Design, Synthesis, and Biological Activity of Novel Laccase Inhibitors as Fungicides against Rice Blast
作者:Tengda Sun、Xiaoyu Jin、Xiaoming Zhang、Xingxing Lu、Changkai Wang、Jialin Cui、Huan Xu、Xinling Yang、Xili Liu、Li Zhang、Yun Ling
DOI:10.1021/acs.jafc.2c05144
日期:2022.11.16
Laccase is a potential target for novel agricultural fungicide discovery. PMDD-5Y was the first agent reported with high activity against laccase to control phytopathogenic fungi. Thirty-two novel agents containing cinnamaldehyde thiosemicarbazide were synthesized with PMDD-5Y as the lead compound, with most of the target compounds exhibiting excellent activity in vitro. Compound a2 (EC50 = 9.71 μg/mL)
漆酶是发现新型农业杀菌剂的潜在目标。PMDD-5Y是第一个报道的对漆酶具有高活性以控制植物病原真菌的试剂。以PMDD-5Y为先导化合物,合成了32种含肉桂醛氨基硫脲的新型药物,大多数目标化合物在体外表现出优异的活性。化合物a2 (EC 50 = 9.71 μg/mL)比商业杀菌剂异丙硫醇 (EC 50 = 18.62 μg/ mL) 表现出更强的抗稻瘟病菌效力。a2对水稻稻瘟病菌的疗效和保护作用均优于PMDD-5Y. 扫描电镜表明a2可引起菌丝体生长萎缩和畸形。此外,a2 (IC 50 = 0.18 mmol/L) 对漆酶的活性高于PMDD-5Y (IC 50 = 0.33 mmol/L) 和半胱氨酸 (IC 50 = 0.30 mmol/L)。分子对接分析揭示了这些化合物与漆酶之间相互作用的性质。本研究确定了一种新型漆酶抑制剂a2作为候选杀菌剂,用于控制农业中的稻瘟病。