KCNG4 Gene

KCNG4 Gene

Introduction

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">KCNG4 Gene</th>
</tr>
<tr>
<td class="label">Gene symbol</td>
<td>KCNG4</td>
</tr>
<tr>
<td class="label">Protein</td>
<td>Kv6.4 (voltage-gated potassium channel modifier subunit)</td>
</tr>
<tr>
<td class="label">Chromosomal location</td>
<td>16q24.1</td>
</tr>
<tr>
<td class="label">NCBI Gene</td>
<td>[3862](https://www.ncbi.nlm.nih.gov/gene/3862)</td>
</tr>
<tr>
<td class="label">Ensembl</td>
<td>ENSG00000168453</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>[Q9Y698](https://www.uniprot.org/uniprotkb/Q9Y698/entry)</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

KCNG4 encodes Kv6.4, a so-called electrically silent voltage-gated potassium channel subunit that cannot form a functional channel alone but reshapes channel behavior when co-assembled with Kv2 family pore-forming subunits such as [KCNB1](/genes/kcnb1) and [KCNB2](/genes/kcnb2).[@ottschytsch2002][@bocksteins2016] In [neurons](/entities/neurons), this modulatory role can shift activation/inactivation properties and therefore tune spike timing, repetitive firing, and network excitability.[@bocksteins2016][@martens2014]

Overview

KCNG4 Gene

Introduction

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">KCNG4 Gene</th>
</tr>
<tr>
<td class="label">Gene symbol</td>
<td>KCNG4</td>
</tr>
<tr>
<td class="label">Protein</td>
<td>Kv6.4 (voltage-gated potassium channel modifier subunit)</td>
</tr>
<tr>
<td class="label">Chromosomal location</td>
<td>16q24.1</td>
</tr>
<tr>
<td class="label">NCBI Gene</td>
<td>[3862](https://www.ncbi.nlm.nih.gov/gene/3862)</td>
</tr>
<tr>
<td class="label">Ensembl</td>
<td>ENSG00000168453</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>[Q9Y698](https://www.uniprot.org/uniprotkb/Q9Y698/entry)</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

KCNG4 encodes Kv6.4, a so-called electrically silent voltage-gated potassium channel subunit that cannot form a functional channel alone but reshapes channel behavior when co-assembled with Kv2 family pore-forming subunits such as [KCNB1](/genes/kcnb1) and [KCNB2](/genes/kcnb2).[@ottschytsch2002][@bocksteins2016] In [neurons](/entities/neurons), this modulatory role can shift activation/inactivation properties and therefore tune spike timing, repetitive firing, and network excitability.[@bocksteins2016][@martens2014]

Overview

KCNG4 belongs to the Kv6 branch of modulatory subunits (Kv6.1-Kv6.4). These proteins are best understood as excitability set-point regulators rather than principal conductance carriers. By changing how Kv2-containing channels respond to depolarization, KCNG4 can alter the threshold and temporal structure of neuronal firing that feeds into vulnerability-relevant pathways in [Alzheimer's disease](/diseases/alzheimers-disease), [Parkinson's disease](/diseases/parkinsons-disease), and related disorders where membrane excitability, calcium stress, and synaptic failure interact.[@bocksteins2016][@surmeier2017]

Gene Information

Molecular Function and Channel Assembly

Silent-subunit logic

Kv6.4 does not efficiently traffic to the surface as a homomer and does not generate a canonical delayed-rectifier current by itself.[@ottschytsch2002][@bocksteins2016] Its biologic role emerges after heteromerization with Kv2 alpha subunits, where it can shift voltage dependence and inactivation kinetics.[@ottschytsch2002][@bocksteins2016]

Why this matters for neuron stress biology

Excitability homeostasis is a central determinant of neuronal energy demand and calcium entry. Small shifts in repolarization reserve can modify burst probability and firing persistence, which then couples to mitochondrial workload, oxidative stress signaling, and proteostasis pressure linked to [selective neuronal vulnerability](/mechanisms/selective-neuronal-vulnerability).[@martens2014][@surmeier2017]

Expression and Neurobiological Context

Transcriptomic and catalog resources indicate brain expression, with enrichment patterns varying by region and developmental context.[@ncbi2026][@uniprot2026] KCNG4 should be interpreted as a modifier node in a broader conductance network that includes voltage-gated sodium channels, Kv2 channels, and calcium channels.

In practical wiki terms, KCNG4 is most useful when cross-modeled with:

• [KCNB1](/genes/kcnb1) and [KCNB2](/genes/kcnb2) as direct assembly partners
• [CACNA1H](/genes/cacna1h) and related calcium-channel genes in excitability-calcium coupling
• [Calcium Channel Dysfunction in Neurodegeneration](/mechanisms/calcium-channel-dysfunction-neurodegeneration) to connect membrane events with downstream degeneration cascades

Disease-Relevant Evidence

Human genetic signals

Human studies suggest KCNG4 variation can influence excitability-linked phenotypes. Reported associations include variant-level links to altered pain excitability phenotypes, supporting the concept that KCNG4 has measurable physiologic impact in humans.[@lee2020] More recent human genetics work has also explored associations between potassium-channel network variation and neurologic phenotypes, including headache spectrum traits.[@reciopoveda2024]

Translational interpretation for neurodegeneration

Direct causative links between KCNG4 and major neurodegenerative syndromes remain limited, but the mechanistic rationale is strong: KCNG4 modulates electrophysiologic programs that influence calcium loading and activity-dependent stress, which are shared drivers across [Alzheimer's disease](/diseases/alzheimers-disease), [Parkinson's disease](/diseases/parkinsons-disease), [amyotrophic lateral sclerosis](/diseases/amyotrophic-lateral-sclerosis), and [frontotemporal dementia](/diseases/frontotemporal-dementia).[@martens2014][@surmeier2017]

Therapeutic and Research Implications

• Network-level targeting: KCNG4 is better viewed as a context-dependent modifier target than a stand-alone lesion gene.[@bocksteins2016][@martens2014]
• Biomarker logic: KCNG4 genotype or expression may eventually serve as a stratifier for excitability-dominant endophenotypes.[@lee2020][@reciopoveda2024]
• Combination strategy: strongest translational opportunities likely combine potassium-channel modulation with calcium-stress and proteostasis interventions.[@martens2014][@surmeier2017]

See Also

• [KCNB1 Gene](/genes/kcnb1)
• [KCNB2 Gene](/genes/kcnb2)
• [CACNA1H Gene](/genes/cacna1h)
• [Selective Neuronal Vulnerability](/mechanisms/selective-neuronal-vulnerability)
• [Calcium Channel Dysfunction in Neurodegeneration](/mechanisms/calcium-channel-dysfunction-neurodegeneration)

External Links

• [NCBI Gene: KCNG4](https://www.ncbi.nlm.nih.gov/gene/3862)
• [UniProt: Q9Y698 (KCNG4)](https://www.uniprot.org/uniprotkb/Q9Y698/entry)
• [Ensembl: KCNG4](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000168453)

Background

The study of Kcng4 Gene 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