A bivalent inhibitor against TDRD3 to suppress phase separation of methylated G3BP1.

Chemical communications (Cambridge, England) 2024 Jan 16

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The formation of membrane-less organelles is driven by multivalent weak interactions while mediation of such interactions by small molecules remains an unparalleled challenge. Here, we uncovered a bivalent inhibitor that blocked the recruitment of TDRD3 by the two methylated arginines of G3BP1. Relative to the monovalent inhibitor, this bivalent inhibitor demonstrated an enhanced binding affinity to TDRD3 and capability to suppress the phase separation of methylated G3BP1, TDRD3, and RNAs, and in turn inhibit the stress granule growth in cells. Our result paves a new path to mediate multivalent interactions involved in SG assembly for potential combinational chemotherapy by bivalent inhibitors.

Citation

Wei-Wei Fan, Tian Xu, Jia Gao, Han-Yu Zhang, Yan Li, Duo-Duo Hu, Shuaixin Gao, Jia-Hai Zhang, Xing Liu, Dan Liu, Pi-Long Li, Catherine C L Wong, Xue-Biao Yao, Yun-Yu Shi, Zhen-Ye Yang, Xi-Sheng Wang, Ke Ruan. A bivalent inhibitor against TDRD3 to suppress phase separation of methylated G3BP1. Chemical communications (Cambridge, England). 2024 Jan 16;60(6):762-765