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Pepper Mild Mottle Virus Coat Protein as a Novel Target to Screen Antiviral Drugs.

Pepper mild mottle virus (PMMoV) has caused serious economic losses to crop production in many countries. The coat protein (CP) of PMMoV is a multifunctional protein proved to be a determining factor in the assignment of virulence type. Therefore, we studied the interaction between drugs and PMMoV CP as a method to screen anti-PMMoV agents. In this study, vanisulfane (6f) exhibited good inactivation activity (68.5%) by biological activity screening. Meanwhile, the green fluorescent protein and PMMoV CP expression changes of vanisulfane against PMMoV were verified by western blot and qRT-PCR experiments. The affinity between vanisulfane and PMMoV CP was predicted to be the best by autodocking and molecular dynamics simulation. PMMoV CP was purified for the first time from the soluble fraction, and the strong affinity between vanisulfane and CP was further verified by interaction experiments. Therefore, this study found that vanisulfane is a potential anti-PMMoV drug targeting PMMoV CP.