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Beschreibung

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 µ,M) 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 µ,M)., 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 µ,M) 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 µ,M). A useful pharmacological reagent for studying RSK-mediated cellular signaling events.