Rpa2 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.
:: infobox .infobox-protein
| Protein Name | Replication Protein A2 (RPA2) |
| Gene | RPA2 |
| UniProt | P15927 |
| PDB Structure | 1L1O, 1L2N |
| Molecular Weight | ~32 kDa |
| Subcellular Localization | Nucleus |
| Protein Family | RPA family |
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Replication Protein A2 (RPA2) is the middle subunit of the heterotrimeric Replication Protein A (RPA) complex, essential for DNA replication, repair, and recombination. RPA2 serves as a phosphorylation-regulated scaffold that coordinates DNA damage response signaling with DNA repair processes. Its rapid phosphorylation in response to DNA damage makes it a key marker of DNA damage activation in neurons.
RPA2 is a 270-amino acid protein with three DNA-binding domains (DBDs) and a C-terminal regulatory domain containing multiple phosphorylation sites. The protein interacts with RPA1 and RPA3 to form the functional RPA complex.
RPA2 is a component of the RPA complex that binds to single-stranded DNA during replication and repair. It serves as a platform for recruiting DNA damage response proteins including ATR, ATM, and RAD51.
In neurons, RPA2 phosphorylation is a key response to genotoxic stress. The protein helps coordinate DNA repair with cell cycle checkpoints.
RPA2 phosphorylation may be dysregulated in AD brains. DNA damage accumulation triggers RPA2 phosphorylation, which may be excessive or sustained in neurodegeneration.
DNA damage in dopaminergic neurons may involve RPA2-mediated repair pathways. Impaired RPA2 function could contribute to neuronal death.
No RPA2-targeted therapies exist. Modulating DNA damage response signaling is being explored as a therapeutic strategy.
The study of Rpa2 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.