Mps1/TTK-IN-1

Mps1/TTK-IN-1 (Compound cpd-5), a derivative of NMS-P715 , is a Mps1 kinase inhibitor with an IC50 of 9.2 nM and a Kd of 1.6 nM. Mps1/TTK-IN-1 specifically targets the ATP-binding pocket of the Mps1 kinase. Mps1/TTK-IN-1 maintains inhibitory activity against Mps1 drug-resistant mutants (C604Y, C604W) with IC50 values of 170 and 19 nM and Kd values of 471 and 349 nM. Mps1/TTK-IN-1 can block the phosphorylation of kinetochore protein KNL1 mediated by Mps1, interfere with the spindle assembly checkpoint function, prevent the correct separation of chromosomes, and thereby inhibit the mitosis and proliferation of tumor cells[1].