Structural factors contributing to the Abl/Lyn dual inhibitory activity of 3-substituted benzamide derivatives

To investigate why 3-substituted benzamide derivatives show dual inhibition of Abl and Lyn protein tyrosine kinases, we determined their inhibitory activities against Abl and Lyn, carried out molecular modeling, and conducted a structure–activity relationship study with the aid of a newly determined X-ray structure of the Abl/Lyn dual inhibitor INNO-406 (formerly known as NS-187) bound to human Abl. We found that this series of compounds interacted with both kinases in very similar ways, so that they can inhibit both kinases effectively.

Graphical abstractInhibition and structural studies show that dual inhibition of Abl and Lyn kinases by 3-substituted benzamides can be explained by a high similarity in their modes of interaction with both kinases.Figure optionsDownload full-size imageDownload as PowerPoint slide