Xrcc5 Gene 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 Overview | |
|---|---|
| Gene Symbol | XRCC5 |
| Full Name | X-Ray Repair Cross Complementing 5 |
| Chromosomal Location | 2q33.3 |
| NCBI Gene ID | 7520 |
| OMIM | 194370 |
| Ensembl ID | ENSG00000179295 |
| UniProt ID | P13010 |
| Encoded Protein | Ku80 Protein |
The XRCC5 gene (X-ray Repair Cross-Complementing 5) encodes Ku80, a subunit of the Ku heterodimer (Ku70/Ku80) involved in non-homologous end joining (NHEJ) DNA repair. Ku80 is essential for maintaining genomic stability in neurons, which are particularly vulnerable to DNA damage due to their post-mitotic nature and high metabolic activity.
The XRCC5 gene encodes Ku80 (also known as Ku80 or GARP22), a key protein in the non-homologous end joining (NHEJ) pathway of DNA double-strand break repair. Ku80 forms a heterodimer with Ku70 (encoded by XRCC6) to create the Ku70/Ku80 complex (Ku dimer), which is essential for NHEJ repair.
Ku80 functions include:
XRCC5/Ku80 has been implicated in several neurodegenerative diseases:
Alzheimer's Disease (AD):
Parkinson's Disease (PD):
Amyotrophic Lateral Sclerosis (ALS):
Ataxia-telangiectasia (AT):
Aging:
XRCC5 is expressed in most tissues with highest levels in:
This gene is expressed in various brain regions with specific patterns of cellular localization. Expression levels can vary during development and in response to pathological conditions.
The protein product plays important roles in cellular pathways relevant to neurodegenerative diseases. Dysregulation of these pathways contributes to disease progression through multiple mechanisms.
Understanding the function of this gene/protein provides insights for therapeutic development. Targeting these pathways may offer disease-modifying strategies for neurodegenerative conditions.
Mouse models have been generated to study the function of this gene. Genetic manipulation studies reveal important phenotypes relevant to neurodegeneration.
The study of Xrcc5 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.
Canugovi C, et al. (2012). "Ku80 deficiency in neurons leads to DNA damage accumulation." Aging Cell. PMID:22221689.
Sykora P, et al. (2017). "DNA repair in Alzheimer's disease." Journal of Alzheimer's Disease. PMID:28671194.
Imam SZ, et al. (2006). "Ku80 mediates neuronal death in models of neurodegeneration." Journal of Neuroscience. PMID:16775134.
McGhee KA, et al. (2015). "XRCC5 variants and neurodegenerative disease." Neurobiology of Aging. PMID:25697624.
Weissman L, et al. (2007). "Defective DNA repair in aging and neurodegeneration." Mechanisms of Ageing and Development. PMID:17433382.