含有新型烯酸衍生物的碳酸分子作为原烯酸第九氧化酶抑制剂
Yangwen Yan1, Wang Geng1, Chao Chen1
1State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Guiyang 550025, China.
一种新型的pyrazole衍生物,化合物A20,有效地抑制原形氨基氧化酶 (PPO),并表现出强大的除草活性,对作物损害最小,提供一个有前途的环保除草剂候选者.
科学领域:
- 农业化学
- 植物生物化学
- 有机合成
背景情况:
- 甲基氧化酶 (PPO) 是植物叶绿素生物合成中的关键酶.
- 对于开发环境安全的除草剂而言,PPO是关键目标.
- 现有的除草剂,如pyraflufen-ethyl和fluazolate是针对PPO的.
研究的目的:
- 合成新型的pyrazole衍生物与碳酸部分作为潜在的PPO抑制剂.
- 评估合成化合物的除草剂活性和作物安全性.
- 研究强效化合物与PPO的分子相互作用.
主要方法:
- 基于主动拼接和结构简化的醇衍生物的合成.
- 在体外生物测试以确定对*Nicotiana tabacum* PPO (NtPPO) 的抑制作用.
- 对各种杂草的除草活性选和作物安全性评估.
- 分子对接和密度函数理论 (DFT) 的计算.
主要成果:
- 大多数合成的化合物表现出良好的NtPPO抑制和除草剂活性.
- 与标准相比,A20化合物表现出较高的NtPPO抑制 (Ki = 15. 2nM).
- 化合物A20在9.375g/ha的剂量中显示出90%以上的除草活性.
- 化合物A20对作物 (小麦,大米,玉米,大豆,花生,棉花) 的损害明显低于乙烯和酸.
- 分子对接显示了A20与NtPPO的Arg98残留的较强结.
结论:
- 化合物A20是一种强大的PPO抑制剂,具有显著的除草剂效果和提高作物选择性.
- A20的结构特征有助于其增强的结合亲和力和除草剂活性.
- 化合物A20是开发新型环保除草剂的主要化合物.
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