WRN — Werner Syndrome RecQ Like Helicase

WRN — Werner Syndrome RecQ Like Helicase

Introduction

Wrn — Werner Syndrome Recq Like Helicase is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<!-- Gene Infobox -->
<div class="infobox infobox-gene">
<div class="infobox-header">WRN</div>
<div class="infobox-content">
<table>
<tr><th>Full Name</th><td>Werner Syndrome RecQ Like Helicase</td></tr>
<tr><th>Synonyms</th><td>WRN, RECQL2, WRN1</td></tr>
<tr><th>Chromosome</th><td>8p12</td></tr>
<tr><th>NCBI Gene ID</th><td>7496</td></tr>
<tr><th>OMIM</th><td>604611</td></tr>
<tr><th>Ensembl ID</th><td>ENSG00000113240</td></tr>
<tr><th>UniProt ID</th><td>Q9H2L9</td></tr>
<tr><th>Protein</th><td>[WRN Protein](/proteins/wrn-protein)</td></tr>
<tr><th>Associated Diseases</th><td>Werner Syndrome, Alzheimer's Disease, Parkinson's Disease, Progeria, Cancer</td></tr>
</table>
</div>
</div>

Overview

WRN — Werner Syndrome RecQ Like Helicase

Introduction

Wrn — Werner Syndrome Recq Like Helicase is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<!-- Gene Infobox -->
<div class="infobox infobox-gene">
<div class="infobox-header">WRN</div>
<div class="infobox-content">
<table>
<tr><th>Full Name</th><td>Werner Syndrome RecQ Like Helicase</td></tr>
<tr><th>Synonyms</th><td>WRN, RECQL2, WRN1</td></tr>
<tr><th>Chromosome</th><td>8p12</td></tr>
<tr><th>NCBI Gene ID</th><td>7496</td></tr>
<tr><th>OMIM</th><td>604611</td></tr>
<tr><th>Ensembl ID</th><td>ENSG00000113240</td></tr>
<tr><th>UniProt ID</th><td>Q9H2L9</td></tr>
<tr><th>Protein</th><td>[WRN Protein](/proteins/wrn-protein)</td></tr>
<tr><th>Associated Diseases</th><td>Werner Syndrome, Alzheimer's Disease, Parkinson's Disease, Progeria, Cancer</td></tr>
</table>
</div>
</div>

Overview

WRN (Werner Syndrome RecQ Like Helicase) is a RecQ family DNA helicase/exonuclease that plays essential roles in DNA replication, repair, and recombination. WRN is unique among RecQ helicases in possessing both 3'->5' helicase and 3'->5' exonuclease activities. Biallelic mutations in WRN cause Werner syndrome, a rare autosomal recessive disorder characterized by premature aging (progeria), beginning in adolescence/early adulthood. The WRN protein is critically involved in maintaining genomic integrity in [neurons](/entities/neurons) and other cell types, and its dysfunction contributes to age-related neurodegeneration.

Normal Function

WRN is a multifunctional DNA metabolic enzyme:

Enzymatic Activities

Key DNA Repair Pathways

• Base excision repair (BER): Processing of oxidative DNA damage
• DNA double-strand break repair: Homologous recombination and NHEJ
• Telomere maintenance: Prevents telomere dysfunction
• Replication fork restart: Resolves stalled replication forks

Brain Expression

• Highest expression in neural stem cells and progenitors
• Moderate expression in mature neurons
• Reduced expression with aging

Role in Neurodegenerative Diseases

Werner Syndrome

The classic phenotype of WRN deficiency:

• Premature aging beginning in teens
• Short stature, graying/hair loss
• Type 2 diabetes, cataracts, osteoporosis
• Cancer predisposition (sarcomas)
• Accelerated neurodegeneration in later decades

Alzheimer's Disease

WRN involvement in AD:

• Reduced WRN expression in AD brain
• Accumulation of oxidative DNA damage
• Impaired repair of abasic sites and strand breaks
• Telomere shortening in AD neurons
• WRN may interact with [tau](/proteins/tau) pathology

Parkinson's Disease

• WRN mutations/ polymorphisms may increase PD risk
• Mitochondrial DNA repair deficiency in PD
• WRN translocation to mitochondria under stress

ALS

• WRN dysfunction may contribute to motor neuron vulnerability
• DNA damage accumulates in ALS motor neurons
• Interactions with FUS and [TDP-43](/proteins/tdp-43) pathology

Normal Aging

• WRN expression and activity decline with age
• Somatic WRN mutations accumulate
• Contributes to age-related genomic instability

Therapeutic Targeting

Strategies

| Approach | Rationale | Status |
|----------|-----------|--------|
| Antioxidants | Reduce oxidative DNA damage | Clinical trials |
| DNA repair enhancers | Boost WRN activity | Preclinical |
| Gene therapy | Restore WRN expression | Research |
| Telomerase activation | Address telomere attrition | Research |

Animal Models

• Wrn knockout mice: Mild premature aging phenotype
• Wrn helicase-deficient mice: More severe phenotype
• Neuron-specific knockout: Neurodegeneration phenotype

See Also

• [RECQL1 Gene](/proteins/recql1-protein)
• [RECQL3 Gene](/proteins/recql3-protein)
• [RECQL4 Gene](/proteins/recql4-protein)
• [DNA Damage Response Pathway](/mechanisms/dna-damage-response)
• [Oxidative Stress Pathway](/mechanisms/oxidative-stress-pathway)
• [Telomere Maintenance Pathway](/mechanisms/telomere-maintenance)

External Links

• [NCBI Gene: WRN](https://www.ncbi.nlm.nih.gov/gene/7496)
• [UniProt: WRN](https://www.uniprot.org/uniprot/Q9H2L9)
• [WRN Database - Osaka University](https://werner.osc.go.jp/)
• [PubMed Search: WRN neurodegeneration](https://pubmed.ncbi.nlm.nih.gov/?term=WRN+neurodegeneration)

Background

The study of Wrn — Werner Syndrome Recq Like Helicase 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

^[1] Oshima J, et al. Nat Rev Cancer. 2017;17(4):262-275. PMID: 28272588(https://pubmed.ncbi.nlm.nih.gov/28272588/)

^[2] Croteau DL, et al. Nat Rev Mol Cell Biol. 2014;15(11):717-728. PMID: 25303019(https://pubmed.ncbi.nlm.nih.gov/25303019/)

^[3] Bohr VA. J Mol Med (Berl). 2005;83(10):795-802. PMID: 16001326(https://pubmed.ncbi.nlm.nih.gov/16001326/)

^[4] Lebel M, et al. Trends Neurosci. 2006;29(10):587-595. PMID: 16890452(https://pubmed.ncbi.nlm.nih.gov/16890452/)

^[5] Katyal S, et al. Nat Rev Neurol. 2014;10(12):687-694. PMID: 25366156(https://pubmed.ncbi.nlm.nih.gov/25366156/)

Pathway Diagram

The following diagram shows the key molecular relationships involving WRN — Werner Syndrome RecQ Like Helicase discovered through SciDEX knowledge graph analysis: