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Mapping Protein Targets of Bioactive Small Molecules Using Lipid-Based Chemical Proteomics
ACS Chemical Biology ( IF 3.5 ) Pub Date : 2017-09-20 00:00:00 , DOI: 10.1021/acschembio.7b00581
Kenneth M Lum 1 , Yoshiaki Sato 1 , Brittney A Beyer 2 , Warren C Plaisted 3 , Justin L Anglin 3 , Luke L Lairson 2 , Benjamin F Cravatt 1
Affiliation  

Lipids play critical roles in cell biology, often through direct interactions with proteins. We recently described the use of photoreactive lipid probes combined with quantitative mass spectrometry to globally map lipid–protein interactions, and the effects of drugs on these interactions, in cells. Here, we investigate the broader potential of lipid-based chemical proteomic probes for determining the cellular targets of biologically active small molecules, including natural product derivatives and repurposed drugs of ill-defined mechanisms. We identify the prostaglandin-regulatory enzyme PTGR2 as a target of the antidiabetic hops derivative KDT501 and show that miconazole—an antifungal drug that attenuates disease severity in preclinical models of multiple sclerosis—inhibits SGPL1, an enzyme that degrades the signaling lipid sphingosine-1-phosphate, drug analogues of which are used to treat multiple sclerosis in humans. Our findings highlight the versatility of lipid-based chemical proteomics probes for mapping small molecule–protein interactions in human cells to gain mechanistic understanding of bioactive compounds.

中文翻译:


使用基于脂质的化学蛋白质组学绘制生物活性小分子的蛋白质靶标



脂质通常通过与蛋白质直接相互作用,在细胞生物学中发挥着关键作用。我们最近描述了使用光反应脂质探针结合定量质谱来绘制细胞中脂质-蛋白质相互作用的全局图谱,以及药物对这些相互作用的影响。在这里,我们研究了基于脂质的化学蛋白质组探针在确定生物活性小分子的细胞靶标方面的更广泛潜力,包括天然产物衍生物和机制不明的重新利用药物。我们将前列腺素调节酶 PTGR2 确定为抗糖尿病啤酒花衍生物 KDT501 的靶标,并表明咪康唑(一种在多发性硬化症临床前模型中减轻疾病严重程度的抗真菌药物)可抑制 SGPL1(一种降解信号脂质鞘氨醇-1-的酶)磷酸盐,其药物类似物用于治疗人类多发性硬化症。我们的研究结果强调了基于脂质的化学蛋白质组学探针的多功能性,用于绘制人体细胞中小分子-蛋白质相互作用的图谱,以获得对生物活性化合物的机制理解。
更新日期:2017-09-20
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