A cell-permeable pyridinylvinyl-quinazolinone compound that is shown to specifically inhibit human RAD51 (IC50=27.4uM). Does not affect RecA even at much higher concentration (~250uM). Directly interacts with RAD51 (=5.6uM), and disrupts its binding to DNA and nucleoprotein filament formation. Blocks double-strand break-induced homologous recombination and enhances sensitivity of cells to Cisplatin and Mitomycin C. Diminishes co-aggregate formation between RAD51-ssDNA filament and dsDNA. RAD51-Stimulatory Compound-1, RS-1 is also available.Formula:C22H17N3OMolecular Weight:339.4Solubility:DMSO (50mg/ml)Storage and Stability:Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile buffer or dH2O. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Reconstituted product is stable for 6 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
