Staphylococcus aureus is one of the most frequent causes of nosocomial and community-acquired infections, with drug-resistant strains being responsible for tens of thousands of deaths per year. S. aureus sortase A inhibitors are designed to interfere with virulence determinants. We have identified disulfanylbenzamides as a new class of potent inhibitors against sortase A that act by covalent modification of the active-site cysteine. A broad series of derivatives were synthesized to derive structure-activity relationships (SAR). In vitro and in silico methods allowed the experimentally observed binding affinities and selectivities to be rationalized. The most active compounds were found to have single-digit micromolar Ki values and caused up to a 66 % reduction of S. aureus fibrinogen attachment at an effective inhibitor concentration of 10 μM. This new molecule class exhibited minimal cytotoxicity, low bacterial growth inhibition and impaired sortase-mediated adherence of S. aureus cells.

中文翻译：

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不对称二硫烷基苯甲酰胺作为金黄色葡萄球菌分选酶 A 的不可逆选择性抑制剂。

金黄色葡萄球菌是医院和社区获得性感染的最常见原因之一，耐药菌株每年导致数万人死亡。金黄色葡萄球菌分选酶 A 抑制剂旨在干扰毒力决定因素。我们已经确定二硫烷基苯甲酰胺是一类新型有效的分选酶 A 抑制剂，通过活性位点半胱氨酸的共价修饰发挥作用。合成了一系列广泛的衍生物来推导构效关系（SAR）。体外和计算机方法使实验观察到的结合亲和力和选择性合理化。研究发现，最活跃的化合物具有个位数的微摩尔 Ki 值，在 10 μM 的有效抑制剂浓度下，金黄色葡萄球菌纤维蛋白原附着量减少高达 66%。这种新分子类别表现出最小的细胞毒性、较低的细菌生长抑制和分选酶介导的金黄色葡萄球菌细胞粘附受损。