Structure-Based Development of a Protein–Protein Interaction Inhibitor Targeting Tumor Necrosis Factor Receptor-Associated Factor 6
作者:Jun Moriya、Koh Takeuchi、Kenji Tai、Kenzo Arai、Naoki Kobayashi、Naoki Yoneda、Yoshifumi Fukunishi、Atsushi Inoue、Miho Kihara、Takumi Murakami、Kenichi Chiba、Ichio Shimada
DOI:10.1021/acs.jmedchem.5b00778
日期:2015.7.23
The interactions between tumor necrosis factor (TNF) receptor-associated factor 6 (TRAF6) and TNF superfamily receptors (TNFRSFs) are promising targets for rheumatoid arthritis (RA) treatment. However, due to the challenging nature of protein-protein interactions (PPIs), a potent inhibitor that surpasses the affinity of the TRAF6-TNFRSF interactions has not been developed. We developed a small-molecule PPI inhibitor of TRAF6-TNFRSF interactions using NMR and in silico techniques. The most potent compound, TRI4, exhibited an affinity higher than those of TNFRSFs and competitively inhibited a TRAF6-TNFRSF interaction. Structural characterization of the TRAF6-TRI4 complex revealed that TRI4 supplants key interactions in the TRAF6-TNFRSF interfaces. In addition, some TRAF6-TRI4 interactions extend beyond the TRAF6-TNFRSF interfaces and increase the binding affinity. Our successful development of TRI4 provides a new Opportunity for RA treatment and implications fur structure-guided development of PPI inhibitors.