Name | HDAC5 |
| Gene | [HDAC5](/genes/hdac5) |
| UniProt ID | Q9UQL6 |
| PDB Structure | 2VQM, 5A2U, 5VX9 |
| Molecular Weight | 112 kDa |
| Subcellular Localization | Nucleus, Cytoplasm (signal-dependent) |
| Protein Family | Class IIa histone deacetylases |
HDAC5 has a similar architecture to HDAC4: an N-terminal catalytic domain and C-terminal regulatory region with NLS and NES sequences. It shuttles between nucleus and cytoplasm in response to cellular signals, particularly calcium and cAMP signaling. The protein interacts with various transcription factors including MEF2, SRF, and NF-κB.
HDAC5 regulates gene expression through histone deacetylation and transcriptional repression. It shuttles between cytoplasm and nucleus in response to cellular signals. In neurons, HDAC5 regulates synaptic plasticity, neuronal differentiation, and stress responses. It plays critical roles in memory formation and emotional behavior through epigenetic regulation.
HDAC5 is altered in AD brains, with affected expression and localization. HDAC5 regulates genes important for neuronal survival and synaptic function, and modulates Aβ-induced neurotoxicity. In depression, HDAC5 is downregulated in key brain regions. HDAC5 is considered a potential therapeutic target.
HDAC5 modulators are being explored for neurodegenerative and psychiatric disorders. Similar to HDAC4, HDAC inhibitors including Vorinostat and Entinostat (more selective for Class I) show benefits. Challenges include achieving isoform selectivity and brain penetration.