Rad50 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.
| RAD50 Gene |
|---|
| Gene Symbol | RAD50 |
| Full Name | DNA Repair Protein RAD50 |
| Chromosomal Location | 5q23.2 |
| NCBI Gene ID | 10111 |
| OMIM | 604040 |
| Ensembl ID | ENSG00000113522 |
| UniProt ID | Q9XQB3 |
| Associated Diseases | Nijmegen Breakage Syndrome-Like Disorder, Cancer Predisposition |
The RAD50 gene encodes the RAD50 protein, a crucial component of the MRN complex (MRE11-RAD50-NBS1) that plays a central role in the recognition and repair of DNA double-strand breaks. This protein functions as a molecular scaffold and is essential for genomic stability.
RAD50 is a structural maintenance of chromosomes (SMC) family protein that plays a critical role in DNA double-strand break repair.
- Coiled-Coil Domains: Long alpha-helical regions that mediate protein interactions
- Walker A and B Motifs: ATP-binding domains essential for function
- Zinc Hook: Dimeric interface that bridges DNA ends
- ATPase Activity: Regulates complex assembly and disassembly
- DNA End Bridging: Brings together distant DNA ends
- MRN Complex: Central scaffolding component with MRE11 and NBS1
- DNA Damage Signaling: Facilitates ATM activation
- End Processing: Works with MRE11 for end resection
- Homologous Recombination: Essential for proper HR execution
- Cell Cycle Checkpoints: Mediates G1/S and G2/M transitions
- Telomere Maintenance: Critical for telomere length and integrity
- Meiosis: Essential for meiotic recombination
- Genomic Stability: Prevents chromosomal aberrations
Rare autosomal recessive disorder with features overlapping with Nijmegen Breakage Syndrome:
Clinical Features:
- Microcephaly
- Growth retardation
- Dysmorphic features
- Immunodeficiency
- Cancer predisposition
- Radiation sensitivity
Note: Phenotypically milder than classical NBS
- Increased risk of lymphoid malignancies
- Solid tumors including breast cancer
- Constitutional mismatch repair deficiency syndrome (Lynch syndrome)
- Expressed in neuronal and glial cells
- High expression in developing brain
- Maintained in adult neural tissue
- Essential for neural progenitor proliferation
- Cell cycle regulated
- DNA damage induces expression
- Post-translational modifications control activity
- Hopfner KP, et al. (2002). "The Rad50 zinc-hook is a structural dimer that bridges DNA." Cell. PMID:12464178
- de Jager M, et al. (2001). "Human Rad50/Mre11 is a versatile signal transducer." Mol Cell Biol. PMID:11479301
- Wiltfang J, et al. (2010). "The RAD50 protein: functions and implications." DNA Repair. PMID:20933471
The study of Rad50 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.