ATP1A3 Gene - Sodium-Potassium ATPase Alpha 3

ATP1A3 Gene - Sodium-Potassium ATPase Alpha 3

Introduction

Atp1A3 Gene Sodium Potassium Atpase Alpha 3 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

--- [@isgrigg2019]
title: ATP1A3 Gene [@heinzen2014]
description: Sodium-potassium ATPase alpha3 subunit - linked to dystonia-parkinsonism [@swoboda2010]

--- [@koch2019]

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#f0f0f0;">ATP1A3 Gene</th></tr>
<tr><td><strong>Symbol</strong></td><td>ATP1A3</td></tr>
<tr><td><strong>Full Name</strong></td><td>ATPase Na+/K+ Transporting Subunit Alpha 3</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>19q13.2</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td><a href="https://www.ncbi.nlm.nih.gov/gene/478" target="_blank">478</a></td></tr>
<tr><td><strong>OMIM</strong></td><td><a href="https://www.omim.org/entry/168500" target="_blank">168500</a></td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000105409</td></tr>
<tr><td><strong>UniProt ID</strong></td><td><a href="https://www.uniprot.org/uniprot/P13637" target="_blank">P13637</a></td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Rapid-onset Dystonia Parkinsonism, Alternating Hemiplegia of Childhood, Cerebellar Ataxia, [Parkinson's Disease](/diseases/parkinsons-disease)</td></tr>
</table>
</div>

Overview

ATP1A3 Gene - Sodium-Potassium ATPase Alpha 3

Introduction

Atp1A3 Gene Sodium Potassium Atpase Alpha 3 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

--- [@isgrigg2019]
title: ATP1A3 Gene [@heinzen2014]
description: Sodium-potassium ATPase alpha3 subunit - linked to dystonia-parkinsonism [@swoboda2010]

--- [@koch2019]

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#f0f0f0;">ATP1A3 Gene</th></tr>
<tr><td><strong>Symbol</strong></td><td>ATP1A3</td></tr>
<tr><td><strong>Full Name</strong></td><td>ATPase Na+/K+ Transporting Subunit Alpha 3</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>19q13.2</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td><a href="https://www.ncbi.nlm.nih.gov/gene/478" target="_blank">478</a></td></tr>
<tr><td><strong>OMIM</strong></td><td><a href="https://www.omim.org/entry/168500" target="_blank">168500</a></td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000105409</td></tr>
<tr><td><strong>UniProt ID</strong></td><td><a href="https://www.uniprot.org/uniprot/P13637" target="_blank">P13637</a></td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Rapid-onset Dystonia Parkinsonism, Alternating Hemiplegia of Childhood, Cerebellar Ataxia, [Parkinson's Disease](/diseases/parkinsons-disease)</td></tr>
</table>
</div>

Overview

ATP1A3 encodes the alpha3 subunit of the Na+/K+-ATPase, a P-type ATPase that actively transports sodium and potassium ions across the plasma membrane. This neuron-specific isoform is crucial for maintaining ionic gradients essential for neuronal excitability and function. Mutations in ATP1A3 cause several neurological disorders with prominent motor symptoms.

Function

The Na+/K+-ATPase is an essential electrogenic pump that maintains the resting membrane potential and regulates cellular volume.

Molecular Functions

• Ion Transport: Active transport of 3 Na+ out and 2 K+ into [neurons](/entities/neurons) per ATP hydrolyzed
• Membrane Potential: Establishes and maintains the neuronal resting membrane potential (-70 to -90 mV)
• Secondary Transport: Powers secondary active transporters including glutamate transporters
• Calcium Regulation: Indirectly affects calcium homeostasis through Na+/Ca2+ exchangers
• Neuronal Signaling: Critical for action potential generation and propagation
• Neurotransmitter Cycling: Essential for Na+-dependent neurotransmitter reuptake

Expression Pattern

In the brain, ATP1A3 is specifically expressed in:

• Basal Ganglia: High expression in striatum (caudate/putamen), globus pallidus, substantia nigra
• Thalamus: Moderate to high expression
• Brainstem: Prominent expression in brainstem nuclei
• Cerebellum: Purkinje cells and deep cerebellar nuclei
• [Cortex](/brain-regions/cortex): Layer 5 pyramidal neurons

Allen Brain Atlas Data

Gene Expression

• Basal ganglia - Very high expression in striatum and globus pallidus
• Thalamus - High expression in thalamic nuclei
• Brainstem - Very high expression in substantia nigra, red nucleus
• Cerebellum - High expression in Purkinje cells and deep nuclei
• Cortex - High expression in layer 5 pyramidal neurons

Single-Cell Expression

• Highest expression in striatal medium spiny neurons
• Very high expression in dopaminergic neurons (substantia nigra)
• High expression in Purkinje cells
• Moderate expression in cortical pyramidal neurons

Cell Type Specific Expression

• Neurons: Very high expression in most neuronal subtypes
• Glia: Low expression in astrocytes and microglia
• The neuron-specific expression explains the neurological phenotype

Brain Region Expression Table

Disease Associations

Rapid-onset Dystonia Parkinsonism (RDP)

• Clinical Features: Sudden onset of dystonia and parkinsonism, often triggered by stress
• Inheritance: Autosomal dominant with incomplete penetrance
• Mechanism: Loss-of-function mutations reduce Na+/K+-ATPase activity
• Treatment: Limited response to dopaminergic medications

Alternating Hemiplegia of Childhood (AHC)

• Clinical Features: Recurrent hemiplegic episodes, developmental delays, dystonia
• Inheritance: Predominantly de novo autosomal dominant mutations
• Mechanism: Severe loss-of-function mutations
• Treatment: Flunarizine may reduce episode frequency

Parkinson's Disease

• Association: ATP1A3 variants have been implicated in PD risk
• Mechanism: Reduced Na+/K+-ATPase function may contribute to neuronal vulnerability
• Therapeutic Target: Na+/K+-ATPase enhancers are being explored

Other Neurological Disorders

• CAPOS Syndrome: Cerebellar ataxia, areflexia, pes cavus, optic atrophy, sensorineural hearing loss
• Early Infantile Epileptic Encephalopathy: Severe mutations cause refractory seizures
• Dystonia 12: Various adult-onset dystonia phenotypes

Therapeutic Implications

Therapeutic Strategies

Drug Development

• Na+/K+-ATPase Activation: Search for small molecule activators
• Flunarizine: Calcium channel blocker used for AHC
• Dietary Approaches: Ketogenic diet may improve mitochondrial function

Key Publications

See Also

• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Dystonia](/diseases/dystonia)
• [Basal Ganglia](/brain-regions/basal-ganglia)
• [Substantia Nigra](/cell-types/substantia-nigra-dopaminergic-neurons)
• [Dystonia Treatment](/therapeutics/dystonia-treatment)

External Links

• [NCBI Gene: ATP1A3](https://www.ncbi.nlm.nih.gov/gene/478)
• [UniProt: ATP1A3 (P13637)](https://www.uniprot.org/uniprot/P13637)
• [Ensembl: ATP1A3](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000105409)
• [OMIM: ATP1A3](https://www.omim.org/entry/168500)
• [RDP Foundation](https://www.rdpfoundation.org/)

Background

The study of Atp1A3 Gene Sodium Potassium Atpase Alpha 3 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

Pathway Diagram

The following diagram shows the key molecular relationships involving ATP1A3 Gene - Sodium-Potassium ATPase Alpha 3 discovered through SciDEX knowledge graph analysis: