ClC-7 Chloride Channel

ClC-7 Chloride Channel

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">ClC-7 Chloride Channel</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>ClC-7 Chloride Channel</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>CLCN7</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>P51798</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~89 kDa</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Late endosomes, lysosomes</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>CLC chloride channel family</td>
</tr>
<tr>
<td class="label">Tissue Expression</td>
<td>Ubiquitous (brain, bone, kidney, liver)</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/cardiovascular" style="color:#ef9a9a">Cardiovascular</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">24 edges</a></td>
</tr>
</table>

Clc 7 Chloride Channel is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

[@stauber2012]

ClC-7 Chloride Channel

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">ClC-7 Chloride Channel</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>ClC-7 Chloride Channel</td>
</tr>
<tr>
<td class="label">Gene</td>
<td>CLCN7</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td>P51798</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~89 kDa</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Late endosomes, lysosomes</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>CLC chloride channel family</td>
</tr>
<tr>
<td class="label">Tissue Expression</td>
<td>Ubiquitous (brain, bone, kidney, liver)</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/cardiovascular" style="color:#ef9a9a">Cardiovascular</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">24 edges</a></td>
</tr>
</table>

Clc 7 Chloride Channel is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

[@stauber2012]

ClC-7 (Chloride Channel Protein 7) is a voltage-gated chloride channel belonging to the CLC chloride channel family, with critical intracellular localization in late endosomes and lysosomes Citation needed. It is widely expressed in [neurons](/entities/neurons) and peripheral tissues, where it plays essential roles in lysosomal function and cellular homeostasis Citation needed. [@weinert2020]

Overview

CLCN7 (Chloride Voltage-Gated Channel 7) is a gene located on chromosome 3p21.31. The encoded protein is a voltage-gated chloride channel involved in cellular ion homeostasis, acidification of intracellular compartments, and neuronal function. CLCN7 mutations are associated with neurodegenerative diseases and lysosomal storage disorders. [@kornak2001]

Basic Information

Structure

ClC-7 shares the canonical CLC channel architecture with several important features [Citation needed]:

• 18 transmembrane helices organized into two distinct domains
• Dimeric assembly forming two independent chloride conduction pathways
• Conserved gating glutamate (E166) essential for Cl-/H+ antiport mechanism
• Extended C-terminal domain with regulatory functions

Normal Function

Expression Pattern

ClC-7 exhibits broad expression throughout the body [Citation needed]:

• Brain: High expression in neurons, especially in [hippocampus](/brain-regions/hippocampus) and [cortex](/brain-regions/cortex)
• Bone: Osteoclasts highly express ClC-7 for bone resorption
• Kidney: Proximal tubule cells
• Liver: Hepatocytes
• Peripheral tissues: Moderate expression in most organs

Cellular Localization

ClC-7 is primarily an intracellular channel [Citation needed]:

• Late endosomes: Primary localization site in neurons
• Lysosomes: Critical for lysosomal acidification and function
• Osteoclast ruffled border: Required for bone resorption
• Synaptic vesicles: Potential role in synaptic function

Physiological Roles

ClC-7 serves essential physiological functions [Citation needed]:

Role in Disease

Neurodegeneration

ClC-7 dysfunction has been strongly implicated in neurodegenerative processes [Citation needed]:

Alzheimer's Disease

• Altered lysosomal function in AD neurons involves ClC-7 dysregulation Citation needed
• May contribute to [amyloid-beta](/proteins/amyloid-beta) accumulation through impaired lysosomal clearance Citation needed
• Potential therapeutic target for enhancing lysosomal function Citation needed

Parkinson's Disease

• Lysosomal dysfunction in PD involves CLCN7 variants Citation needed
• May affect [alpha-synuclein](/mechanisms/alpha-synuclein) clearance through altered autophagy Citation needed
• Interaction with GBA and other lysosomal genes in PD risk Citation needed

Lysosomal Storage Disorders

• Osteopetrosis: Dominant and recessive CLCN7 mutations cause severe skeletal sclerosis Citation needed
• Neuronal ceroid lipofuscinoses: ClC-7 dysfunction contributes to lipofuscin accumulation Citation needed
• Neurodegeneration with brain iron accumulation (NBIA): Possible modifier role Citation needed

Clinical Significance

Osteopetrosis

CLCN7 mutations cause different forms of osteopetrosis [Citation needed]:

• Autosomal dominant osteopetrosis (ADO): Typically milder, adult-onset
• Autosomal recessive osteopetrosis (ARO): Severe, infantile-onset with neurodegeneration

Neurodegeneration

ClC-7-related neurodegeneration involves [Citation needed]:

• Progressive lysosomal storage
• Neuronal dysfunction and death
• Seizures and developmental regression

Therapeutic Implications

Therapeutic strategies targeting ClC-7 include [Citation needed]:

Research Directions

Unresolved Questions

Key questions about ClC-7 remain [Citation needed]:

Emerging Research

Recent advances in ClC-7 research include [Citation needed]:

• Cryo-EM structures: Detailed architecture of ClC-7 and its dimerization
• iPSC models: Patient-derived neurons to study CLCN7 mutations
• Animal models: Knockout mice revealing tissue-specific functions
• Clinical trials: Gene therapy approaches for osteopetrosis

See Also

• [Proteins/Clcn7-Protein](/proteins/clcn7-protein) — This page

Background

The study of Clc 7 Chloride Channel 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.

External Links

• [PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
• [Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

Related Pages

• [CLCN7 Gene](/genes/clcn7)
• [ClC](/proteins/clcn6-protein)
• [ClC](/proteins/clcn3-protein)
• [ClC](/proteins/clcn4-protein)
• [Endosomal](/mechanisms/dopaminergic-neuron-vulnerability)
• [Lysosomal Storage Disorders](/diseases/lysosomal-storage-disorders)
• [Osteopetrosis](/mechanisms/dopaminergic-neuron-vulnerability)

References