Targeting cancer-related Hsp70-Bim protein-protein interactions (PPIs) offers a new strategy for the design of Hsp70 inhibitors. Herein, we discovered a novel Hsp70 inhibitor, S1g-6, based on the established BH3 mimetics. S1g-6 exhibited sub-μM binding affinity toward Hsp70 and selectively disrupted Hsp70-Bim PPI. The target specificity of S1g-6 in situ was validated by affinity-based protein profiling
Exploiting the “Hot-Spots” of Hsp70<b>–</b>Bim Protein<b>–</b>Protein Interaction to Optimize the 1-Oxo-1<i>H</i>-phenalene-2,3-dicarbonitrile Analogues as Specific Hsp70<b>–</b>Bim Inhibitors