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Cheng C, Tan MJA, Chan KWK, Choy MMJ, Roman N, Arnold DDR, Bifani AM, Kong SYZ, Bist P, Nath BK, Swarbrick CMD, Forwood JK, Vasudevan SG. Serotype-Specific Regulation of Dengue Virus NS5 Protein Subcellular Localization. ACS Infect Dis 2024; 10:2047-2062. [PMID: 38811007 PMCID: PMC11184549 DOI: 10.1021/acsinfecdis.4c00054] [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: 01/17/2024] [Revised: 05/01/2024] [Accepted: 05/02/2024] [Indexed: 05/31/2024]
Abstract
Dengue virus (DENV) nonstructural protein 5 (NS5), consisting of methyltransferase and RNA-dependent RNA polymerase (RdRp) domains, is critical for viral RNA synthesis within endoplasmic reticulum-derived replication complexes in the cytoplasm. However, a significant proportion of NS5 is localized to the nucleus of infected cells for DENV2, 3, and 4, whereas DENV1 NS5 is localized diffusely in the cytoplasm. We still have an incomplete understanding of how the DENV NS5 subcellular localization is regulated. Within NS5, two putative nuclear localization signal (NLS) sequences have been identified: NLSCentral residing in the palm of the RdRp domain as well as the recently discovered NLSC-term residing in the flexible region at the C-terminal of the RdRp domain. We have previously shown that DENV2 NS5 nuclear localization can be significantly reduced by single-point mutations to the NLSC-term. Here, we present biochemical, virological, and structural data demonstrating that the relative importance of either NLS in NS5 nuclear localization is unique to each of the four DENV serotypes. DENV1 NS5's cytoplasmic localization appears to be due to a functionally weak interaction between its NLSCentral and importin-α (IMPα), while DENV2 NS5 is almost exclusively nuclear through its NLSC-term's strong interaction with IMPα. Both NLSs of DENV3 NS5 appear to contribute to directing its nuclear localization. Lastly, in the case of DENV4, the regulation of its NS5 nuclear localization remains an enigma but appears to be associated with its NLSC-term.
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Affiliation(s)
- Colin
Xinru Cheng
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
| | - Min Jie Alvin Tan
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
| | - Kitti Wing Ki Chan
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
| | - Milly Ming Ju Choy
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
| | - Noelia Roman
- School
of Dentistry and Medical Sciences, Charles
Sturt University, Wagga
Wagga, NSW 2678, Australia
| | - Daniel D. R. Arnold
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
- School
of Dentistry and Medical Sciences, Charles
Sturt University, Wagga
Wagga, NSW 2678, Australia
| | - Amanda Makha Bifani
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
| | - Sean Yao Zu Kong
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
| | - Pradeep Bist
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
| | - Babu K. Nath
- School
of Dentistry and Medical Sciences, Charles
Sturt University, Wagga
Wagga, NSW 2678, Australia
| | - Crystall M. D. Swarbrick
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
- Biosecurity
Research Program and Training Centre, Gulbali Institute, Charles Sturt University, Wagga Wagga, NSW 2678, Australia
- Institute
for Glycomics, Griffith University, Southport 4222, Australia
| | - Jade K. Forwood
- School
of Dentistry and Medical Sciences, Charles
Sturt University, Wagga
Wagga, NSW 2678, Australia
- Biosecurity
Research Program and Training Centre, Gulbali Institute, Charles Sturt University, Wagga Wagga, NSW 2678, Australia
| | - Subhash G. Vasudevan
- Programme
in Emerging Infectious Diseases, Duke-NUS
Medical School, Singapore 169857, Singapore
- Department
of Microbiology and Immunology, National
University of Singapore, Singapore 117545, Singapore
- Institute
for Glycomics, Griffith University, Southport 4222, Australia
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2
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Zeng M, Chen S, Zhang W, Duan Y, Jiang B, Pan X, Wang M, Jia R, Zhu D, Liu M, Zhao X, Yang Q, Wu Y, Zhang S, Huang J, Ou X, Mao S, Tian B, Gao Q, Cheng A. Nuclear localization of duck Tembusu virus NS5 protein attenuates viral replication in vitro and NS5-NS2B3 interaction. Vet Microbiol 2021; 262:109239. [PMID: 34555732 DOI: 10.1016/j.vetmic.2021.109239] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 09/11/2021] [Indexed: 11/15/2022]
Abstract
Duck Tembusu virus (TMUV) belongs to the flavivirus genus whose genome replication involved in capping and RNA synthesis dominating by nonstructural protein 5 (NS5). Flaviviral replication has been well documented to occur in the cytoplasm, but the effect of NS5 to gain access to the nucleus remains controversial. Here, TMUV NS5 was observed to localize within the cytoplasm of transfected and infected cells and co-localized with the endoplasmic reticulum. We introduced two arginine mutations into the N390 and Q392 (N390R and Q392R) of the NS5 bipartite nuclear localization sequence (α/βNLS) and designated that mutagenesis as NS5NLSmut, which has shown the ability to access the nucleus and hence attenuates viral replication and production in vitro. Additionally, there was no significant difference between the recovered wild-type TMUV (rTMUV-WT) and engineered mutant (rTMUV-NS5NLSmut) on plaque morphology, survival rate of infected duck embryos or virus copies in tissues. Considering that NS5NLSmut is mainly located in the cytoplasm of rTMUV-NS5NLSmut infected cells at the early stage of infection. We further confirmed that NS5NLSmut attenuated its interaction with nonstructural NS2B-NS3 (NS2B3) following transfection and infection. Meanwhile, the rTMUV-NS5NLSmut tended to stimulate more interferon beta (IFNβ) than rTMUV-WT. However, preliminary study on transient NS5 and NS5NLSmut detected the same levels of IFNβ mRNA mediated by RIG-I detection of NS5 RNA polymerase activity in cell. In summary, these results provide further insights into the relationship between the viral property and subcellular localization of flavivirus NS5 in terms of the NS5-NS2B3 interaction.
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Affiliation(s)
- Miao Zeng
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Shun Chen
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China.
| | - Wei Zhang
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Yanping Duan
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Bowen Jiang
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Xin Pan
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Mingshu Wang
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Renyong Jia
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Dekang Zhu
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Mafeng Liu
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Xinxin Zhao
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Qiao Yang
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Ying Wu
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Shaqiu Zhang
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Juan Huang
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Xumin Ou
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Sai Mao
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Bin Tian
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Qun Gao
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China
| | - Anchun Cheng
- Research Center of Avian Disease, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Institute of Preventive Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang District, Chengdu City, Sichuan Province, 611130, China; Key Laboratory of Animal Disease and Human Health of Sichuan Province, Wenjiang District, Chengdu City, Sichuan Province, 611130, China.
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3
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Albentosa-González L, Jimenez de Oya N, Arias A, Clemente-Casares P, Martin-Acebes MÁ, Saiz JC, Sabariegos R, Mas A. Akt Kinase Intervenes in Flavivirus Replication by Interacting with Viral Protein NS5. Viruses 2021; 13:v13050896. [PMID: 34066055 PMCID: PMC8151281 DOI: 10.3390/v13050896] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/06/2021] [Accepted: 05/08/2021] [Indexed: 12/30/2022] Open
Abstract
Arthropod-borne flaviviruses, such as Zika virus (ZIKV), Usutu virus (USUV), and West Nile virus (WNV), are a growing cause of human illness and death around the world. Presently, no licensed antivirals to control them are available and, therefore, search for broad-spectrum antivirals, including host-directed compounds, is essential. The PI3K/Akt pathway controls essential cellular functions involved in cell metabolism and proliferation. Moreover, Akt has been found to participate in modulating replication in different viruses including the flaviviruses. In this work we studied the interaction of flavivirus NS5 polymerases with the cellular kinase Akt. In vitro NS5 phosphorylation experiments with Akt showed that flavivirus NS5 polymerases are phosphorylated and co-immunoprecipitate by Akt. Polymerase activity assays of Ala- and Glu-generated mutants for the Akt-phosphorylated residues also indicate that Glu mutants of ZIKV and USUV NS5s present a reduced primer-extension activity that was not observed in WNV mutants. Furthermore, treatment with Akt inhibitors (MK-2206, honokiol and ipatasertib) reduced USUV and ZIKV titers in cell culture but, except for honokiol, not WNV. All these findings suggest an important role for Akt in flavivirus replication although with specific differences among viruses and encourage further investigations to examine the PI3K/Akt/mTOR pathway as an antiviral potential target.
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Affiliation(s)
- Laura Albentosa-González
- Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, 02008 Albacete, Spain; (L.A.-G.); (A.A.); (P.C.-C.)
| | - Nereida Jimenez de Oya
- ZOOVIR, Department of Biotechnology, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, 28040 Madrid, Spain; (N.J.d.O.); (M.Á.M.-A.); (J.C.S.)
| | - Armando Arias
- Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, 02008 Albacete, Spain; (L.A.-G.); (A.A.); (P.C.-C.)
- Unidad de Biomedicina UCLM-CSIC, 02008 Albacete, Spain
- Escuela Técnica Superior de Ingenieros Agrónomos, Universidad de Castilla-La Mancha, 02071 Albacete, Spain
| | - Pilar Clemente-Casares
- Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, 02008 Albacete, Spain; (L.A.-G.); (A.A.); (P.C.-C.)
- Unidad de Biomedicina UCLM-CSIC, 02008 Albacete, Spain
- Facultad de Farmacia, Universidad de Castilla-La Mancha, 02008 Albacete, Spain
| | - Miguel Ángel Martin-Acebes
- ZOOVIR, Department of Biotechnology, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, 28040 Madrid, Spain; (N.J.d.O.); (M.Á.M.-A.); (J.C.S.)
| | - Juan Carlos Saiz
- ZOOVIR, Department of Biotechnology, Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, 28040 Madrid, Spain; (N.J.d.O.); (M.Á.M.-A.); (J.C.S.)
| | - Rosario Sabariegos
- Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, 02008 Albacete, Spain; (L.A.-G.); (A.A.); (P.C.-C.)
- Unidad de Biomedicina UCLM-CSIC, 02008 Albacete, Spain
- Facultad de Medicina, Universidad de Castilla-La Mancha, 02008 Albacete, Spain
- Correspondence: (R.S.); (A.M.)
| | - Antonio Mas
- Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, 02008 Albacete, Spain; (L.A.-G.); (A.A.); (P.C.-C.)
- Unidad de Biomedicina UCLM-CSIC, 02008 Albacete, Spain
- Facultad de Farmacia, Universidad de Castilla-La Mancha, 02008 Albacete, Spain
- Correspondence: (R.S.); (A.M.)
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