RSK Inhibitor II

The racemic mixture of a cell-permeable dihydropteridinone that acts as a potent and selective RSK inhibitor (IC₅₀ ≤31 nM against RSK1, 2, 3, and 4; [ATP] = 100 µM) by targeting RSK N-terminal kinase domain in an ATP-competitive manner, while inhibiting 11 other kinases only at higher concentrations (IC₅₀ ≥100 nM) and displaying little activity against 39 others. Shown to selectively inhibit RSK-dependent, but not RSK-independent, cellular protein phosphorylations in PMA-stimulated HEK-293 cells and EGF-stimulated Rat-2 cells (IC₅₀ ~1 µM).

The racemic mixture of a cell-permeable dihydropteridinone that acts as a potent and selective RSK inhibitor (IC₅₀ = 31, 24, 18, and 15 nM against RSK1, 2, 3, and 4, respectively; [ATP] = 100 µM) by targeting RSK N-terminal kinase domain in an ATP-competitive manner, while inhibiting 11 other kinases only at higher concentrations (IC₅₀ ≥100 nM) and displaying little activity against 39 others. Shown to selectively inhibit RSK-dependent, but not RSK-independent, cellular protein phosphorylations in PMA-stimulated human HEK-293 cells and EGF-stimulated rat Rat-2 cells (IC₅₀ ~1 µM). A useful pharmacological reagent for studying RSK-mediated cellular signaling events.

Packaged under inert gas

Toxicity: Standard Handling (A)

Carriere, A., et al. 2008. Curr. Biol.18, 1269
Sapkota, G.P., et al. 2007. Biochem. J.401, 29.
Zaru, R., et al. 2007. Nat. Immunol.8, 1227.

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