Abstract：
The unsatisfactory effects of conventional bactericides and antimicrobial resistance have increased the challenges in managing plant diseases caused by bacterial pests. Here, we report the successful design and synthesis of benzofuran derivatives using benzofuran as the core skeleton and splicing the disulfide moieties commonly seen in natural substances with antibacterial properties. Most of our developed benzofurans displayed remarkable antibacterial activities to frequently encountered pathogens, including Xanthomonas oryzae pv oryzae (Xoo), Xanthomonas oryzae pv oryzicola (Xoc), and Xanthomonas axonopodis pv citri (Xac). With the assistance of the three-dimensional quantitative constitutive relationship (3D-QSAR) model, the optimal compound V40 was obtained, which has better in vitro antibacterial activity with EC50 values of 0.28, 0.56, and 10.43 μg/mL against Xoo, Xoc, and Xac, respectively, than those of positive control, TC (66.41, 78.49, and 120.36 μg/mL) and allicin (8.40, 28.22, and 88.04 μg/mL). Combining the results of proteomic analysis and enzyme activity assay allows the antibacterial mechanism of V40 to be preliminarily revealed, suggesting its potential as a versatile bactericide in combating bacterial pests in the future.
摘要：
常规杀菌剂的不令人满意的效果和抗微生物剂抗性增加了管理由细菌害虫引起的植物病害的挑战。这里,我们报道了以苯并呋喃为核心骨架，并拼接天然物质中常见的具有抗菌性能的二硫化物部分，成功地设计和合成了苯并呋喃衍生物。我们开发的大多数苯并呋喃对经常遇到的病原体显示出显着的抗菌活性，包括米黄单胞菌(Xoo)，米黄单胞菌(Xoc)，和黄单胞菌轴突pvcitri（Xac）。借助三维定量本构关系(3D-QSAR)模型,得到最优化合物V40，具有更好的体外抗菌活性，对Xoo的EC50值为0.28、0.56和10.43μg/mL，Xoc,还有Xac,分别,比那些阳性对照，TC(66.41、78.49和120.36μg/mL)和大蒜素(8.40、28.22和88.04μg/mL)。结合蛋白质组学分析和酶活性测定的结果，可以初步揭示V40的抗菌机制，这表明了它在未来对抗细菌害虫方面作为一种多功能杀菌剂的潜力。
