APS-2-79 is an inhibitor of MAPK signaling dependent on kinase suppressor of Ras (KSR). It inhibits ATP binding to KSR2 in KSR2-MEK1 complexes (IC = 120 nM), stabilizes KSR2 in an inactive state, and reduces interactions between B-RAF and KSR2-MEK1 complexes. APS-2-79 (5 μM) inhibits KSR-stimulated phosphorylation of MEK and ERK in HEK293H cells. It enhances the efficacy of the MEK inhibitor trametinib , further reducing cell viability in HCT116 and A549 cell lines containing K-Ras mutations, but not B-RAF mutant SK-MEL-239 and A375 cell lines, when used at a concentration of 1 μM.
APS-2-79 (hydrochloride) is a KSR-dependent MEK antagonist. APS-2-79 inhibits ATPbiotin binding to KSR2 within the KSR2-MEK1 complexe with an IC50 of 120 nM. APS-2-79 makes the stabilization of the KSR inactive state antagonizes oncogenic Ras-MAPK signaling.
IC50&Target
KSR2 MEK1
120 nM (IC50)
体外研究
APS-2-79 (5 μM) suppresses KSR-stimulated MEK and ERK phosphorylation in 293H cells.
APS-2-79 (1 μM) enhances the efficacy of the clinical MEK inhibitor trametinib within cancer cell lines containing K-Ras mutations.
分子式
C23H21N3O3.HCl
分子量
423.89
CAS号
2002381-31-7
运输条件
Room temperature in continental US; may vary elsewhere.