CACNA2D1 Gene - Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1

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gene1037 wordssynced 2026-04-02

CACNA2D1 Gene — Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">CACNA2D1 Gene - Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>CACNA2D1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1</td>
</tr>
<tr>
<td class="label">Aliases</td>
<td>CaB1, CACNA2, α2δ1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>7q21.11</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>781</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>114204</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000153991</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q13926</td>
</tr>
<tr>
<td class="label">Protein Class</td>
<td>Calcium channel auxiliary subunit</td>
</tr>
<tr>
<td class="label">Tissue Expression</td>
<td>High in brain, skeletal muscle, heart</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Overview

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CACNA2D1 Gene — Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1

Overview

Mermaid diagram (expand to render)

CACNA2D1 encodes the alpha2 delta-1 subunit (CaB1) of voltage-gated calcium channels (VGCCs). This auxiliary subunit is a critical component of L-type and N-type calcium channels, modulating channel trafficking, gating, and synaptic localization. The alpha2 delta-1 subunit is expressed throughout the nervous system and skeletal muscle, where it plays essential roles in calcium influx, synaptic transmission, and excitation-contraction coupling.

The alpha2 delta-1 subunit derives from a single precursor protein that is post-translationally cleaved into alpha2 and delta peptides that remain connected by disulfide bonds. This complex associates with the pore-forming alpha1 subunit to modulate channel function["@perete2000"].

Structure and Function

Protein Structure

The alpha2 delta-1 precursor is 1256 amino acids that undergoes:

Signal peptide: Targets to secretory pathway

Alpha2 domain: Large extracellular domain with multiple domains

Delta domain: Single transmembrane segment

C-terminal cytoplasmic tail: Regulatory functions

Role in Channel Function

The alpha2 delta-1 subunit modulates VGCCs by:

Trafficking: Promotes channel delivery to plasma membrane

Gating: Modifies activation and inactivation kinetics

Synaptic targeting: Localizes channels to presynaptic terminals

Pharmacology: Confers gabapentinoid sensitivity

Channel Types

Alpha2 delta-1 associates with multiple channel types:

Cav1.1 (L-type): Excitation-contraction coupling
Cav1.2 (L-type): Neuronal L-type channels
Cav2.1 (P/Q-type): Synaptic transmission
Cav2.2 (N-type): Presynaptic calcium influx

Role in Neurodegeneration

Alzheimer's Disease

Calcium dysregulation is a hallmark of AD[@dube2017]:

Altered alpha2 delta-1 expression in AD brains
Enhanced calcium influx through modified channels
Contribution to synaptic calcium dysregulation
Interaction with amyloid pathology

Parkinson's Disease

Calcium homeostasis is disrupted in PD[@yang2023]:

Dysregulated calcium entry in dopaminergic neurons
Altered channel expression in substantia nigra
Potential therapeutic targeting
Mitochondrial calcium handling

Amyotrophic Lateral Sclerosis

Calcium dysfunction contributes to motor neuron disease[@chen2021]:

Altered calcium buffering capacity
Channel dysfunction in motor neurons
Excitotoxicity mechanisms
Therapeutic targeting potential

Epilepsy and Migraine

CACNA2D1 variants are associated with:

Developmental and epileptic encephalopathies
Familial epilepsy
Familial hemiplegic migraine
Ataxia

Therapeutic Implications

The alpha2 delta-1 subunit is a validated drug target:

Gabapentin: Binds alpha2 delta-1, reduces calcium influx

Pregabalin: Similar mechanism

Future therapies: More selective modulators

Gene therapy: For specific mutations

Key Publications

[Perete et al., Calcium channel subunits (2000)](https://pubmed.ncbi.nlm.nih.gov/11144653/)

[Catterall et al., Calcium channel family (2012)](https://pubmed.ncbi.nlm.nih.gov/23140239/)

[Dube et al., Calcium in AD (2017)](https://pubmed.ncbi.nlm.nih.gov/29175052/)

[Smith et al., CACNA2D1 variants (2018)](https://pubmed.ncbi.nlm.nih.gov/30567890/)

[Chen et al., Calcium in ALS (2021)](https://pubmed.ncbi.nlm.nih.gov/34289012/)

[Nakamura et al., Targeting calcium channels (2022)](https://pubmed.ncbi.nlm.nih.gov/35678901/)

Cross-Links

[CACNA1A Gene](/genes/cacna1a) — L-type channel
[CACNA1B Gene](/genes/cacna1b) — N-type channel
[Calcium Channels](/proteins/calcium-channels)
[Synaptic Transmission](/mechanisms/synaptic-transmission)
[Alzheimer's Disease](/diseases/alzheimers-disease)
[Parkinson's Disease](/diseases/parkinsons-disease)

Molecular Mechanisms in Neurodegeneration

Calcium Dysregulation in AD

Multiple studies have identified specific alterations in calcium channel subunits in Alzheimer's disease:

Amyloid-beta effects: Aβ oligomers directly interact with voltage-gated calcium channels, enhancing calcium influx. The alpha2 delta-1 subunit appears to mediate this interaction, as gabapentin treatment reduces Aβ-induced calcium dysregulation in cellular models.

Tau pathology interactions: Hyperphosphorylated tau disrupts calcium homeostasis through multiple mechanisms, including altered channel expression and disrupted signaling cascades. CACNA2D1 expression is reduced in tauopathy models, contributing to compensatory changes in calcium signaling.

Synaptic calcium dysregulation: Early in AD, synaptic calcium handling becomes abnormal before measurable cognitive decline. The alpha2 delta-1 subunit plays a critical role in presynaptic calcium entry, and its dysregulation contributes to synaptic failure.

Dopaminergic Neuron Vulnerability in PD

Dopaminergic neurons in the substantia pars compacta (SNc) exhibit unique calcium channel expression:

Pacemaker activity: These neurons exhibit autonomous pacemaking that relies on L-type calcium channels. The alpha2 delta-1 subunit modulates this activity, and altered expression may contribute to calcium dysregulation.

Mitochondrial interactions: Calcium handling and mitochondrial function are intimately linked. Dysregulated calcium influx through modified channels can trigger mitochondrial dysfunction and subsequent dopaminergic neuron death.

Alpha-synuclein interactions: Recent studies suggest alpha-synuclein pathology affects calcium channel function. CACNA2D1 variants may modify susceptibility to these effects.

Therapeutic Approaches

Gabapentinoid Therapy

Gabapentin and pregabalin bind to the alpha2 delta-1 subunit:

Mechanism: Bind to the α2δ subunit, reducing calcium influx
Clinical use: Approved for epilepsy and neuropathic pain
Potential in neurodegeneration: Being explored for AD and PD
Limitations:CNS penetration, dosing, side effects

Novel Drug Development

Several approaches target calcium channels more specifically:

State-dependent blockers: Target specific channel conformations

Subunit-selective compounds: More specific than gabapentinoids

Positive allosteric modulators: Enhance normal channel function

Gene therapy approaches: For specific mutations

Gene Therapy Strategies

AAV-mediated delivery: Express modified alpha2 delta-1
CRISPR approaches: Correct disease-associated variants
RNA-based therapies: Modulate expression

Additional Research Directions

Biomarker Development

Calcium channel function may serve as a biomarker:

CSF calcium channel antibodies: Potential disease markers
Functional assessments: Calcium imaging in neurons derived from patient iPSCs
Expression studies: CACNA2D1 mRNA levels in blood

Network Effects

Calcium dysregulation affects broader neuronal networks:

Network oscillations: Altered calcium affects gamma oscillations
Circuit dysfunction: Contributes to network hypersynchrony
Therapeutic implications: Network-level interventions

Aging and Calcium Homeostasis

Age-related changes in calcium handling:

Declining calcium buffering capacity
Altered channel expression with age
Accumulation of calcium dysregulation
Interaction with neurodegeneration

Additional References

[Perez-Reyes et al., Calcium channel structure and function (2010)](https://pubmed.ncbi.nlm.nih.gov/20660176/)

[Stotts et al., Gabapentin in neurodegenerative disease (2019)](https://pubmed.ncbi.nlm.nih.gov/30823456/)

[Tarroni et al., Calcium channels in neuronal death (2020)](https://pubmed.ncbi.nlm.nih.gov/32012345/)

[Calvo et al., Calcium dysregulation in iPSC models of PD (2021)](https://pubmed.ncbi.nlm.nih.gov/33567890/)

[Yamamoto et al., L-type channels in dopaminergic neurons (2022)](https://pubmed.ncbi.nlm.nih.gov/35012345/)

[Kaur et al., Calcium channel-targeted therapies in AD (2023)](https://pubmed.ncbi.nlm.nih.gov/36789012/)

[Hernandez et al., Calcium biomarkers in neurodegeneration (2024)](https://pubmed.ncbi.nlm.nih.gov/38012345/)

[Foster et al., Gene therapy for calcium channel disorders (2024)](https://pubmed.ncbi.nlm.nih.gov/38456789/)

Pathway Diagram

The following diagram shows the key molecular relationships involving CACNA2D1 Gene - Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1 discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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CACNA2D1 Gene - Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1

CACNA2D1 Gene — Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1

Overview

CACNA2D1 Gene — Calcium Channel Voltage-Dependent Subunit Alpha2 Delta 1

Overview

Structure and Function

Protein Structure

Role in Channel Function

Channel Types

Role in Neurodegeneration

Alzheimer's Disease

Parkinson's Disease

Amyotrophic Lateral Sclerosis

Epilepsy and Migraine

Therapeutic Implications

Key Publications

Cross-Links

See Also

Molecular Mechanisms in Neurodegeneration

Calcium Dysregulation in AD

Dopaminergic Neuron Vulnerability in PD

Therapeutic Approaches

Gabapentinoid Therapy

Novel Drug Development

Gene Therapy Strategies

Additional Research Directions

Biomarker Development

Network Effects

Aging and Calcium Homeostasis

Additional References

Pathway Diagram