A cell-permeable, pyrimidine derivative that acts as an ATP-competitive CDK Inhibitor (Ki=2.5uM for CDK1, and Ki=1.3uM for CDK2), and demonstrates cytostatic properties among a panel of 57 cancer cell lines. Also inhibits ATR kinase (IC50=6.7uM in MCF7 cells), but does not interfere with irradiation-induced autophosphorylation of DNA-PK or ATM. Potentiates a range of DNA-damaging cytotoxic drugs such as hydroxyurea (1.8-fold) and cisplatin (1.4-fold) at 10uM, but not the anti-mitotic paclitaxel. Attenuates G2/M arrest following DNA damage and inhibits RAD51 focus formation. Shown to be synthetically lethal when DNA single-strand break repair is impaired in PARP-inhibited cells.
Formula:C₁₁H₁₇N₅O₂
Molecular Weight:251.28
Solubility:DMSO (10mg/ml, clear, blue solution)
Storage and Stability:Lyophilized powder may be stored at -20°C. Stable for 12 months at -20°C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store 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.
