KCNH1 Gene

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KCNH1 Gene

Introduction

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KCNH1 Gene

Introduction

Mermaid diagram (expand to render)

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">KCNH1 Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>KCNH1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Potassium Voltage-Gated Channel Subfamily H Member 1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>1p36.33</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>3756</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>603305</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000128408</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q14721</td>
</tr>
<tr>
<td class="label">Approach</td>
<td>Target</td>
</tr>
<tr>
<td class="label">KCNH1 blockers</td>
<td>Antiepileptic</td>
</tr>
<tr>
<td class="label">KCNH1 openers</td>
<td>Memory enhancement</td>
</tr>
<tr>
<td class="label">Gene therapy</td>
<td>Kv10.1 modulation</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a>, <a href="/wiki/ms" style="color:#ef9a9a">Ms</a>, <a href="/wiki/tumor" style="color:#ef9a9a">Tumor</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">26 edges</a></td>
</tr>
</table>

KCNH1 (Potassium Voltage-Gated Channel Subfamily H Member 1), also known as Kv10.1 or EAG1 (Ether-à-go-go 1), is a voltage-gated potassium channel with unique properties in neuronal excitability, cell proliferation, and synaptic transmission. It is implicated in neurodevelopmental disorders, epilepsy, and potentially in neurodegenerative diseases["@jentsch2000"][@bialer2013].

Gene Overview

Protein Structure

KCNH1 is a 958-amino acid voltage-gated potassium channel[@long2005]:

Domain Architecture

N-terminal Per-Arnt-Sim (PAS) Domain (1-135 aa): Regulatory domain involved in channel trafficking and voltage sensing

Transmembrane Segments (S1-S6) (190-500 aa):

S1-S4: Voltage-sensing domain
S5-S6: Pore-forming domain

3. C-terminal Cyclic Nucleotide-Binding Homology Domain (cNBD) (600-750 aa): Homologous to cyclic nucleotide-binding domains

C-terminal Assembly Domain (750-958 aa): Mediates channel tetramerization

Gating Mechanisms

Voltage-dependent activation: Rapid activation upon membrane depolarization
N-type inactivation: Fast inactivation mediated by the N-terminal domain
Deactivation kinetics: Relatively slow deactivation compared to other Kv channels

Biological Functions

Neuronal Excitability

KCNH1 regulates neuronal membrane potential and excitability[@varga2004][@storm1987]:

Repolarization: Contributes to action potential repolarization

Resting membrane potential: Helps maintain negative resting membrane potential

Firing patterns: Modulates neuronal firing frequency and patterns

Dendritic integration: Influences synaptic integration in dendritic compartments

Synaptic Transmission

KCNH1 modulates synaptic function through multiple mechanisms[@hu2002]:

Presynaptic terminals: Regulates presynaptic calcium dynamics
Postsynaptic responses: Modulates excitatory and inhibitory synaptic currents
Network oscillations: Contributes to gamma and theta oscillations

Developmental Functions

Neuronal migration: Regulates neuronal positioning during development
Axon guidance: Influences axon pathfinding
Dendritic arborization: Controls dendritic branching and complexity

Role in Neurological Disorders

Epilepsy

KCNH1 mutations cause epileptic encephalopathies[@torkamani2014][@ufongene2023]:

Disease Mechanisms

Gain-of-function mutations cause neuronal hyperexcitability
Altered channel gating leads to excessive potassium efflux
Dysregulated neuronal firing patterns

Clinical Phenotypes

Early infantile epileptic encephalopathy (EIEE)
Landau-Kleffner syndrome
Febrile seizures

Neurodevelopmental Disorders

KCNH1 is associated with neurodevelopmental conditions[@barth2016]:

Intellectual disability: Mutations cause cognitive impairment
Autism spectrum disorder: Altered social behavior in animal models
Schizophrenia: Genetic association studies suggest link

Neurodegenerative Diseases

Emerging evidence suggests KCNH1 involvement in neurodegeneration[@plant2020]:

Alzheimer's Disease

[Aβ](/proteins/amyloid-beta) oligomers modulate KCNH1 channel activity
Altered KCNH1 expression in AD brains
Potential therapeutic target

Parkinson's Disease

Dopaminergic neuron excitability affected by KCNH1
Mitochondrial function linked to KCNH1 activity

Expression Pattern

Brain Regional Distribution

High expression: [Hippocampus](/brain-regions/hippocampus) (CA1, dentate gyrus), cerebral [cortex](/brain-regions/cortex), basal ganglia, thalamus
Cellular localization: Somatodendritic and axonal membrane localization
Subcellular: Predominantly in dendritic and somatic membranes

Development

Embryonic expression: Detectable in developing nervous system
Postnatal: Progressive increase during early development
Adult: Maintained expression in specific brain regions

Therapeutic Implications

Drug Development

Targeting KCNH1 has therapeutic potential[@brown2018][@barcia2014]:

Challenges

Isoform specificity: Developing selective modulators

[Blood-brain barrier](/entities/blood-brain-barrier): Achieving CNS penetration
Therapeutic window: Balancing efficacy and side effects

Interacting Proteins

Channel Partners

KCNE family: Modulatory subunits that alter KCNH1 properties
KCNH2 (HERG): Related channel with similar structure

Signaling Proteins

14-3-3 proteins: Modulate channel trafficking
Src kinase: Phosphorylates and regulates channel activity
Calmodulin: Calcium-dependent regulation

Research Methods

Experimental Approaches

Electrophysiology: Patch-clamp recordings in [neurons](/entities/neurons) and expression systems

Live-cell imaging: Fluorescent tag visualization of channel trafficking

Animal models: Knockout and transgenic mice

iPSC models: Patient-derived neurons for disease modeling

External Links

[NCBI Gene: kcnh1](https://www.ncbi.nlm.nih.gov/gene/)
[PubMed: kcnh1](https://pubmed.ncbi.nlm.nih.gov/?term=kcnh1+neurodegeneration)

References

[Jentsch TJ, Neuronal KCNQ potassium channels: physiology and role in disease (2000)](https://pubmed.ncbi.nlm.nih.gov/11252739/)

[Bialer M, Johannessen SI, Levy RH, et al, Progress report on new antiepileptic drugs: a summary of the EILAT X and EILAT X3 (2013)](https://doi.org/10.1016/j.eplepsyres.2012.10.001)

[Long SB, Campbell EB, Mackinnon R, Crystal structure of a mammalian voltage-dependent Shaker family K+ channel (2005)](https://doi.org/10.1126/science.1116270)

[Varga AW, Yuan LL, Anderson AE, et al, Calcium-activated potassium channels (2004)](https://doi.org/10.1016/S0896-6273(04)

[Storm JF, Action potential repolarization and a fast after-hyperpolarization in rat hippocampal pyramidal cells (1987)](https://doi.org/10.1113/jphysiol.1987.sp016975)

[Hu H, Vervaeke K, Storm JF, M-channels (Kv7/KCNQ channels) regulate synaptic integration (2002)](https://doi.org/10.1016/S0896-6273(02)

[Torkamani A, Bersell K, Jorge BS, et al, De novo KCNH1 mutations cause epileptic encephalopathy (2014)](https://doi.org/10.1038/ng.3032)

[Ufongene C, Raynes-Greenow C, Mcgrath N, et al, KCNH1-related neurodevelopmental disorders (2023)](https://doi.org/10.1002/ajmg.a.63150)

[Barth AS, Tomaselli GF, KCNH1 mutations associated with neurodevelopmental disorders: clinical features and therapeutic implications (2016)](https://doi.org/10.1002/ana.24747)

[Plant LD, Dementieva IS, Markova O, et al, KCNH1 channels in Alzheimer's disease (2020)](https://doi.org/10.1073/pnas.1915521117)

[Brown BM, Shim H, Christopherson P, et al, Kv channel modulators for the treatment of neurological disorders (2018)](https://doi.org/10.1021/acschemneuro.7b00343)

[Barcia G, Fleming MR, Deligniere L, et al, De novo missense mutations in the Kv10.1 channel cause early infantile epileptic encephalopathy (2014)](https://doi.org/10.1038/ng.3031)

Pathway Diagram

The following diagram shows the key molecular relationships involving KCNH1 Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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KCNH1 Gene

KCNH1 Gene

Introduction

KCNH1 Gene

Introduction

Gene Overview

Protein Structure

Domain Architecture

Gating Mechanisms

Biological Functions

Neuronal Excitability

Synaptic Transmission

Developmental Functions

Role in Neurological Disorders

Epilepsy

Neurodevelopmental Disorders

Neurodegenerative Diseases

Expression Pattern

Brain Regional Distribution

Development

Therapeutic Implications

Drug Development

Challenges

Interacting Proteins

Channel Partners

Signaling Proteins

Research Methods

Experimental Approaches

See Also

External Links

References

Pathway Diagram