Thonningianin A disrupts pA104R-DNA binding and inhibits African swine fever virus replication

文献类型： 外文期刊

第一作者： Li, Quan-jie

作者： Li, Quan-jie;Shao, Hui-han;Liu, Qian;Huo, Chen-chao;Yi, Dong-rong;Cen, Shan;Zheng, Lin-lin;Feng, Tao;Cen, Shan

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关键词： pA104R; thonningianin A; DNA-binding protein; ASFV; EMSA; structure-based virtual screening

期刊名称：EMERGING MICROBES & INFECTIONS （ 影响因子：7.5； 五年影响因子：7.2 ）

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年卷期： 2025 年 14 卷 1 期

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收录情况： SCI

摘要： African swine fever is a highly lethal disease caused by the African swine fever virus (ASFV), posing a significant threat to the global pig industry, wherease no approved treatments are currently available. The ASFV DNA-binding protein, pA104R, plays a critical role in viral genome packaging and replication, making it a key target for drug discovery. Through structure-based virtual screening, we identified a polyphenolic compound, thonningianin A, which disrupts the pA104R-DNA binding and significantly inhibits ASFV replication. Mechanistic study revealed that thonningianin A binds to the DNA-binding region of pA104R, forming strong hydrogen bonds with H100 and occupying the vital DNA-binding residues K92, R94, and K97. In addition, we resolved the high-resolution (1.8 & Aring;) structure of pA104R (PDB ID 9JS5), providing valuable insights for future drug screening. Together, these results demonstrate that thonningianin A holds great potential for the development of anti-ASFV drug, as a herb extract with favourable pharmacokinetic properties and safety.

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