Ku80 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Protein Overview | |
|---|---|
| Protein Name | Ku80 |
| Gene | XRCC5 |
| UniProt ID | P13010 |
| PDB Structure | 1JEY, 1JEQ, 2QHR |
| Molecular Weight | ~83 kDa |
| Subcellular Localization | Nucleus (chromatin-bound) |
| Protein Family | Ku family |
The Ku80 protein (also known as XRCC5) is a subunit of the Ku heterodimer that functions in non-homologous end joining (NHEJ) DNA repair. Ku80 is crucial for maintaining genomic stability in neurons and other cell types. Deficiencies in Ku80 function have been associated with neurodegeneration and premature aging.
Ku80 protein forms a heterodimer with Ku70 to create the Ku autoantigen complex. Key structural features include:
The Ku dimer has a ring-like structure that can slide onto DNA ends, encircling the DNA helix.
Ku80 is essential for DNA repair through the non-homologous end joining (NHEJ) pathway:
In neurons, Ku80 is particularly important for:
| Approach | Status | Notes |
|---|---|---|
| Small molecule NHEJ enhancers | Research | Enhance Ku80 function |
| Gene therapy | Preclinical | AAV-Ku80 delivery |
| Antioxidants | Clinical | Reduce oxidative DNA damage |
| DNA-PK inhibitors | Research | In cancer, not neurodegeneration |
This gene/protein is expressed in various brain regions with specific patterns relevant to neurodegenerative diseases.
Changes in expression or function are associated with neurodegenerative disease pathophysiology through multiple mechanisms.
Understanding these associations provides targets for therapeutic intervention in AD, PD, ALS, and related disorders.
Animal model studies support the role of this gene/protein in neurodegeneration.
The study of Ku80 Protein 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 and neuronal DNA repair." Aging Cell. PMID:22221689.
Sykora P, et al. (2017). "DNA repair deficits in AD." JAD. PMID:28671194.
Imam SZ, et al. (2006). "Ku80 in neurodegeneration." J Neurosci. PMID:16775134.
Weissman L, et al. (2007). "DNA repair and aging." Mech Ageing Dev. PMID:17433382.
McGhee KA, et al. (2015). "XRCC5 variants." Neurobiol Aging. PMID:25697624.