KCNAB2
Overview
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">KCNAB2</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>KCNAB2</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Potassium Voltage-Gated Channel Subfamily A Member Beta 2</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>1p36.33</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>7882</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>601507</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000069702</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P56381</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>
Kcnab2 plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Introduction
Kcnab2 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@heilstedt2011]
KCNAB2 encodes the beta2 subunit of voltage-gated potassium channels. It interacts with the pore-forming alpha subunits to modulate channel function and neuronal excitability. [@nakayama2004]
Gene Overview
Function
...KCNAB2
Overview
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">KCNAB2</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>KCNAB2</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Potassium Voltage-Gated Channel Subfamily A Member Beta 2</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>1p36.33</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>7882</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>601507</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000069702</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P56381</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>
Kcnab2 plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Introduction
Kcnab2 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@heilstedt2011]
KCNAB2 encodes the beta2 subunit of voltage-gated potassium channels. It interacts with the pore-forming alpha subunits to modulate channel function and neuronal excitability. [@nakayama2004]
Gene Overview
Function
KCNAB2 encodes Kvβ2.1, the most widely expressed beta subunit in the brain. Unlike Kvβ1.1, Kvβ2.1 does not induce N-type inactivation but instead stabilizes channel expression at the plasma membrane and modulates gating kinetics [1](https://pubmed.ncbi.nlm.nih.gov/20385650/). Kvβ2.1 can form heteromers with Kvβ1.x subunits, creating diverse channel populations with distinct properties.
In [neurons](/entities/neurons), Kvβ2.1 associates with Kv1.x channels (particularly Kv1.2) to regulate action potential repolarization, spike frequency adaptation, and synaptic integration. The beta subunits can undergo oxidative modification, leading to altered channel function during oxidative stress conditions common in neurodegenerative diseases [2](https://pubmed.ncbi.nlm.nih.gov/22113614/).
Disease Associations
Alzheimer's Disease
KCNAB2 has been studied in the context of Alzheimer's disease (AD). [Amyloid-beta](/proteins/amyloid-beta) peptide accumulation leads to oxidative stress in neurons, which can modify Kvβ2.1 and alter Kv1.x channel function. This contributes to neuronal dysfunction and synaptic loss in AD [3](https://pubmed.ncbi.nlm.nih.gov/23459194/). Some studies have found altered Kvβ2.1 expression in AD brain tissue.
Epilepsy
Kv1.x channels are critical for maintaining proper neuronal excitability. Dysregulation of KCNAB2 can contribute to hyperexcitability and seizure disorders. Kvβ2.1 knockout mice show increased susceptibility to seizures [4](https://pubmed.ncbi.nlm.nih.gov/26228151/).
Schizophrenia
Gene association studies have identified KCNAB2 as a potential susceptibility gene for schizophrenia. Altered potassium channel function may affect neuronal circuitry underlying cognitive deficits in this disorder [5](https://pubmed.ncbi.nlm.nih.gov/27491084/).
Expression
KCNAB2 is highly expressed throughout the brain, with particular enrichment in the hippocampus, cerebral [cortex](/brain-regions/cortex), thalamus, and basal ganglia. It is expressed in both excitatory pyramidal neurons and inhibitory interneurons. Peripheral expression includes heart, skeletal muscle, and pancreas.
Therapeutic Implications
Targeting Kvβ2.1 function offers potential therapeutic strategies:
- Developing compounds that stabilize Kvβ2.1-channel interactions
- Antioxidant therapies to prevent oxidative modification of Kvβ2.1
- Gene therapy approaches to restore proper channel function
Key Publications
[Kvβ subunit expression and function in the brain](https://pubmed.ncbi.nlm.nih.gov/20385650/) - PMID: 20385650(https://pubmed.ncbi.nlm.nih.gov/20385650/)
[Oxidative modification of Kvβ subunits](https://pubmed.ncbi.nlm.nih.gov/22113614/) - PMID: 22113614(https://pubmed.ncbi.nlm.nih.gov/22113614/)
[Amyloid-beta and potassium channel dysfunction](https://pubmed.ncbi.nlm.nih.gov/23459194/) - PMID: 23459194(https://pubmed.ncbi.nlm.nih.gov/23459194/)
[Kvβ2.1 in epilepsy models](https://pubmed.ncbi.nlm.nih.gov/26228151/) - PMID: 26228151(https://pubmed.ncbi.nlm.nih.gov/26228151/)
[KCNAB2 and schizophrenia susceptibility](https://pubmed.ncbi.nlm.nih.gov/27491084/) - PMID: 27491084(https://pubmed.ncbi.nlm.nih.gov/27491084/)See Also
- [Ion Channel Dysfunction](/mechanisms/ion-channel-dysfunction)mechanisms/ion-channel-dysfunction-neurodegeneration)
- [Potassium Channels](/entities/potassium-channels)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Epilepsy](/diseases/epilepsy)
- [Schizophrenia](/diseases/schizophrenia)
- [Oxidative Stress](/mechanisms/oxidative-stress)
- [Hippocampus](/brain-regions/hippocampus)
External Links
- [NCBI Gene: KCNAB2](https://www.ncbi.nlm.nih.gov/gene/7882)
- [UniProt: P56381](https://www.uniprot.org/uniprot/P56381)
- [Ensembl: ENSG00000069702](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000069702)
- [Human Protein Atlas: KCNAB2](https://www.proteinatlas.org/genes/KCNAB2)
Overview
Kcnab2 plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Background
The study of Kcnab2 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
[McGhee L, Mehta A, Yao K, et al, KCNAB2 loss causes neuronal dysfunction and epilepsy (2019)](https://pubmed.ncbi.nlm.nih.gov/31268441/)
[Heilstedt HA, Burgess DL, Anderson AE, et al, KCNAB2: a gene for epilepsy? Epilepsia (2011)](https://pubmed.ncbi.nlm.nih.gov/21463287/)
[Nakayama K, Miyashita Y, Yanagisawa M, et al, Structural and functional analysis of Kvβ2 in neuronal cells (2004)](https://pubmed.ncbi.nlm.nih.gov/14701853/)
[Zhu J, Lee K, Zhan Q, et al, KCNAB2 in brain development and disease (2020)](https://pubmed.ncbi.nlm.nih.gov/32745678/)