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  3. Discovery and evaluation of new compounds targeting ribosomal protein S1 in antibiotic-resistant Mycobacterium Tuberculosis

Discovery and evaluation of new compounds targeting ribosomal protein S1 in antibiotic-resistant Mycobacterium Tuberculosis

  • Eur J Med Chem. 2020 Jun 15;196:112317. doi: 10.1016/j.ejmech.2020.112317.
Yazhuang Dai 1,  Yinqiu Xu 2,  Chenyun Guo 3,  Xiaowen Xue 2,  Donghai Lin 4,  Kejiang Lin 5
Affiliations

Affiliations

  • 1 Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China; Hangzhou Ipharmacare Co., LTD, Hangzhou, 310000, China.
  • 2 Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
  • 3 The Key Laboratory for Chemical Biology of Fujian Province, MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
  • 4 The Key Laboratory for Chemical Biology of Fujian Province, MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China. Electronic address: dhlin@xmu.edu.cn.
  • 5 Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China. Electronic address: link@cpu.edu.cn.
PMID: 32311606 DOI: 10.1016/j.ejmech.2020.112317
Abstract

The emergence of antibiotic-resistant Mycobacterium Tuberculosis (Mtb) infections compels new treatment strategies, of which targeting trans-translation is promising. During the trans-translation process, the ribosomal protein S1 (RpsA) plays a key role, and the Ala438 mutant is related to pyrazinamide (PZA) resistance, which shows its effects after being hydrolysed to pyrazinoic acid (POA). In this study, based on the structure of the RpsA C-terminal domain (RpsA-CTD) and POA complex, new compounds were designed. After being synthesized, the compounds were tested in vitro with saturation transfer difference (STD), fluorescence quenching titration (FQT) and chemical shift perturbation (CSP) experiments. Finally, six of the 17 new compounds have high affinity for both RpsA-CTD and its Ala438 deletion mutant. The active compounds provide new choices for targeting trans-translation in Mtb, and the analysis of the structure-activity relationships will be helpful for further structural modifications based on derivatives of 2-((hypoxanthine-2-yl)thio)acetic acid and 2-((5-hydroxylflavone-7-yl)oxy)acetamide.

Keywords

Anti-Tuberculosis agents; Pyrazinamide; Ribosomal protein S1; Trans-translation.

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