Ring Finger Protein 182

Ring Finger Protein 182

Introduction

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">Ring Finger Protein 182</th>
</tr>
<tr>
<td class="label">Gene</td>
<td>| [@rnfa]</td>
</tr>
<tr>
<td class="label">Symbol</td>
<td>RNF182</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Ring Finger Protein 182</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>6p21.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>[RNF182](https://www.ncbi.nlm.nih.gov/gene/)</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q9Y2H9](https://www.uniprot.org/uniprot/Q9Y2H9)</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>Alzheimer's Disease, Huntington's Disease</td>
</tr>
</table>

Ring Finger Protein 182 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

.infobox .infobox-gene [@ubiquitin]

Overview

Ring Finger Protein 182

Introduction

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">Ring Finger Protein 182</th>
</tr>
<tr>
<td class="label">Gene</td>
<td>| [@rnfa]</td>
</tr>
<tr>
<td class="label">Symbol</td>
<td>RNF182</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Ring Finger Protein 182</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>6p21.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>[RNF182](https://www.ncbi.nlm.nih.gov/gene/)</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q9Y2H9](https://www.uniprot.org/uniprot/Q9Y2H9)</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>Alzheimer's Disease, Huntington's Disease</td>
</tr>
</table>

Ring Finger Protein 182 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

.infobox .infobox-gene [@ubiquitin]

Overview

RNF182 (Ring Finger Protein 182) is a neuronal RING-type E3 ubiquitin ligase that plays a critical role in protein quality control within the central nervous system. Predominantly expressed in brain tissue, RNF182 has garnered significant attention for its involvement in neurodegenerative diseases, particularly Alzheimer's disease (AD) and Huntington's disease (HD). The protein functions as an E3 ubiquitin ligase, facilitating the transfer of ubiquitin to specific substrate proteins, thereby marking them for degradation via the proteasome or autophagy pathways. Research has demonstrated that RNF182 expression levels are dysregulated in neurodegenerative conditions, suggesting a potential pathogenic role in disease progression.

Molecular Mechanism

RNF182 contains a conserved RING finger domain at its C-terminus, which serves as the catalytic core for E3 ubiquitin ligase activity. The RING domain coordinates two zinc ions and facilitates the transfer of ubiquitin from an E2 conjugating enzyme to the lysine residue of substrate proteins. This ubiquitination process can result in different outcomes depending on the ubiquitin chain topology:

• Monoubiquitination: Single ubiquitin addition, often regulating protein activity or localization
• Polyubiquitin chains: K48-linked chains typically target proteins for proteasomal degradation, while K63-linked chains serve non-degradative functions including signaling, DNA repair, and autophagy regulation

Protein Substrates

Tau Protein

RNF182-mediated ubiquitination of tau has been demonstrated in several studies. [Tau](/proteins/tau) is a microtubule-associated protein that forms neurofibrillary tangles in Alzheimer's disease. RNF182 ubiquitinates tau, potentially targeting it for proteasomal degradation. However, in AD brains, this process may be impaired or redirected toward pathological aggregation pathways.

Mutant Huntingtin

In Huntington's disease, RNF182 interacts with mutant [huntingtin](/genes/htt) (mHTT) protein containing expanded polyglutamine repeats. RNF182 may modulate mHTT toxicity through ubiquitination, though the functional consequences remain incompletely characterized. Some evidence suggests RNF182 activity may be protective, promoting mHTT clearance.

Other Substrates

• [NMDA](/entities/nmda-receptor) receptor subunits: Potential regulation of synaptic plasticity
• Apoptotic proteins: Involvement in neuronal survival pathways
• Cytoskeletal proteins: Possible roles in axonal transport

Expression Pattern

RNF182 demonstrates high expression in multiple brain regions:

• Cerebral [cortex](/brain-regions/cortex): Particularly abundant in layers II-III and V pyramidal [neurons](/entities/neurons)
• [Hippocampus](/brain-regions/hippocampus): High expression in CA1-CA3 pyramidal neurons and dentate gyrus granule cells
• Cerebellum: Present in Purkinje cells and cerebellar granule neurons
• Substantia nigra: Dopaminergic neurons express RNF182

Disease Associations

Alzheimer's Disease

RNF182 has been linked to Alzheimer's disease through multiple mechanisms:

Huntington's Disease

In Huntington's disease, RNF182 expression is altered in affected brain regions:

Other Neurodegenerative Conditions

• Parkinson's disease: Preliminary evidence suggests altered RNF182 expression
• Amyotrophic lateral sclerosis (ALS): Possible involvement in protein quality control pathways

Therapeutic Implications

RNF182 represents a potential therapeutic target for neurodegenerative diseases:

Small Molecule Modulators

• E3 ligase activators: Compounds enhancing RNF182 activity could promote clearance of pathological proteins
• E3 ligase inhibitors: Selective inhibitors may be useful if RNF182 activity proves pathogenic
• Ubiquitin chain-specific drugs: Modulators targeting specific ubiquitin chain types

Gene Therapy Approaches

• AAV-mediated RNF182 overexpression: Potential for enhancing protein clearance pathways
• CRISPR-based modulation: Targeting RNF182 expression levels

Combination Therapies

RNF182 modulators may synergize with:

• Proteasome inhibitors (for specific therapeutic contexts)
• [Autophagy](/entities/autophagy) enhancers (e.g., rapamycin, trehalose)
• Other E3 ligase modulators

Research Directions

Key unanswered questions about RNF182 include:

Key Publications

Background

The study of Ring Finger Protein 182 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.

See Also

• [Genes Index](/genes)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Huntington's Disease](/diseases/huntingtons)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Protein Quality Control](/mechanisms/protein-quality-control-network)
• [Tau Pathology Pathway](/mechanisms/tau-pathology)
• [Ubiquitin-Proteasome System](/mechanisms/ubiquitin-proteasome-system)

External Links

• [NCBI Gene: RNF182](https://www.ncbi.nlm.nih.gov/gene/)
• [UniProt: Q9Y2H9](https://www.uniprot.org/uniprot/Q9Y2H9)

References