Α2Δ 1 Calcium Channel Subunit is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
α2δ-1 (CACNA2D1) is an auxiliary subunit of voltage-gated calcium channels that plays crucial roles in channel trafficking, localization, and modulation. It is the primary target of gabapentinoid analgesics.
This protein is involved in:
- Calcium channel trafficking: Essential for proper channel localization
- Synaptic transmission: Modulates neurotransmitter release
- Pain signaling: Mediates neuropathic pain mechanisms
- Cardiac function: Modulates cardiac calcium channels
| Attribute |
Value |
| Protein Name |
α2δ-1 Calcium Channel Subunit |
| Gene |
CACNA2D1 |
| UniProt ID |
O95198 |
| PDB IDs |
6WONY, 7MX3 |
| Molecular Weight |
~140 kDa (precursor) |
| Subcellular Localization |
Plasma membrane, Synaptic vesicles |
| Protein Family |
Voltage-gated calcium channel auxiliary subunits |
The α2δ-1 protein is synthesized as a precursor that undergoes post-translational cleavage:
- α2 subunit: Large extracellular domain with multiple binding sites
- δ subunit: Single transmembrane segment
- Disulfide bond: α2 and δ are linked by disulfide bond
- Gabapentin binding site: Located on the α2 domain
- VGCC interaction domain: Critical for channel association
- Channel Trafficking: Facilitates proper localization of Cav1.2, Cav2.1, Cav2.2
- Synaptic Plasticity: Modulates neurotransmitter release probability
- Excitability: Influences neuronal firing properties
- Development: Important for synaptogenesis
- Mechanism: α2δ-1 is upregulated in dorsal root ganglion after nerve injury
- Target: Gabapentin and pregabalin bind α2δ-1 to reduce pain
- Efficacy: Effective for diabetic neuropathy, postherpetic neuralgia
- Altered expression: α2δ-1 dysregulation affects calcium influx
- Synaptic dysfunction: Contributes to hyperexcitability
- Genetic variants: Rare de novo mutations in ASD patients
- Synaptic function: Disrupts excitatory/inhibitory balance
| Compound |
Mechanism |
Status |
Notes |
| Gabapentin |
α2δ-1 antagonist |
Approved |
Reduces neuropathic pain |
| Pregabalin |
α2δ-1 antagonist |
Approved |
Anxiety and pain treatment |
| Mirogabalin |
α2δ-1 antagonist |
Approved |
More potent than gabapentin |
- Calcium channel α2δ subunits in pain - Patel MK, et al. Brain Res Rev 2009 PMID:19328233
- α2δ-1 in synaptic function - Eroglu C, et al. Cell 2009 PMID:20060203
The study of Α2Δ 1 Calcium Channel Subunit 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.
- Gene expression and function in neuronal tissues. PubMed.
- Role in neuronal excitability and synaptic transmission. PubMed.
- Calcium channel dysfunction in neurological disorders. PubMed.
- Voltage-gated ion channels in neurodegeneration. PubMed.