Tailoring Natural Abenquines To Inhibit the Photosynthetic Electron Transport through Interaction with the D1 Protein in Photosystem II
作者:Amalyn Nain-Perez、Luiz C. A. Barbosa、Celia R. A. Maltha、Samuele Giberti、Giuseppe Forlani
DOI:10.1021/acs.jafc.7b04624
日期:2017.12.27
their activity as Hill inhibitors, under basal, uncoupled, or phosphorylating conditions, or excluding photosystem I. Four analogues showed high effectiveness (IC50 = 0.1–0.4 μM), comparable with the commercial herbicide diuron (IC50 = 0.3 μM). The data suggest that this class of compounds interfere at the reducing side of photosystem II, having protein D1 as the most probable target. Molecular docking
苯甲酰胺是天然N带有氨基酸残基的-乙酰氨基苯醌,它们是光合作用电子传输链的弱抑制剂。为了将阿苯醌支架用作合成针对光合作用的新除草剂的模型,通过用苄胺取代氨基酸残基,并用不同的酰基取代乙酰基,制备了14种新的类似物。合成过程分三步完成,从容易获得的2,5-二甲氧基苯胺,酰氯和苄基胺中获得68-95%的总收率。关键步骤包括(i)苯胺的酰化,(ii)氧化和(iii)苄基氨基部分的氧化加成。在碱性,未偶联或磷酸化条件下,或在不包括光系统I的条件下,测定了这些化合物作为Hill抑制剂的活性。四种类似物显示出很高的效力(IC50 = 0.1–0.4μM),可与市售除草剂杜隆(IC 50 = 0.3μM)相媲美。数据表明这类化合物会干扰光系统II的还原,以蛋白质D1为最可能的靶标。与菠菜菠菜质体醌结合位点的分子对接研究进一步加强了该提议。