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具有体内活性的基于硫内酯霉素的细菌β-酮酰基-ACP合酶抑制剂。

Thiolactomycin-Based Inhibitors of Bacterial β-Ketoacyl-ACP Synthases with in Vivo Activity.

作者信息

Bommineni Gopal R, Kapilashrami Kanishk, Cummings Jason E, Lu Yang, Knudson Susan E, Gu Chendi, Walker Stephen G, Slayden Richard A, Tonge Peter J

机构信息

Department of Microbiology, Immunology and Pathology, Colorado State University , Fort Collins, Colorado 80523-2025, United States.

出版信息

J Med Chem. 2016 Jun 9;59(11):5377-90. doi: 10.1021/acs.jmedchem.6b00236. Epub 2016 May 24.

Abstract

β-Ketoacyl-ACP synthases (KAS) are key enzymes involved in the type II bacterial fatty acid biosynthesis (FASII) pathway and are putative targets for antibacterial discovery. Several natural product KAS inhibitors have previously been reported, including thiolactomycin (TLM), which is produced by Nocardia spp. Here we describe the synthesis and characterization of optically pure 5R-thiolactomycin (TLM) analogues that show improved whole cell activity against bacterial strains including methicillin-resistant Staphylococcus aureus (MRSA) and priority pathogens such as Francisella tularensis and Burkholderia pseudomallei. In addition, we identify TLM analogues with in vivo efficacy against MRSA and Klebsiella pneumoniae in animal models of infection.

摘要

β-酮脂酰-ACP合成酶(KAS)是参与II型细菌脂肪酸生物合成(FASII)途径的关键酶,是抗菌药物研发的潜在靶点。此前已报道了几种天然产物KAS抑制剂,包括诺卡氏菌属产生的硫内酯霉素(TLM)。在此,我们描述了光学纯的5R-硫内酯霉素(TLM)类似物的合成与表征,这些类似物对包括耐甲氧西林金黄色葡萄球菌(MRSA)以及诸如土拉弗朗西斯菌和类鼻疽伯克霍尔德菌等重点病原体在内的细菌菌株显示出更高的全细胞活性。此外,我们还鉴定出了在感染动物模型中对MRSA和肺炎克雷伯菌具有体内疗效的TLM类似物。

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