1
|
Zhang X, Li Y, Cao Y, Wu Y, Cheng G. The Role of Noncoding RNA in the Transmission and Pathogenicity of Flaviviruses. Viruses 2024; 16:242. [PMID: 38400018 PMCID: PMC10892091 DOI: 10.3390/v16020242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/28/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024] Open
Abstract
Noncoding RNAs (ncRNAs) constitute a class of RNA molecules that lack protein-coding capacity. ncRNAs frequently modulate gene expression through specific interactions with target proteins or messenger RNAs, thereby playing integral roles in a wide array of cellular processes. The Flavivirus genus comprises several significant members, such as dengue virus (DENV), Zika virus (ZIKV), and yellow fever virus (YFV), which have caused global outbreaks, resulting in high morbidity and mortality in human populations. The life cycle of arthropod-borne flaviviruses encompasses their transmission between hematophagous insect vectors and mammalian hosts. During this process, a complex three-way interplay occurs among the pathogen, vector, and host, with ncRNAs exerting a critical regulatory influence. ncRNAs not only constitute a crucial regulatory mechanism that has emerged from the coevolution of viruses and their hosts but also hold potential as antiviral targets for controlling flavivirus epidemics. This review introduces the biogenesis of flavivirus-derived ncRNAs and summarizes the regulatory roles of ncRNAs in viral replication, vector-mediated viral transmission, antiviral innate immunity, and viral pathogenicity. A profound comprehension of the interplay between ncRNAs and flaviviruses will help formulate efficacious prophylactic and therapeutic strategies against flavivirus-related diseases.
Collapse
Affiliation(s)
- Xianwen Zhang
- Shenzhen Bay Laboratory, Institute of Infectious Diseases, Shenzhen 518000, China
| | - Yuhan Li
- New Cornerstone Science Laboratory, Tsinghua University-Peking University Joint Center for Life Sciences, School of Basic Medical Sciences, Tsinghua University, Beijing 100084, China; (Y.L.); (Y.C.)
| | - Yingyi Cao
- New Cornerstone Science Laboratory, Tsinghua University-Peking University Joint Center for Life Sciences, School of Basic Medical Sciences, Tsinghua University, Beijing 100084, China; (Y.L.); (Y.C.)
| | - Ying Wu
- State Key Laboratory of Virology and Hubei Province Key Laboratory of Allergy and Immunology, Institute of Medical Virology, TaiKang Medical School, Wuhan University, Wuhan 430072, China;
| | - Gong Cheng
- New Cornerstone Science Laboratory, Tsinghua University-Peking University Joint Center for Life Sciences, School of Basic Medical Sciences, Tsinghua University, Beijing 100084, China; (Y.L.); (Y.C.)
- Institute of Pathogenic Organisms, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
- Southwest United Graduate School, Kunming 650092, China
| |
Collapse
|
2
|
Liu Y, Guan W, Liu H. Subgenomic Flaviviral RNAs of Dengue Viruses. Viruses 2023; 15:2306. [PMID: 38140548 PMCID: PMC10747610 DOI: 10.3390/v15122306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 11/15/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023] Open
Abstract
Subgenomic flaviviral RNAs (sfRNAs) are produced during flavivirus infections in both arthropod and vertebrate cells. They are undegraded products originating from the viral 3' untranslated region (3' UTR), a result of the action of the host 5'-3' exoribonuclease, Xrn1, when it encounters specific RNA structures known as Xrn1-resistant RNAs (xrRNAs) within the viral 3' UTR. Dengue viruses generate three to four distinct species of sfRNAs through the presence of two xrRNAs and two dumbbell structures (DBs). The tertiary structures of xrRNAs have been characterized to form a ringlike structure around the 5' end of the viral RNA, effectively inhibiting the activity of Xrn1. The most important role of DENV sfRNAs is to inhibit host antiviral responses by interacting with viral and host proteins, thereby influencing viral pathogenicity, replicative fitness, epidemiological fitness, and transmission. In this review, we aimed to summarize the biogenesis, structures, and functions of DENV sfRNAs, exploring their implications for viral interference.
Collapse
Affiliation(s)
- Yi Liu
- Hubei Jiangxia Laboratory, Wuhan 430200, China
| | - Wuxiang Guan
- Hubei Jiangxia Laboratory, Wuhan 430200, China
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430207, China
| | - Haibin Liu
- Hubei Jiangxia Laboratory, Wuhan 430200, China
- Center for Emerging Infectious Diseases, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430207, China
| |
Collapse
|
3
|
Yang C, Yu C, Zhang Z, Wang D, Yuan X. Molecular Characteristics of Subgenomic RNAs and the Cap-Dependent Translational Advantage Relative to Corresponding Genomic RNAs of Tomato spotted wilt virus. Int J Mol Sci 2022; 23:ijms232315074. [PMID: 36499398 PMCID: PMC9741439 DOI: 10.3390/ijms232315074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/18/2022] [Accepted: 11/29/2022] [Indexed: 12/03/2022] Open
Abstract
Tomato spotted wilt virus (TSWV) causes severe viral diseases on many economically important plants of Solanaceae. During the infection process of TSWV, a series of 3'-truncated subgenomic RNAs (sgRNAs) relative to corresponding genomic RNAs were synthesized, which were responsible for the expression of some viral proteins. However, corresponding genomic RNAs (gRNAs) seem to possess the basic elements for expression of these viral proteins. In this study, molecular characteristics of sgRNAs superior to genomic RNAs in viral protein expression were identified. The 3' ends of sgRNAs do not cover the entire intergenic region (IGR) of TSWV genomic RNAs and contain the remarkable A-rich characteristics. In addition, the 3' terminal nucleotides of sgRNAs are conserved among different TSWV isolates. Based on the eIF4E recruitment assay and subsequent northern blot, it is suggested that the TSWV sgRNA, but not gRNA, is capped in vivo; this is why sgRNA is competent for protein expression relative to gRNA. In addition, the 5' and 3' untranslated region (UTR) of sgRNA-Ns can synergistically enhance cap-dependent translation. This study further enriched the understanding of sgRNAs of ambisense RNA viruses.
Collapse
Affiliation(s)
| | | | | | - Deya Wang
- Correspondence: (D.W.); (X.Y.); Tel.: +86-632-3786776 (D.W.); +86-538-8205608 (X.Y.)
| | - Xuefeng Yuan
- Correspondence: (D.W.); (X.Y.); Tel.: +86-632-3786776 (D.W.); +86-538-8205608 (X.Y.)
| |
Collapse
|
4
|
Avila-Bonilla RG, Salas-Benito JS. Interactions of host miRNAs in the flavivirus 3´UTR genome: From bioinformatics predictions to practical approaches. Front Cell Infect Microbiol 2022; 12:976843. [PMID: 36310869 PMCID: PMC9606609 DOI: 10.3389/fcimb.2022.976843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 09/27/2022] [Indexed: 11/16/2022] Open
Abstract
The genus Flavivirus of the Flaviviridae family includes important viruses, such as Dengue, Zika, West Nile, Japanese encephalitis, Murray Valley encephalitis, tick-borne encephalitis, Yellow fever, Saint Louis encephalitis, and Usutu viruses. They are transmitted by mosquitoes or ticks, and they can infect humans, causing fever, encephalitis, or haemorrhagic fever. The treatment resources for these diseases and the number of vaccines available are limited. It has been discovered that eukaryotic cells synthesize small RNA molecules that can bind specifically to sequences present in messenger RNAs to inhibit the translation process, thus regulating gene expression. These small RNAs have been named microRNAs, and they have an important impact on viral infections. In this review, we compiled the available information on miRNAs that can interact with the 3’ untranslated region (3’UTR) of the flavivirus genome, a conserved region that is important for viral replication and translation.
Collapse
Affiliation(s)
- Rodolfo Gamaliel Avila-Bonilla
- Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Edinburgh, United Kingdom
- *Correspondence: Rodolfo Gamaliel Avila-Bonilla, ; Juan Santiago Salas-Benito,
| | - Juan Santiago Salas-Benito
- Laboratorio de Biomedicina Moleculart 3, Maestría en Ciencias en Biomedicina Molecular, Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Mexico City, Mexico
- *Correspondence: Rodolfo Gamaliel Avila-Bonilla, ; Juan Santiago Salas-Benito,
| |
Collapse
|
5
|
Zhang QY, Liu SQ, Li XD, Li JQ, Zhang YN, Deng CL, Zhang HL, Li XF, Fang CX, Yang FX, Zhang B, Xu Y, Ye HQ. Sequence duplication in 3' UTR modulates virus replication and virulence of Japanese encephalitis virus. Emerg Microbes Infect 2021; 11:123-135. [PMID: 34877923 PMCID: PMC8725919 DOI: 10.1080/22221751.2021.2016354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Japanese encephalitis virus (JEV), an important neurotropic pathogen, belongs to the genus Flavivirus of the family Flaviviridae and has caused huge threat to public health. It is still obscure regarding the functions of stem-loop (SL) and dumbbell (DB) domains of JEV 3' UTR in viral replication and virulence. In the current study, using the infectious clone of JEV SA14 strain as a backbone, we constructed a series of deletion mutants of 3' UTR to investigate their effects on virus replication. The results showed that partial deletions within SL or DB domain had no apparent effects on virus replication in both mammalian (BHK-21) and mosquito (C6/36) cells, suggesting that they were not involved in viral host-specific replication. However, the entire SL domain deletion (ΔVR) significantly reduced virus replication in both cell lines, indicating the important role of the complete SL domain in virus replication. The revertant of ΔVR mutant virus was obtained by serial passage in BHK-21 cells that acquired a duplication of DB domain (DB-dup) in the 3' UTR, which greatly restored virus replication as well as the capability to produce the subgenomic flavivirus RNAs (sfRNAs). Interestingly, the DB-dup mutant virus was highly attenuated in C57BL/6 mice despite replicating similar to WT JEV. These findings demonstrate the significant roles of the duplicated structures in 3' UTR in JEV replication and provide a novel strategy for the design of live-attenuated vaccines.
Collapse
Affiliation(s)
- Qiu-Yan Zhang
- The Joint Center of Translational Precision Medicine, Department of Infectious Diseases, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China.,The Joint Center of Translational Precision Medicine, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Si-Qing Liu
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Xiao-Dan Li
- School of Medicine, Hunan Normal University, Changsha, People's Republic of China
| | - Jia-Qi Li
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People's Republic of China.,University of Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Ya-Nan Zhang
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Cheng-Lin Deng
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Hong-Lei Zhang
- College of Veterinary Medicine, Henan Agricultural University, Zhengzhou, People's Republic of China
| | - Xu-Fang Li
- The Joint Center of Translational Precision Medicine, Department of Infectious Diseases, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China
| | - Chun-Xiao Fang
- The Joint Center of Translational Precision Medicine, Department of Infectious Diseases, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China
| | - Feng-Xia Yang
- The Joint Center of Translational Precision Medicine, Department of Infectious Diseases, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China
| | - Bo Zhang
- The Joint Center of Translational Precision Medicine, Department of Infectious Diseases, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China.,The Joint Center of Translational Precision Medicine, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, People's Republic of China.,Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Yi Xu
- The Joint Center of Translational Precision Medicine, Department of Infectious Diseases, Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China.,The Joint Center of Translational Precision Medicine, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, People's Republic of China
| | - Han-Qing Ye
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, People's Republic of China
| |
Collapse
|
6
|
Zhang YN, Li N, Zhang QY, Liu J, Zhan SL, Gao L, Zeng XY, Yu F, Zhang HQ, Li XD, Deng CL, Shi PY, Yuan ZM, Yuan SP, Ye HQ, Zhang B. Rational design of West Nile virus vaccine through large replacement of 3' UTR with internal poly(A). EMBO Mol Med 2021; 13:e14108. [PMID: 34351689 PMCID: PMC8422072 DOI: 10.15252/emmm.202114108] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 06/30/2021] [Accepted: 07/09/2021] [Indexed: 11/29/2022] Open
Abstract
The genus Flavivirus comprises numerous emerging and re-emerging arboviruses causing human illness. Vaccines are the best approach to prevent flavivirus diseases. But pathogen diversities are always one of the major hindrances for timely development of new vaccines when confronting unpredicted flavivirus outbreaks. We used West Nile virus (WNV) as a model to develop a new live-attenuated vaccine (LAV), WNV-poly(A), by replacing 5' portion (corresponding to SL and DB domains in WNV) of 3'-UTR with internal poly(A) tract. WNV-poly(A) not only propagated efficiently in Vero cells, but also was highly attenuated in mouse model. A single-dose vaccination elicited robust and long-lasting immune responses, conferring full protection against WNV challenge. Such "poly(A)" vaccine strategy may be promising for wide application in the development of flavivirus LAVs because of its general target regions in flaviviruses.
Collapse
Affiliation(s)
- Ya-Nan Zhang
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Na Li
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Qiu-Yan Zhang
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Jing Liu
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Shun-Li Zhan
- Beijing Shunlei Biotechnology Co. Ltd., Beijing, China
| | - Lei Gao
- Beijing Shunlei Biotechnology Co. Ltd., Beijing, China
| | - Xiang-Yue Zeng
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Fang Yu
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Hong-Qing Zhang
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Xiao-Dan Li
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Cheng-Lin Deng
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Pei-Yong Shi
- University of Texas Medical Branch, Galveston, TX, USA
| | - Zhi-Ming Yuan
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | | | - Han-Qing Ye
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| | - Bo Zhang
- Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, China
| |
Collapse
|
7
|
Melidis L, Hill HJ, Coltman NJ, Davies SP, Winczura K, Chauhan T, Craig JS, Garai A, Hooper CAJ, Egan RT, McKeating JA, Hodges NJ, Stamataki Z, Grzechnik P, Hannon MJ. Supramolecular Cylinders Target Bulge Structures in the 5' UTR of the RNA Genome of SARS-CoV-2 and Inhibit Viral Replication. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 133:18292-18299. [PMID: 38505190 PMCID: PMC10947172 DOI: 10.1002/ange.202104179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Indexed: 01/09/2023]
Abstract
The untranslated regions (UTRs) of viral genomes contain a variety of conserved yet dynamic structures crucial for viral replication, providing drug targets for the development of broad spectrum anti-virals. We combine in vitro RNA analysis with molecular dynamics simulations to build the first 3D models of the structure and dynamics of key regions of the 5' UTR of the SARS-CoV-2 genome. Furthermore, we determine the binding of metallo-supramolecular helicates (cylinders) to this RNA structure. These nano-size agents are uniquely able to thread through RNA junctions and we identify their binding to a 3-base bulge and the central cross 4-way junction located in stem loop 5. Finally, we show these RNA-binding cylinders suppress SARS-CoV-2 replication, highlighting their potential as novel anti-viral agents.
Collapse
Affiliation(s)
- Lazaros Melidis
- Physical Sciences for Health CentreUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Harriet J. Hill
- Institute of Immunology and ImmunotherapyUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | | | - Scott P. Davies
- Institute of Immunology and ImmunotherapyUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Kinga Winczura
- School of BiosciencesUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Tasha Chauhan
- Physical Sciences for Health CentreUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - James S. Craig
- Physical Sciences for Health CentreUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Aditya Garai
- School of ChemistryUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | | | - Ross T. Egan
- School of ChemistryUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Jane A. McKeating
- Nuffield Department of Medicine & Chinese Academy of Medical Sciences (CAMS) Oxford Institute (COI)Oxford UniversityOxfordOX3 7BNUK
| | - Nikolas J. Hodges
- School of BiosciencesUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Zania Stamataki
- Institute of Immunology and ImmunotherapyUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Pawel Grzechnik
- School of BiosciencesUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Michael J. Hannon
- Physical Sciences for Health CentreUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
- School of ChemistryUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| |
Collapse
|
8
|
Melidis L, Hill HJ, Coltman NJ, Davies SP, Winczura K, Chauhan T, Craig JS, Garai A, Hooper CAJ, Egan RT, McKeating JA, Hodges NJ, Stamataki Z, Grzechnik P, Hannon MJ. Supramolecular Cylinders Target Bulge Structures in the 5' UTR of the RNA Genome of SARS-CoV-2 and Inhibit Viral Replication*. Angew Chem Int Ed Engl 2021; 60:18144-18151. [PMID: 33915014 PMCID: PMC8222931 DOI: 10.1002/anie.202104179] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Indexed: 12/13/2022]
Abstract
The untranslated regions (UTRs) of viral genomes contain a variety of conserved yet dynamic structures crucial for viral replication, providing drug targets for the development of broad spectrum anti-virals. We combine in vitro RNA analysis with molecular dynamics simulations to build the first 3D models of the structure and dynamics of key regions of the 5' UTR of the SARS-CoV-2 genome. Furthermore, we determine the binding of metallo-supramolecular helicates (cylinders) to this RNA structure. These nano-size agents are uniquely able to thread through RNA junctions and we identify their binding to a 3-base bulge and the central cross 4-way junction located in stem loop 5. Finally, we show these RNA-binding cylinders suppress SARS-CoV-2 replication, highlighting their potential as novel anti-viral agents.
Collapse
Affiliation(s)
- Lazaros Melidis
- Physical Sciences for Health CentreUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Harriet J. Hill
- Institute of Immunology and ImmunotherapyUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | | | - Scott P. Davies
- Institute of Immunology and ImmunotherapyUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Kinga Winczura
- School of BiosciencesUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Tasha Chauhan
- Physical Sciences for Health CentreUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - James S. Craig
- Physical Sciences for Health CentreUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Aditya Garai
- School of ChemistryUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | | | - Ross T. Egan
- School of ChemistryUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Jane A. McKeating
- Nuffield Department of Medicine & Chinese Academy of Medical Sciences (CAMS) Oxford Institute (COI)Oxford UniversityOxfordOX3 7BNUK
| | - Nikolas J. Hodges
- School of BiosciencesUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Zania Stamataki
- Institute of Immunology and ImmunotherapyUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Pawel Grzechnik
- School of BiosciencesUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| | - Michael J. Hannon
- Physical Sciences for Health CentreUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
- School of ChemistryUniversity of BirminghamEdgbastonBirminghamB15 2TTUK
| |
Collapse
|
9
|
Liu J, Ren X, Li H, Yu X, Zhao B, Liu B, Ning Z. Development of the reverse genetics system for emerging atypical porcine pestivirus using in vitro and intracellular transcription systems. Virus Res 2020; 283:197975. [PMID: 32311384 DOI: 10.1016/j.virusres.2020.197975] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 01/31/2023]
Abstract
Atypical porcine pestivirus (APPV) is a novel pestivirus causing congenital tremor (CT) type AII in piglets and exhibiting a broad geographical distribution. Lack of an operating system for the viral genome is one of bottlenecks which restrict further research on pathogenesis and gene functions of APPV. Reverse genetics system (RGS) is a feasible solution to this bottleneck problem, but, to-date, no RGSs have been developed for APPV. Here, for the first time, recombinant APPV CH-GD2017 were rescued using in vitro and intracellular transcription systems and the virons were observed via transmission electron microscopy. As the process of in vitro transcription is time-consuming and inefficient, a full-length cDNA clone in an intracellular transcription was further constructed using an RNA polymerase II system. Then, the rescued virus was identified via RT-PCR detection, indirect immunofluorescent assay, and transmission electron microscopy. Development of the RGS for APPV will provide an important tool for further research on this newly emerging pathogen.
Collapse
Affiliation(s)
- Jianxin Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642
| | - Xujiao Ren
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642
| | - Huizi Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642
| | - Xianglong Yu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642
| | - Bingqian Zhao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642
| | - Boyang Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642
| | - Zhangyong Ning
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642.
| |
Collapse
|
10
|
Mrozowich T, Henrickson A, Demeler B, Patel TR. Nanoscale Structure Determination of Murray Valley Encephalitis and Powassan Virus Non-Coding RNAs. Viruses 2020; 12:E190. [PMID: 32046304 PMCID: PMC7077200 DOI: 10.3390/v12020190] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 01/02/2023] Open
Abstract
Viral infections are responsible for numerous deaths worldwide. Flaviviruses, which contain RNA as their genetic material, are one of the most pathogenic families of viruses. There is an increasing amount of evidence suggesting that their 5' and 3' non-coding terminal regions are critical for their survival. Information on their structural features is essential to gain detailed insights into their functions and interactions with host proteins. In this study, the 5' and 3' terminal regions of Murray Valley encephalitis virus and Powassan virus were examined using biophysical and computational modeling methods. First, we used size exclusion chromatography and analytical ultracentrifuge methods to investigate the purity of in-vitro transcribed RNAs. Next, we employed small-angle X-ray scattering techniques to study solution conformation and low-resolution structures of these RNAs, which suggest that the 3' terminal regions are highly extended as compared to the 5' terminal regions for both viruses. Using computational modeling tools, we reconstructed 3-dimensional structures of each RNA fragment and compared them with derived small-angle X-ray scattering low-resolution structures. This approach allowed us to reinforce that the 5' terminal regions adopt more dynamic structures compared to the mainly double-stranded structures of the 3' terminal regions.
Collapse
Affiliation(s)
- Tyler Mrozowich
- Department of Chemistry and Biochemistry, Alberta RNA Research and Training Institute, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada; (T.M.); (A.H.); (B.D.)
| | - Amy Henrickson
- Department of Chemistry and Biochemistry, Alberta RNA Research and Training Institute, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada; (T.M.); (A.H.); (B.D.)
| | - Borries Demeler
- Department of Chemistry and Biochemistry, Alberta RNA Research and Training Institute, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada; (T.M.); (A.H.); (B.D.)
- Department of Chemistry And Biochemistry, University of Montana, Missoula, MT 59812, USA
- NorthWest Biophysics Consortium, University of Lethbridge, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada
| | - Trushar R Patel
- Department of Chemistry and Biochemistry, Alberta RNA Research and Training Institute, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada; (T.M.); (A.H.); (B.D.)
- NorthWest Biophysics Consortium, University of Lethbridge, University of Lethbridge, 4401 University Drive, Lethbridge, AB T1K 3M4, Canada
- Department of Microbiology, Immunology and Infectious Disease, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 1N4, Canada
- Li Ka Shing Institute of Virology and Discovery Lab, University of Alberta, Edmonton, AB T6G 2E1, Canada
| |
Collapse
|