RAD51–BRCA2 protein–protein interaction (None standardized)

The RAD51–BRCA2 protein–protein interaction is fundamental for the repair of DNA double-strand breaks by homologous recombination. BRCA2 mediates the recruitment and assembly of RAD51 nucleoprotein filaments at DNA damage sites, primarily through conserved BRC repeats and additional binding motifs. This interaction is pivotal for accurate DNA repair, maintenance of genomic integrity, and protection of replication forks. Disruption of this interaction—by genetic mutation or pharmaceutical inhibitors—impairs DNA repair, sensitizes cells to DNA-damaging agents, and is an exploitable vulnerability in BRCA2-deficient cancers. Efforts to develop small-molecule inhibitors are ongoing, aiming to induce synthetic lethality in tumors while balancing risks in normal tissue repair.

Other names

RAD51–BRCA2 interactionRAD51:BRC Repeat interactionRAD51:BRC4 interactionBRCA2–RAD51 complex

Inhibitors typically disrupt the binding of BRC repeats (on BRCA2) to RAD51, preventing RAD51 localization and filament formation at DNA damage sites. This impairs homologous recombination repair, leading to increased genomic instability and sensitizing cancer cells to DNA-damaging agents.