STO-609 is a specific inhibitor of the Ca2+/Calmodulin-dependent protein kinase kinase(CaM-KK) that inhibits the activities of recombinant CaM-KK and CaM-KK isoforms, with Ki values of 80 and 15 ng/ml, respectively, and also inhibits their autophosphorylation activities.
STO-609 inhibits the activities of recombinant CaM-KK and CaM-KK isoforms, with Ki values of 80 and 15 ng/ml, respectively, and also inhibits their autophosphorylation activities. STO-609 is highly selective for CaM-KK without any significant effect on the downstream CaM kinases (CaM-KI and -IV). In transfected HeLa cells, STO-609 suppresses the Ca2+-induced activation of CaM-KIV in a dose-dependent manner. STO-609 can permeate cells and is a competitive inhibitor of ATP.
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