M2I-1 a small Mad2 inhibitor-1. the first small molecule inhibitor targeting the binding of Mad2 to Cdc20, an essential proteinprotein interaction (PPI) within the SAC. It can disturbs conformational dynamics of Mad2 critical for complex formation with Cdc20. It can also inhibited the Mad2-F-Mbp1 interaction in FP assays.
[1]. Johanna Kastl et al. Mad2 Inhibitor-1 (M2I-1): A Small Molecule Protein-Protein Interaction Inhibitor Targeting the Mitotic Spindle Assembly Checkpoint. ACS Chem. Biol., 2015, 10 (7), pp 1661-1666.