Article
作者: Pham, Helen T ; Mao, Xiaohong ; Michaud, Gregory A ; Tallarico, John A ; Jain, Rishi K ; Liu, Guoxun ; Hornak, Viktor ; Yu, Gary ; Patel, Sejal J ; Sivick, Kelsey E ; McKenna, Jeffery M ; Zheng, Lianxing ; Broom, Wendy ; Wang, Yuan ; Wu, Hua ; Miller, Howard R ; Brittain, Scott M ; Henault, Martin ; Cho, Charles Y ; Nicholson, Thomas B ; Feng, Yan ; Ross, Nathan T ; Schirle, Markus ; Li, Jie ; Chen, Lihao ; Zhang, Xuewu ; Digan, Mary Ellen ; Bai, Xiao-Chen ; Tutter, Antonin ; McWhirter, Sarah M ; Chen, Yu ; Chen, Christine H ; Tria, George S ; Canham, Stephen M ; Jenkins, Jeremy L
AbstractStimulator of interferon genes (STING) is a dimeric transmembrane adapter protein that plays a key role in the human innate immune response to infection and has been therapeutically exploited for its antitumor activity. The activation of STING requires its high-order oligomerization, which could be induced by binding of the endogenous ligand, cGAMP, to the cytosolic ligand-binding domain. Here we report the discovery through functional screens of a class of compounds, named NVS-STGs, that activate human STING. Our cryo-EM structures show that NVS-STG2 induces the high-order oligomerization of human STING by binding to a pocket between the transmembrane domains of the neighboring STING dimers, effectively acting as a molecular glue. Our functional assays showed that NVS-STG2 could elicit potent STING-mediated immune responses in cells and antitumor activities in animal models.