KN-62

Kinase assay

Total kinase activity of CaMKII, determined in a standard 2 min assay (100 μL), contained 35 mM HEPES, 10 mM MgCl2, 1 mM CaCl2, 10 μg of chicken gizzard myosin 20-kD light chain, 0.1 μM calmodulin and 10 μM [γ-33]ATP at 30 °C. The kinase reaction was halted by adding 1 mL of 10% trichloroacetic acid.

Cell lines

K562 cells

Preparation method

The solubility of this compound in DMSO is > 36.1 mg/mL. General tips for obtaining a higher concentration: Please warm the tube at 37 °C for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below - 20 °C for several months.

Reacting condition

1, 2, 5 or 10 μM; 24 or 48 hrs

Applications

KN-62 inhibited the cell growth of K562 cells in a dose-dependent manner. Two days after the treatment of 10 μM KN-62, 63% K562 cells were inhibited. Flow cytometric analysis showed that KN-62 (10 μM, 24 hrs) caused an accumulation of K562 cells in S phase. Immunoblotting studies indicated that CaMKII was inhibited in these K562 cells.

References:

[1]. Tokumitsu H, Chijiwa T, Hagiwara M, Mizutani A, Terasawa M, Hidaka H. KN-62, 1-[N,O-bis(5-isoquinolinesulfonyl)-N-methyl-L-tyrosyl]-4-phenylpiperazi ne, a specific inhibitor of Ca2+/calmodulin-dependent protein kinase II. J Biol Chem. 1990 Mar 15;265(8):4315-20.

[2]. Minami H, Inoue S, Hidaka H. The effect of KN-62, Ca2+/calmodulin dependent protein kinase II inhibitor on cell cycle. Biochem Biophys Res Commun. 1994 Feb 28;199(1):241-8.