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Li Y, Liu X, Tang P, Zhang H, Qin Q, Zhang Z. Genome sequence and organization of the Mythimna (formerly Pseudaletia) unipuncta granulovirus Hawaiian strain. Sci Rep 2021; 11:414. [PMID: 33432025 PMCID: PMC7801670 DOI: 10.1038/s41598-020-80117-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 12/17/2020] [Indexed: 11/14/2022] Open
Abstract
Purified occlusion bodies (OBs) of Mythimna (formerly Pseudaletia) unipuncta (the true armyworm) granulovirus Hawaiian strain (MyunGV-A) were observed, showing typical GV morphological characteristics under scanning and transmission electron microscopy (EM). The genome of MyunGV-A was completely sequenced and analysed. The genome is 176,677 bp in size, with a G+C content of 39.79%. It contains 183 open reading frames (ORFs) encoding 50 or more amino acids with minimal overlap. Comparison of MyunGV-A with TnGV, XcGV, and HearGV genomes revealed extensive sequence similarity and collinearity, and the four genomes contain the same nine homologous regions (hrs) with conserved structures and locations. Three unique genes, 12 baculovirus repeated ORF (bro), 2 helicase, and 3 enhancin genes, were identified. In particular, two repeated genes (ORF39 and 49) are present in the genome, in reverse and complementarily orientations. Twenty-four OB proteins were identified from the putative protein database of MyunGV-A. In addition, MyunGV-A belongs to the Betabaculovirus group and is most closely related to TnGV (99% amino acid identity) according to a phylogenetic tree based on the combined amino acid sequences of 38 core gene contents.
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Affiliation(s)
- Yinü Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xingjian Liu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ping Tang
- Jiangsu University of Science and Technology, Zhenjiang, China
| | - Huan Zhang
- Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Qilian Qin
- Institute of Zoology, Chinese Academy of Sciences, Beijing, China.
| | - Zhifang Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.
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2
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Fabre ML, Masson T, Haase S, Ferrelli ML, Romanowski V. A simplified strategy to package foreign proteins into baculovirus occlusion bodies without engineering the viral genome. J Biotechnol 2020; 307:175-181. [PMID: 31715205 DOI: 10.1016/j.jbiotec.2019.10.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 10/08/2019] [Accepted: 10/26/2019] [Indexed: 11/25/2022]
Abstract
Polyhedron envelope protein (PEP) is the major component of the calyx that surrounds the baculovirus occlusion body (OB). PEP has been associated with the stabilization and resistance of polyhedra in the environment. Due to the abundant levels of PEP in OBs, we decided to use this protein as a fusion partner to redirect foreign proteins to baculovirus polyhedra. In this study we developed a strategy that involves the generation of a monoclonal transformed insect cell line expressing a protein of interest fused to the the Anticarsia gemmatalis multiple nucleopolyhedrovirus (AgMNPV) N-terminus of PEP that enables the packaging of foreign proteins into the OBs without generating a recombinant baculovirus. This proved to be an efficient platform that could be exploited to improve wild type baculovirus for their use as bioinsecticides without facing the concerns of releasing genetically modified DNA to the environment and bypassing the associated regulatory issues. We demonstrated, using immunological, proteomic and microscopy techniques, that the envelope of AgMNPV OBs can effectively trap chimeric proteins in an infected insect cell line expressing AgMNPV PEP fused to the enhanced green fluorescent protein (eGFP). Furthermore, packaging of chimeric PEP also took place with heterologous OBs such as those of Autographa californica multiple nucleopolyhedrovirus (AcMNPV), another group I alphabaculovirus.
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Affiliation(s)
- María Laura Fabre
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Tomás Masson
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Santiago Haase
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - María Leticia Ferrelli
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Víctor Romanowski
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina.
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3
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Miele SAB, Cerrudo CS, Parsza CN, Nugnes MV, Mengual Gómez DL, Belaich MN, Ghiringhelli PD. Identification of Multiple Replication Stages and Origins in the Nucleopolyhedrovirus of Anticarsia gemmatalis. Viruses 2019; 11:E648. [PMID: 31311127 PMCID: PMC6669502 DOI: 10.3390/v11070648] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/10/2019] [Accepted: 07/12/2019] [Indexed: 12/13/2022] Open
Abstract
To understand the mechanism of replication used by baculoviruses, it is essential to describe all the factors involved, including virus and host proteins and the sequences where DNA synthesis starts. A lot of work on this topic has been done, but there is still confusion in defining what sequence/s act in such functions, and the mechanism of replication is not very well understood. In this work, we performed an AgMNPV replication kinetics into the susceptible UFL-Ag-286 cells to estimate viral genome synthesis rates. We found that the viral DNA exponentially increases in two different phases that are temporally separated by an interval of 5 h, probably suggesting the occurrence of two different mechanisms of replication. Then, we prepared a plasmid library containing virus fragments (0.5-2 kbp), which were transfected and infected with AgMNPV in UFL-Ag-286 cells. We identified 12 virus fragments which acted as origins of replication (ORI). Those fragments are in close proximity to core genes. This association to the core genome would ensure vertical transmission of ORIs. We also predict the presence of common structures on those fragments that probably recruit the replication machinery, a structure also present in previously reported ORIs in baculoviruses.
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Affiliation(s)
- Solange A B Miele
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular-Área Virosis de Insectos, Instituto de Microbiología Básica y Aplicada (IMBA), Universidad Nacional de Quilmes, CONICET, Bernal B1876BXD, Argentina
- Institute for Integrative Biology of the Cell (I2BC), Evolution and Maintenance of Circular Chromosomes, CEA, CNRS, Univ. Paris Sud, Université Paris-Saclay, 91190 Saint-Aubin, France
| | - Carolina S Cerrudo
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular-Área Virosis de Insectos, Instituto de Microbiología Básica y Aplicada (IMBA), Universidad Nacional de Quilmes, CONICET, Bernal B1876BXD, Argentina
| | - Cintia N Parsza
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular-Área Virosis de Insectos, Instituto de Microbiología Básica y Aplicada (IMBA), Universidad Nacional de Quilmes, CONICET, Bernal B1876BXD, Argentina
| | - María Victoria Nugnes
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular-Área Virosis de Insectos, Instituto de Microbiología Básica y Aplicada (IMBA), Universidad Nacional de Quilmes, CONICET, Bernal B1876BXD, Argentina
| | - Diego L Mengual Gómez
- Laboratorio de Oncología Molecular, Universidad Nacional de Quilmes, CONICET, Bernal B1876BXD, Argentina
| | - Mariano N Belaich
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular-Área Virosis de Insectos, Instituto de Microbiología Básica y Aplicada (IMBA), Universidad Nacional de Quilmes, CONICET, Bernal B1876BXD, Argentina.
| | - P Daniel Ghiringhelli
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular-Área Virosis de Insectos, Instituto de Microbiología Básica y Aplicada (IMBA), Universidad Nacional de Quilmes, CONICET, Bernal B1876BXD, Argentina
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4
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Lai Q, Zhu L, Xu L, Yuan M, Wu W, Yang K. AcMNPV PKIP is associated with nucleocapsid of budded virions and involved in nucleocapsid assembly. Virus Res 2019; 268:27-37. [DOI: 10.1016/j.virusres.2019.05.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/20/2019] [Accepted: 05/23/2019] [Indexed: 10/26/2022]
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5
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Masson T, Fabre ML, Ferrelli ML, Pidre ML, Romanowski V. Protein composition of the occlusion bodies of Epinotia aporema granulovirus. PLoS One 2019; 14:e0207735. [PMID: 30753194 PMCID: PMC6372164 DOI: 10.1371/journal.pone.0207735] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/21/2019] [Indexed: 12/28/2022] Open
Abstract
Within family Baculoviridae, members of the Betabaculovirus genus are employed as biocontrol agents against lepidopteran pests, either alone or in combination with selected members of the Alphabaculovirus genus. Epinotia aporema granulovirus (EpapGV) is a fast killing betabaculovirus that infects the bean shoot borer (E. aporema) and is a promising biopesticide. Because occlusion bodies (OBs) play a key role in baculovirus horizontal transmission, we investigated the composition of EpapGV OBs. Using mass spectrometry-based proteomics we could identify 56 proteins that are included in the OBs during the final stages of larval infection. Our data provides experimental validation of several annotated hypothetical coding sequences. Proteogenomic mapping against genomic sequence detected a previously unannotated ac110-like core gene and a putative translation fusion product of ORFs epap48 and epap49. Comparative studies of the proteomes available for the family Baculoviridae highlight the conservation of core gene products as parts of the occluded virion. Two proteins specific for betabaculoviruses (Epap48 and Epap95) are incorporated into OBs. Moreover, quantification based on emPAI values showed that Epap95 is one of the most abundant components of EpapGV OBs.
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Affiliation(s)
- Tomás Masson
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - María Laura Fabre
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - María Leticia Ferrelli
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Matías Luis Pidre
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
| | - Víctor Romanowski
- Instituto de Biotecnología y Biología Molecular (IBBM, UNLP-CONICET), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Buenos Aires, Argentina
- * E-mail:
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6
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Nayyar N, Kaur I, Malhotra P, Bhatnagar RK. Quantitative proteomics of Sf21 cells during Baculovirus infection reveals progressive host proteome changes and its regulation by viral miRNA. Sci Rep 2017; 7:10902. [PMID: 28883418 PMCID: PMC5589936 DOI: 10.1038/s41598-017-10787-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 08/11/2017] [Indexed: 11/09/2022] Open
Abstract
System level knowledge of alterations in host is crucial to elucidate the molecular events of viral pathogenesis and to develop strategies to block viral establishment and amplification. Here, we applied quantitative proteomics approach to study global proteome changes in the host; Spodoptera frugiperda upon infection by a baculovirus, Spodoptera litura NPV at two stages i.e. 12 h and 72 h post infection. At 12 hpi, >95% of host proteins remained stable, however at 72 hpi, 52% host proteins exhibited downregulation of 2-fold or more. Functional analysis revealed significant upregulation of transposition and proteasomal machinery while translation, transcription, protein export and oxidative phosphorylation pathways were adversely affected. An assessment of perturbed proteome after viral infection and viral miRNA expression led to the identification of 117 genes that are potential targets of 10 viral miRNAs. Using miRNA mimics, we confirmed the down regulation of 9 host genes. The results comprehensively show dynamics of host responses after viral infection.
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Affiliation(s)
- Nishtha Nayyar
- Insect Resistance Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.,Institute of Stem Cell Biology and Regenerative Medicine, National Centre for Biological Sciences, GKVK, Bellary Road, Bangalore, 560065, India
| | - Inderjeet Kaur
- Malaria Biology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Pawan Malhotra
- Malaria Biology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| | - Raj K Bhatnagar
- Insect Resistance Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
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7
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Protein composition analysis of polyhedra matrix of Bombyx mori nucleopolyhedrovirus (BmNPV) showed powerful capacity of polyhedra to encapsulate foreign proteins. Sci Rep 2017; 7:8768. [PMID: 28821766 PMCID: PMC5562830 DOI: 10.1038/s41598-017-08987-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 07/14/2017] [Indexed: 11/23/2022] Open
Abstract
Polyhedra can encapsulate other proteins and have potential applications as protein stabilizers. The extremely stable polyhedra matrix may provide a platform for future engineered micro-crystal devices. However, the protein composition of the polyhedra matrix remains largely unknown. In this study, the occlusion-derived virus (ODV)-removed BmNPV polyhedra matrix fraction was subjected to SDS-PAGE and then an LC-ESI-MS/MS analysis using a Thermo Scientific Q Exactive mass spectrometer. In total, 28 host and 91 viral proteins were identified. The host components were grouped into one of six categories, i.e., chaperones, ubiquitin and related proteins, host helicases, cytoskeleton-related proteins, RNA-binding proteins and others, according to their predicted Pfam domain(s). Most viral proteins may not be essential for polyhedra assembly, as evidenced by studies in the literature showing that polyhedra formation occurs in the nucleus upon the disruption of individual genes. The structural role of these proteins in baculovirus replication will be of significant interest in future studies. The immobilization of enhanced green fluorescent protein (eGFP) into the polyhedra by fusing with the C-terminus of BM134 that is encoded by open reading frame (ORF) 134 suggested that the polyhedra had a powerful capacity to trap foreign proteins, and BM134 was a potential carrier for incorporating proteins of interest into the polyhedra.
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8
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Diversity of large DNA viruses of invertebrates. J Invertebr Pathol 2017; 147:4-22. [DOI: 10.1016/j.jip.2016.08.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 08/03/2016] [Accepted: 08/04/2016] [Indexed: 11/17/2022]
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9
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Bézier A, Harichaux G, Musset K, Labas V, Herniou EA. Qualitative proteomic analysis of Tipula oleracea nudivirus occlusion bodies. J Gen Virol 2017; 98:284-295. [DOI: 10.1099/jgv.0.000661] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Annie Bézier
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261 CNRS Université François-Rabelais, Tours 37200, France
| | - Grégoire Harichaux
- INRA, PRC UMR85-CNRS 7247-UFR-IFCE, Laboratoire de Spectrométrie de masse, Plateforme d’Analyse Intégrative des Biomolécules et de Phénomique des Animaux d’Intérêt Bio-agronomique (PAIB2), Nouzilly 37380, France
| | - Karine Musset
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261 CNRS Université François-Rabelais, Tours 37200, France
| | - Valérie Labas
- INRA, PRC UMR85-CNRS 7247-UFR-IFCE, Laboratoire de Spectrométrie de masse, Plateforme d’Analyse Intégrative des Biomolécules et de Phénomique des Animaux d’Intérêt Bio-agronomique (PAIB2), Nouzilly 37380, France
| | - Elisabeth A Herniou
- Institut de Recherche sur la Biologie de l’Insecte (IRBI), UMR 7261 CNRS Université François-Rabelais, Tours 37200, France
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10
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Kokusho R, Koh Y, Fujimoto M, Shimada T, Katsuma S. Bombyx mori nucleopolyhedrovirus BM5 protein regulates progeny virus production and viral gene expression. Virology 2016; 498:240-249. [PMID: 27614700 DOI: 10.1016/j.virol.2016.08.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 08/27/2016] [Accepted: 08/30/2016] [Indexed: 10/21/2022]
Abstract
Bombyx mori nucleopolyhedrovirus (BmNPV) orf5 (Bm5) is a core gene of lepidopteran baculoviruses and encodes the protein with the conserved amino acid residues (DUF3627) in its C-terminus. Here, we found that Bm5 disruption resulted in lower titers of budded viruses and fewer numbers of occlusion bodies (OBs) in B. mori cultured cells and larvae, although viral genome replication was not affected. Bm5 disruption also caused aberrant expression of various viral genes at the very late stage of infection. Immunocytochemical analysis revealed that BM5 localized to the nuclear membrane. We also found that DUF3627 is important for OB production, transcriptional regulation of viral genes, and subcellular localization of BM5. Compared with wild-type BmNPV infection, larval death was delayed when B. mori larvae were infected with Bm5 mutants. These results suggest that BM5 is involved in progeny virus production and regulation of viral gene expression at the very late stage of infection.
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Affiliation(s)
- Ryuhei Kokusho
- Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan.
| | - Yoshikazu Koh
- Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Masaru Fujimoto
- Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Toru Shimada
- Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan
| | - Susumu Katsuma
- Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-Ku, Tokyo 113-8657, Japan.
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11
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Hou D, Chen X, Zhang LK. Proteomic Analysis of Mamestra Brassicae Nucleopolyhedrovirus Progeny Virions from Two Different Hosts. PLoS One 2016; 11:e0153365. [PMID: 27058368 PMCID: PMC4825930 DOI: 10.1371/journal.pone.0153365] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 03/29/2016] [Indexed: 01/31/2023] Open
Abstract
Mamestra brassicae nucleopolyhedrovirus (MabrNPV) has a wide host range replication in more than one insect species. In this study, a sequenced MabrNPV strain, MabrNPV-CTa, was used to perform proteomic analysis of both BVs and ODVs derived from two infected hosts: Helicoverpa armigera and Spodoptera exigua. A total of 82 and 39 viral proteins were identified in ODVs and BVs, respectively. And totally, 23 and 76 host proteins were identified as virion-associated with ODVs and BVs, respectively. The host proteins incorporated into the virus particles were mainly involved in cytoskeleton, signaling, vesicle trafficking, chaperone and metabolic systems. Some host proteins, such as actin, cyclophilin A and heat shock protein 70 would be important for viral replication. Several host proteins involved in immune response were also identified in BV, and a C-type lectin protein was firstly found to be associated with BV and its family members have been demonstrated to be involved in entry process of other viruses. This study facilitated the annotation of baculovirus genome, and would help us to understand baculovirus virion structure. Furthermore, the identification of host proteins associated with virions produced in vivo would facilitate investigations on the involvement of intriguing host proteins in virus replication.
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Affiliation(s)
- Dianhai Hou
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Xi Chen
- Wuhan Institute of Biotechnology, Wuhan, P. R. China
| | - Lei-Ke Zhang
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
- * E-mail:
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12
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Brito AFD, Braconi CT, Weidmann M, Dilcher M, Alves JMP, Gruber A, Zanotto PMDA. The Pangenome of the Anticarsia gemmatalis Multiple Nucleopolyhedrovirus (AgMNPV). Genome Biol Evol 2015; 8:94-108. [PMID: 26615220 PMCID: PMC4758234 DOI: 10.1093/gbe/evv231] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The alphabaculovirus Anticarsia gemmatalis multiple nucleopolyhedrovirus (AgMNPV) is the world's most successful viral bioinsecticide. Through the 1980s and 1990s, this virus was extensively used for biological control of populations of Anticarsia gemmatalis (Velvetbean caterpillar) in soybean crops. During this period, genetic studies identified several variable loci in the AgMNPV; however, most of them were not characterized at the sequence level. In this study we report a full genome comparison among 17 wild-type isolates of AgMNPV. We found the pangenome of this virus to contain at least 167 hypothetical genes, 151 of which are shared by all genomes. The gene bro-a that might be involved in host specificity and carrying transporter is absent in some genomes, and new hypothetical genes were observed. Among these genes there is a unique rnf12-like gene, probably implicated in ubiquitination. Events of gene fission and fusion are common, as four genes have been observed as single or split open reading frames. Gains and losses of genomic fragments (from 20 to 900 bp) are observed within tandem repeats, such as in eight direct repeats and four homologous regions. Most AgMNPV genes present low nucleotide diversity, and variable genes are mainly located in a locus known to evolve through homologous recombination. The evolution of AgMNPV is mainly driven by small indels, substitutions, gain and loss of nucleotide stretches or entire coding sequences. These variations may cause relevant phenotypic alterations, which probably affect the infectivity of AgMNPV. This work provides novel information on genomic evolution of the AgMNPV in particular and of baculoviruses in general.
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Affiliation(s)
- Anderson Fernandes de Brito
- Department of Microbiology, Institute of Biomedical Sciences-ICB II, Laboratory of Molecular Evolution and Bioinformatics, University of São Paulo-USP, São Paulo, SP, Brazil
| | - Carla Torres Braconi
- Department of Microbiology, Institute of Biomedical Sciences-ICB II, Laboratory of Molecular Evolution and Bioinformatics, University of São Paulo-USP, São Paulo, SP, Brazil
| | - Manfred Weidmann
- Department of Virology, University Medical Center, Göttingen, Germany
| | - Meik Dilcher
- Department of Virology, University Medical Center, Göttingen, Germany
| | - João Marcelo Pereira Alves
- Department of Parasitology, Institute of Biomedical Sciences-ICB II, University of São Paulo-USP, São Paulo, SP, Brazil
| | - Arthur Gruber
- Department of Parasitology, Institute of Biomedical Sciences-ICB II, University of São Paulo-USP, São Paulo, SP, Brazil
| | - Paolo Marinho de Andrade Zanotto
- Department of Microbiology, Institute of Biomedical Sciences-ICB II, Laboratory of Molecular Evolution and Bioinformatics, University of São Paulo-USP, São Paulo, SP, Brazil
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13
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Abstract
Viruses rely on widespread genetic variation and large population size for adaptation. Large DNA virus populations are thought to harbor little variation though natural populations may be polymorphic. To measure the genetic variation present in a dsDNA virus population, we deep sequenced a natural strain of the baculovirus Autographa californica multiple nucleopolyhedrovirus. With 124,221X average genome coverage of our 133,926 bp long consensus, we could detect low frequency mutations (0.025%). K-means clustering was used to classify the mutations in four categories according to their frequency in the population. We found 60 high frequency non-synonymous mutations under balancing selection distributed in all functional classes. These mutants could alter viral adaptation dynamics, either through competitive or synergistic processes. Lastly, we developed a technique for the delimitation of large deletions in next generation sequencing data. We found that large deletions occur along the entire viral genome, with hotspots located in homologous repeat regions (hrs). Present in 25.4% of the genomes, these deletion mutants presumably require functional complementation to complete their infection cycle. They might thus have a large impact on the fitness of the baculovirus population. Altogether, we found a wide breadth of genomic variation in the baculovirus population, suggesting it has high adaptive potential.
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14
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Zhang X, Liang Z, Yin X, Shao X. Proteomic analysis of the occlusion-derived virus of Clostera anachoreta granulovirus. J Gen Virol 2015; 96:2394-2404. [PMID: 25872743 DOI: 10.1099/vir.0.000146] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
To date, proteomic studies have been performed on occlusion-derived viruses (ODVs) from five members of the family Baculoviridae, genus Alphabaculovirus, but only a single member of the genus Betabaculovirus (Pieris rapae granulovirus). In this study, LC-MS/MS was used to analyse the ODV proteins of Clostera anachoreta granulovirus (ClanGV), another member of the genus Betabaculovirus. The results indicated that 73 proteins, including the products of 27 baculovirus core genes, were present in ClanGV ODVs. This is the largest number of ODV proteins identified in baculoviruses to date. To the best of our knowledge, 24 of these proteins were newly identified as ODV-associated proteins. Twelve of the proteins were shared by all seven of the other baculoviruses that have been analysed by proteomic techniques, including P49, PIF-2, ODV-EC43, P74, P6.9, P33, VP39, ODV-EC27, VP91, GP41, VLF-1 and VP1054. ClanGV shared between 20 and 36 ODV proteins with each of the other six baculoviruses that have been analysed by proteomics. Ten proteins were identified only as ODV components of ClanGV and PrGV: Clan22, Clan27, Clan69, Clan83, Clan84, Clan90, Clan116, Clan94, FGF-3 and ME53, the first seven of which were encoded by betabaculovirus-specific genes. These findings may provide novel insights into baculovirus structure as well as reveal similarities and differences between alphabaculoviruses and betabaculoviruses.
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Affiliation(s)
- Xiaoxia Zhang
- College of Life Sciences, Henan Agricultural University, 63 Nongye Road, Zhengzhou 450002, PR China
| | - Zhenpu Liang
- College of Life Sciences, Henan Agricultural University, 63 Nongye Road, Zhengzhou 450002, PR China
| | - Xinming Yin
- College of Plant Protection, Henan Agricultural University, 63 Nongye Road, Zhengzhou 450002, PR China
| | - Xinfeng Shao
- College of Life Sciences, Henan Agricultural University, 63 Nongye Road, Zhengzhou 450002, PR China
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15
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Kokusho R, Kawamoto M, Koyano Y, Sugano S, Suzuki Y, Shimada T, Katsuma S. Bombyx mori nucleopolyhedrovirus actin rearrangement-inducing factor 1 enhances systemic infection in B. mori larvae. J Gen Virol 2015; 96:1938-46. [PMID: 25809914 DOI: 10.1099/vir.0.000130] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The actin rearrangement-inducing factor 1 (arif-1) gene is a baculoviral early gene conserved in most alphabaculoviruses. Previous studies reported that Autographa californica nucleopolyhedrovirus ARIF-1 protein induces filamentous actin concentration on the plasma membrane during the early stage of infection in Trichoplusia ni TN-368 cells, but its role in larval infection remains unknown. In this study, we performed behavioural screening using Bombyx mori larvae infected with Bombyx mori nucleopolyhedrovirus (BmNPV) mutants and found that larvae infected with arif-1-mutated BmNPVs did not show locomotor hyperactivity that was normally observed in BmNPV-infected larvae. arif-1-deficient BmNPVs also showed reduced pathogenicity and total viral propagation in B. mori larvae, whereas viral propagation of arif-1-deficient viruses was comparable with that of control viruses in B. mori cultured cells. An arif-1-defective BmNPV expressing the GFP gene (gfp) was used to monitor the progression of infection in B. mori larvae. GFP expression and quantitative reverse transcription-PCR analyses revealed that infection by the arif-1-disrupted virus was significantly delayed in trachea, fat body, suboesophageal ganglion and brain. These results indicated that BmNPV ARIF-1 enhanced systemic infection in B. mori larvae.
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Affiliation(s)
- Ryuhei Kokusho
- 1Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Munetaka Kawamoto
- 1Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yasue Koyano
- 1Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Sumio Sugano
- 2Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Yutaka Suzuki
- 3Department of Computational Biology, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-0882, Japan
| | - Toru Shimada
- 1Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Susumu Katsuma
- 1Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Egress of budded virions of Autographa californica nucleopolyhedrovirus does not require activity of Spodoptera frugiperda HSP/HSC70 chaperones. Virus Res 2014; 192:1-5. [DOI: 10.1016/j.virusres.2014.08.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 08/04/2014] [Accepted: 08/05/2014] [Indexed: 11/17/2022]
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17
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Complete genome sequence of the first non-Asian isolate of Bombyx mori nucleopolyhedrovirus. Virus Genes 2014; 49:477-84. [PMID: 25212430 DOI: 10.1007/s11262-014-1112-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 08/27/2014] [Indexed: 10/24/2022]
Abstract
Brazil is one of the largest silk producers in the world. The domesticated silkworm (Bombyx mori) was formally introduced into the country in the twentieth century, and the state of Paraná is the main national producer. During larval stages, B. mori can be afflicted by many different infectious diseases, which lead to substantial losses in silk production. In this work, we describe the structure and complete genome sequence of the first non-Asian isolate of Bombyx mori nucleopolyhedrovirus (BmNPV), the most important silkworm pathogen. The BmNPV-Brazilian isolate is a nucleopolyhedrovirus with singly enveloped nucleocapsids within polyhedral occlusion bodies. Its genome has 126,861 bp with a G + C content of 40.4 %. Phylogenetic analysis clustered the virus with the Japanese strain (BmNPV-T3). As expected, we have detected intra-population variability in the virus sample. Variation along homologous regions (HRs) and bro genes was observed; there were seven HRs, deletion of bro-e, and division of bro-a into two ORFs. The study of baculoviruses allows for a better understanding of virus evolution providing insight for biological control of insect pests or protection against the pernicious disease caused by these viruses.
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