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Protocol for high-throughput screening of SARS-CoV-2 main protease inhibitors using a robust fluorescence polarization assay

Jing Zhang,Haohao Yan,Gangan Yan,Xiaoping Liu,Yanchang Wang,Yunyu Chen

Summary Discovery of efficacious antiviral agents targeting SARS-CoV-2 main protease (Mpro) is of the highest importance to fight against COVID-19. Here, we describe a simple protocol for high-throughput screening of Mpro inhibitors using a robust fluorescence polarization (FP) assay. Candidate Mpro inhibitors from large compound libraries could be rapidly identified by monitoring the change of millipolarization unit value. This affordable FP assay can be modified to screen antiviral agents targeting virus protease. For complete details on the use and execution of this protocol, please refer to Li et al. (2022) , Yan et al. (2021) , and Yan et al. (2022c) .