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Identification and Analysis of Novel Inhibitors against NS3 Helicase and NS5B RNA-Dependent RNA Polymerase from Hepatitis C Virus 1b (Con1)
Yang, Na1,2; Sun, Chaomin1,2; Zhang, Lixin2,3; Liu, Jianguo1,2; Song, Fuhang4
2017-11-02
Source PublicationFRONTIERS IN MICROBIOLOGY
Volume8
SubtypeArticle
AbstractHepatitis C virus (HCV) leads to severe liver diseases, including liver fibrosis, cirrhosis and hepatocellular carcinoma. Non-structural protein 3 helicase (NS3h) and nonstructural protein 5B RNA-dependent RNA polymerase (NS5B) are involved in the replication of HCV RNA genome, and have been proved to be excellent targets for discovery of direct-acting antivirals. In this study, two high-throughput screening systems, fluorescence polarization (FP)-based ssDNA binding assay and fluorescence intensity (FI)-based dsRNA formation assay, were constructed to identify candidate NS3h and NS5B inhibitors, respectively. A library of approximately 800 small molecules and crude extracts, derived from marine microorganisms or purchased from the National Compound Resource Center, China, were screened, with three hits selected for further study. Natural compound No. 3A5, isolated from marine fungi, inhibited NS3h activity with an IC50 value of 2.8 mu M. We further demonstrated that compound No. 3A5 inhibited the abilities of NS3h to bind ssDNA in electrophoretic mobility shift assay and to hydrolyze ATP. The NS3h-inhibitory activity of compound No. 3A5 was reversible in our dilution assay, which indicated there was no stable NS3h-No. 3A5 complex formed. Additionally, compound No. 3A5 exhibited no binding selectivity on NS3h or single strand binding protein of Escherichia coli. In NS5B assays, commercial compounds No. 39 and No. 94 previously reported as kinase inhibitors were found to disrupt dsRNA formation, and their IC50 values were 62.9 and 18.8 mu M, respectively. These results highlight how identifying new uses for existing drugs is an effective method for discovering novel HCV inhibitors. To our knowledge, all inhibitors reported in this study were originally discovered with HCV anti-non-structural protein activities in vitro.
KeywordHepatitis c Virus Ns3 Helicase Ns5b Rna-dependent Rna Polymerase High Throughput Inhibitor
DOI10.3389/fmicb.2017.02153
Indexed BySCI
Language英语
WOS IDWOS:000414256200001
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143059
Collection实验海洋生物学重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao, Peoples R China
3.East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai, Peoples R China
4.Chinese Acad Sci, Inst Microbiol, Key Lab Pathogen Microbiol & Immunol, Beijing, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yang, Na,Sun, Chaomin,Zhang, Lixin,et al. Identification and Analysis of Novel Inhibitors against NS3 Helicase and NS5B RNA-Dependent RNA Polymerase from Hepatitis C Virus 1b (Con1)[J]. FRONTIERS IN MICROBIOLOGY,2017,8.
APA Yang, Na,Sun, Chaomin,Zhang, Lixin,Liu, Jianguo,&Song, Fuhang.(2017).Identification and Analysis of Novel Inhibitors against NS3 Helicase and NS5B RNA-Dependent RNA Polymerase from Hepatitis C Virus 1b (Con1).FRONTIERS IN MICROBIOLOGY,8.
MLA Yang, Na,et al."Identification and Analysis of Novel Inhibitors against NS3 Helicase and NS5B RNA-Dependent RNA Polymerase from Hepatitis C Virus 1b (Con1)".FRONTIERS IN MICROBIOLOGY 8(2017).
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