The fungal plasma membrane H⁺‐ATPase (Pma1p) is a potential target for the discovery of new antifungal agents. Surprisingly, no structure–activity relationship studies for small molecules targeting Pma1p have been reported. Herein, we disclose a LEGO‐inspired fragment assembly strategy for the design, synthesis, and discovery of benzo[d]thiazoles containing a 3,4‐dihydroxyphenyl moiety as potential Pma1p inhibitors. A series of 2‐(benzo[d]thiazol‐2‐ylthio)‐1‐(3,4‐dihydroxyphenyl)ethanones was found to inhibit Pma1p, with the most potent IC₅₀ value of 8 μm in an in vitro plasma membrane H⁺‐ATPase assay. These compounds were also found to strongly inhibit the action of proton pumping when Pma1p was reconstituted into liposomes. 1‐(3,4‐Dihydroxyphenyl)‐2‐((6‐(trifluoromethyl)benzo[d]thiazol‐2‐yl)thio)ethan‐1‐one (compound 38) showed inhibitory activities on the growth of Candida albicans and Saccharomyces cerevisiae, which could be correlated and substantiated with the ability to inhibit Pma1p in vitro.

中文翻译：

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乐高启发的药物设计：揭示一类含有3,4-二羟苯基部分的苯并[d]噻唑类作为血浆膜H + -ATPase抑制剂

真菌质膜H ⁺ -ATPase（Pma1p）是发现新的抗真菌剂的潜在目标。令人惊讶的是，没有针对靶向Pma1p的小分子的结构-活性关系研究的报道。本文中，我们公开了一种乐高启发性的片段组装策略，用于设计，合成和发现含有3,4-二羟基苯基部分作为潜在Pma1p抑制剂的苯并[ d ]噻唑。发现一系列2-（苯并[ d ]噻唑-2-基硫基）-1-（3,4-二羟基苯基）乙酮可抑制Pma1p，在体外质膜中最有效的IC ₅₀值为8μm高⁺‐ATPase分析。当Pma1p重构为脂质体时，还发现这些化合物强烈抑制质子泵浦的作用。1-（3,4-二羟基苯基）-2-（（6-（三氟甲基）苯并[ d ]噻唑-2-基）硫基）乙酮-1（化合物38）对白色念珠菌和酿酒酵母（Saccharomyces cerevisiae），可以与体外抑制Pma1p的能力相关并得到证实。