fumonisin caused by Fusarium verticillioides pose a serious threat to food security. To find more highly active fungicidal and antitoxic candidates with structure diversity based on naturally occurring lead xanthatin, a series of novel spiropiperidinyl-α-methylene-γ-butyrolactones were rationally designed and synthesized. The in vitro bioassay results indicated that compound 7c showed broad-spectrum
由轮枝镰刀菌引起的玉米穗腐病和伏马菌素对粮食安全构成严重威胁。为了基于天然存在的
铅黄黄素寻找更多具有结构多样性的高活性杀菌和抗毒候选物,合理设计并合成了一系列新型螺
哌啶基-α-亚甲基-
γ-丁内酯。体外
生物测定结果表明,化合物7c对立枯丝核菌和立格孢菌具有广谱体外活性,
EC 50值从3.51降至24.10 μg/mL,比阳性对照黄黄素和oxathiapiprolin活性更高。此外,化合物7c对伏马菌素也表现出良好的抗毒功效,即使在20 μg/mL的浓度下抑制率也达到48%。荧光猝灭和分子对接验证了7c和 oxathiapiprolin 均靶向 FvoshC。 RNA测序分析发现FUM
基因簇和内质网蛋白质加工下调。我们的研究发现螺
哌啶基-α-亚甲基-
γ-丁内酯是一种新型的基于 FvoshC 靶点的支架,用于具有抗毒素活性的杀菌剂
铅。