1
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Sjodin AR, Willig MR, Rodríguez‐Durán A, Anthony SJ. Rapid taxonomic categorization of short, abundant virus sequences for ecological analyses. Ecol Evol 2024; 14:e11501. [PMID: 38895563 PMCID: PMC11183940 DOI: 10.1002/ece3.11501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 05/10/2024] [Accepted: 05/16/2024] [Indexed: 06/21/2024] Open
Abstract
Public health concerns about recent viral epidemics have motivated researchers to seek novel ways to understand pathogen infection in native, wildlife hosts. With its deep history of tools and perspectives for understanding the abundance and distribution of organisms, ecology can shed new light on viral infection dynamics. However, datasets allowing deep explorations of viral communities from an ecological perspective are lacking. We sampled 1086 bats from two, adjacent Puerto Rican caves and tested them for infection by herpesviruses, resulting in 3131 short, viral sequences. Using percent identity of nucleotides and a machine learning algorithm (affinity propagation), we categorized herpesviruses into 43 operational taxonomic units (OTUs) to be used in place of species in subsequent ecological analyses. Herpesvirus metacommunities demonstrated long-tailed rank frequency distributions at all analyzed levels of host organization (i.e., individual, population, and community). Although 13 herpesvirus OTUs were detected in more than one host species, OTUs generally exhibited host specificity by infecting a single core host species at a significantly higher prevalence than in all satellite species combined. We describe the natural history of herpesvirus metacommunities in Puerto Rican bats and suggest that viruses follow the general law that communities comprise few common and many rare species. To guide future efforts in the field of viral ecology, hypotheses are presented regarding mechanisms that contribute to these patterns.
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Affiliation(s)
- Anna R. Sjodin
- Department of Ecology & Evolutionary BiologyUniversity of ConnecticutStorrsConnecticutUSA
| | - Michael R. Willig
- Department of Ecology & Evolutionary BiologyUniversity of ConnecticutStorrsConnecticutUSA
- Center for Environmental Sciences & Engineering and Institute of the EnvironmentUniversity of ConnecticutStorrsConnecticutUSA
| | | | - Simon J. Anthony
- Center for Infection and ImmunityColumbia UniversityNew YorkNew YorkUSA
- Department of Pathology, Microbiology, and ImmunologyUC Davis School of Veterinary MedicineDavisCaliforniaUSA
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2
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Lauber C, Zhang X, Vaas J, Klingler F, Mutz P, Dubin A, Pietschmann T, Roth O, Neuman BW, Gorbalenya AE, Bartenschlager R, Seitz S. Deep mining of the Sequence Read Archive reveals major genetic innovations in coronaviruses and other nidoviruses of aquatic vertebrates. PLoS Pathog 2024; 20:e1012163. [PMID: 38648214 PMCID: PMC11065284 DOI: 10.1371/journal.ppat.1012163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 05/02/2024] [Accepted: 03/31/2024] [Indexed: 04/25/2024] Open
Abstract
Virus discovery by genomics and metagenomics empowered studies of viromes, facilitated characterization of pathogen epidemiology, and redefined our understanding of the natural genetic diversity of viruses with profound functional and structural implications. Here we employed a data-driven virus discovery approach that directly queries unprocessed sequencing data in a highly parallelized way and involves a targeted viral genome assembly strategy in a wide range of sequence similarity. By screening more than 269,000 datasets of numerous authors from the Sequence Read Archive and using two metrics that quantitatively assess assembly quality, we discovered 40 nidoviruses from six virus families whose members infect vertebrate hosts. They form 13 and 32 putative viral subfamilies and genera, respectively, and include 11 coronaviruses with bisegmented genomes from fishes and amphibians, a giant 36.1 kilobase coronavirus genome with a duplicated spike glycoprotein (S) gene, 11 tobaniviruses and 17 additional corona-, arteri-, cremega-, nanhypo- and nangoshaviruses. Genome segmentation emerged in a single evolutionary event in the monophyletic lineage encompassing the subfamily Pitovirinae. We recovered the bisegmented genome sequences of two coronaviruses from RNA samples of 69 infected fishes and validated the presence of poly(A) tails at both segments using 3'RACE PCR and subsequent Sanger sequencing. We report a genetic linkage between accessory and structural proteins whose phylogenetic relationships and evolutionary distances are incongruent with the phylogeny of replicase proteins. We rationalize these observations in a model of inter-family S recombination involving at least five ancestral corona- and tobaniviruses of aquatic hosts. In support of this model, we describe an individual fish co-infected with members from the families Coronaviridae and Tobaniviridae. Our results expand the scale of the known extraordinary evolutionary plasticity in nidoviral genome architecture and call for revisiting fundamentals of genome expression, virus particle biology, host range and ecology of vertebrate nidoviruses.
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Affiliation(s)
- Chris Lauber
- Institute for Experimental Virology, TWINCORE Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
- Cluster of Excellence 2155 RESIST, Hannover, Germany
| | - Xiaoyu Zhang
- Institute for Experimental Virology, TWINCORE Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Josef Vaas
- Division of Virus-Associated Carcinogenesis (F170), German Cancer Research Center (DKFZ), Heidelberg, Germany
- Heidelberg University, Medical Faculty Heidelberg, Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Franziska Klingler
- Division of Virus-Associated Carcinogenesis (F170), German Cancer Research Center (DKFZ), Heidelberg, Germany
- Heidelberg University, Medical Faculty Heidelberg, Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Pascal Mutz
- Division of Virus-Associated Carcinogenesis (F170), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Arseny Dubin
- Marine Evolutionary Biology, Zoological Institute, Kiel University, Kiel, Germany
| | - Thomas Pietschmann
- Institute for Experimental Virology, TWINCORE Centre for Experimental and Clinical Infection Research, a joint venture between the Hannover Medical School (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
- Cluster of Excellence 2155 RESIST, Hannover, Germany
| | - Olivia Roth
- Marine Evolutionary Biology, Zoological Institute, Kiel University, Kiel, Germany
| | - Benjamin W. Neuman
- Department of Biology and Texas A&M Global Health Research Complex, Texas A&M University, College Station, Texas, United States
| | - Alexander E. Gorbalenya
- Leiden University Center of Infectious Diseases, Leiden University Medical Center, Leiden, The Netherlands
- Faculty of Bioengineering and Bioinformatics and Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Ralf Bartenschlager
- Division of Virus-Associated Carcinogenesis (F170), German Cancer Research Center (DKFZ), Heidelberg, Germany
- Heidelberg University, Medical Faculty Heidelberg, Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research, Heidelberg, Germany
| | - Stefan Seitz
- Division of Virus-Associated Carcinogenesis (F170), German Cancer Research Center (DKFZ), Heidelberg, Germany
- Heidelberg University, Medical Faculty Heidelberg, Department of Infectious Diseases, Molecular Virology, Center for Integrative Infectious Disease Research, Heidelberg, Germany
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3
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Kamminga S, Sidorov IA, Tadesse M, van der Meijden E, de Brouwer C, Zaaijer HL, Feltkamp MC, Gorbalenya AE. Translating genomic exploration of the family Polyomaviridae into confident human polyomavirus detection. iScience 2022; 25:103613. [PMID: 35036862 PMCID: PMC8749223 DOI: 10.1016/j.isci.2021.103613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 08/27/2021] [Accepted: 12/09/2021] [Indexed: 12/26/2022] Open
Abstract
The Polyomaviridae is a family of ubiquitous dsDNA viruses that establish persistent infection early in life. Screening for human polyomaviruses (HPyVs), which comprise 14 diverse species, relies upon species-specific qPCRs whose validity may be challenged by accelerating genomic exploration of the virosphere. Using this reasoning, we tested 64 published HPyV qPCR assays in silico against the 1781 PyV genome sequences that were divided in targets and nontargets, based on anticipated species specificity of each qPCR. We identified several cases of problematic qPCR performance that were confirmed in vitro and corrected through using degenerate oligos. Furthermore, our study ranked 8 out of 52 tested BKPyV qPCRs as remaining of consistently high quality in the wake of recent PyV discoveries and showed how sensitivity of most other qPCRs could be rescued by annealing temperature adjustment. This study establishes an efficient framework for ensuring confidence in available HPyV qPCRs in the genomic era.
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Affiliation(s)
- Sergio Kamminga
- Department of Medical Microbiology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
- Department of Blood-borne Infections, Sanquin Research, 1066 CX Amsterdam, the Netherlands
| | - Igor A. Sidorov
- Department of Medical Microbiology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Michaël Tadesse
- Department of Medical Microbiology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Els van der Meijden
- Department of Medical Microbiology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Caroline de Brouwer
- Department of Medical Microbiology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Hans L. Zaaijer
- Department of Blood-borne Infections, Sanquin Research, 1066 CX Amsterdam, the Netherlands
| | - Mariet C.W. Feltkamp
- Department of Medical Microbiology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Alexander E. Gorbalenya
- Department of Medical Microbiology, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119991 Moscow, Russia
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4
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Nikolaidis M, Markoulatos P, Van de Peer Y, Oliver SG, Amoutzias GD. The Neighborhood of the Spike Gene Is a Hotspot for Modular Intertypic Homologous and Nonhomologous Recombination in Coronavirus Genomes. Mol Biol Evol 2022; 39:msab292. [PMID: 34638137 PMCID: PMC8549283 DOI: 10.1093/molbev/msab292] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Coronaviruses (CoVs) have very large RNA viral genomes with a distinct genomic architecture of core and accessory open reading frames (ORFs). It is of utmost importance to understand their patterns and limits of homologous and nonhomologous recombination, because such events may affect the emergence of novel CoV strains, alter their host range, infection rate, tissue tropism pathogenicity, and their ability to escape vaccination programs. Intratypic recombination among closely related CoVs of the same subgenus has often been reported; however, the patterns and limits of genomic exchange between more distantly related CoV lineages (intertypic recombination) need further investigation. Here, we report computational/evolutionary analyses that clearly demonstrate a substantial ability for CoVs of different subgenera to recombine. Furthermore, we show that CoVs can obtain-through nonhomologous recombination-accessory ORFs from core ORFs, exchange accessory ORFs with different CoV genera, with other viruses (i.e., toroviruses, influenza C/D, reoviruses, rotaviruses, astroviruses) and even with hosts. Intriguingly, most of these radical events result from double crossovers surrounding the Spike ORF, thus highlighting both the instability and mobile nature of this genomic region. Although many such events have often occurred during the evolution of various CoVs, the genomic architecture of the relatively young SARS-CoV/SARS-CoV-2 lineage so far appears to be stable.
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Affiliation(s)
- Marios Nikolaidis
- Bioinformatics Laboratory, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | - Panayotis Markoulatos
- Microbial Biotechnology-Molecular Bacteriology-Virology Laboratory, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
| | - Yves Van de Peer
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
- College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Stephen G Oliver
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Grigorios D Amoutzias
- Bioinformatics Laboratory, Department of Biochemistry and Biotechnology, University of Thessaly, Larissa, Greece
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5
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Amoutzias GD, Nikolaidis M, Tryfonopoulou E, Chlichlia K, Markoulatos P, Oliver SG. The Remarkable Evolutionary Plasticity of Coronaviruses by Mutation and Recombination: Insights for the COVID-19 Pandemic and the Future Evolutionary Paths of SARS-CoV-2. Viruses 2022; 14:78. [PMID: 35062282 PMCID: PMC8778387 DOI: 10.3390/v14010078] [Citation(s) in RCA: 54] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/22/2021] [Accepted: 12/31/2021] [Indexed: 12/13/2022] Open
Abstract
Coronaviruses (CoVs) constitute a large and diverse subfamily of positive-sense single-stranded RNA viruses. They are found in many mammals and birds and have great importance for the health of humans and farm animals. The current SARS-CoV-2 pandemic, as well as many previous epidemics in humans that were of zoonotic origin, highlights the importance of studying the evolution of the entire CoV subfamily in order to understand how novel strains emerge and which molecular processes affect their adaptation, transmissibility, host/tissue tropism, and patho non-homologous genicity. In this review, we focus on studies over the last two years that reveal the impact of point mutations, insertions/deletions, and intratypic/intertypic homologous and non-homologous recombination events on the evolution of CoVs. We discuss whether the next generations of CoV vaccines should be directed against other CoV proteins in addition to or instead of spike. Based on the observed patterns of molecular evolution for the entire subfamily, we discuss five scenarios for the future evolutionary path of SARS-CoV-2 and the COVID-19 pandemic. Finally, within this evolutionary context, we discuss the recently emerged Omicron (B.1.1.529) VoC.
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Affiliation(s)
- Grigorios D. Amoutzias
- Bioinformatics Laboratory, Department of Biochemistry and Biotechnology, University of Thessaly, 41500 Larissa, Greece;
| | - Marios Nikolaidis
- Bioinformatics Laboratory, Department of Biochemistry and Biotechnology, University of Thessaly, 41500 Larissa, Greece;
| | - Eleni Tryfonopoulou
- Laboratory of Molecular Immunology, Department of Molecular Biology and Genetics, Democritus University of Thrace, University Campus-Dragana, 68100 Alexandroupolis, Greece; (E.T.); (K.C.)
| | - Katerina Chlichlia
- Laboratory of Molecular Immunology, Department of Molecular Biology and Genetics, Democritus University of Thrace, University Campus-Dragana, 68100 Alexandroupolis, Greece; (E.T.); (K.C.)
| | - Panayotis Markoulatos
- Microbial Biotechnology-Molecular Bacteriology-Virology Laboratory, Department of Biochemistry and Biotechnology, University of Thessaly, 41500 Larissa, Greece;
| | - Stephen G. Oliver
- Department of Biochemistry, University of Cambridge, Sanger Building, 80 Tennis Court Road, Cambridge CB2 1GA, UK
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6
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Gorbalenya AE, Lauber C. Bioinformatics of virus taxonomy: foundations and tools for developing sequence-based hierarchical classification. Curr Opin Virol 2021; 52:48-56. [PMID: 34883443 DOI: 10.1016/j.coviro.2021.11.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/22/2021] [Accepted: 11/04/2021] [Indexed: 11/03/2022]
Abstract
The genome sequence is the only characteristic readily obtainable for all known viruses, underlying the growing role of comparative genomics in organizing knowledge about viruses in a systematic evolution-aware way, known as virus taxonomy. Overseen by the International Committee on Taxonomy of Viruses (ICTV), development of virus taxonomy involves taxa demarcation at 15 ranks of a hierarchical classification, often in host-specific manner. Outside the ICTV remit, researchers assess fitting numerous unclassified viruses into the established taxa. They employ different metrics of virus clustering, basing on conserved domain(s), separation of viruses in rooted phylogenetic trees and pair-wise distance space. Computational approaches differ further in respect to methodology, number of ranks considered, sensitivity to uneven virus sampling, and visualization of results. Advancing and using computational tools will be critical for improving taxa demarcation across the virosphere and resolving rank origins in research that may also inform experimental virology.
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Affiliation(s)
- Alexander E Gorbalenya
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands; Faculty of Bioengineering and Bioinformatics and Belozersky, Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899, Moscow, Russia.
| | - Chris Lauber
- Institute for Experimental Virology, TWINCORE Centre for Experimental and Clinical Infection Research, A Joint Venture between the Hannover Medical School (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
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7
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A k-mer based approach for classifying viruses without taxonomy identifies viral associations in human autism and plant microbiomes. Comput Struct Biotechnol J 2021; 19:5911-5919. [PMID: 34849195 PMCID: PMC8605058 DOI: 10.1016/j.csbj.2021.10.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 10/17/2021] [Accepted: 10/20/2021] [Indexed: 12/25/2022] Open
Abstract
Viruses are an underrepresented taxa in the study and identification of microbiome constituents; however, they play an essential role in health, microbiome regulation, and transfer of genetic material. Only a few thousand viruses have been isolated, sequenced, and assigned a taxonomy, which limits the ability to identify and quantify viruses in the microbiome. Additionally, the vast diversity of viruses represents a challenge for classification, not only in constructing a viral taxonomy, but also in identifying similarities between a virus' genotype and its phenotype. However, the diversity of viral sequences can be leveraged to classify their sequences in metagenomic and metatranscriptomic samples, even if they do not have a taxonomy. To identify and quantify viruses in transcriptomic and genomic samples, we developed a dynamic programming algorithm for creating a classification tree out of 715,672 metagenome viruses. To create the classification tree, we clustered proportional similarity scores generated from the k-mer profiles of each of the metagenome viruses to create a database of metagenomic viruses. The resulting Kraken2 database of the metagenomic viruses can be found here: https://www.osti.gov/biblio/1615774 and is compatible with Kraken2. We then integrated the viral classification database with databases created with genomes from NCBI for use with ParaKraken (a parallelized version of Kraken provided in Supplemental Zip 1), a metagenomic/transcriptomic classifier. To illustrate the breadth of our utility for classifying metagenome viruses, we analyzed data from a plant metagenome study identifying genotypic and compartment specific differences between two Populus genotypes in three different compartments. We also identified a significant increase in abundance of eight viral sequences in post mortem brains in a human metatranscriptome study comparing Autism Spectrum Disorder patients and controls. We also show the potential accuracy for classifying viruses by utilizing both the JGI and NCBI viral databases to identify the uniqueness of viral sequences. Finally, we validate the accuracy of viral classification with NCBI databases containing viruses with taxonomy to identify pathogenic viruses in known COVID-19 and cassava brown streak virus infection samples. Our method represents the compulsory first step in better understanding the role of viruses in the microbiome by allowing for a more complete identification of sequences without taxonomy. Better classification of viruses will improve identifying associations between viruses and their hosts as well as viruses and other microbiome members. Despite the lack of taxonomy, this database of metagenomic viruses can be used with any tool that utilizes a taxonomy, such as Kraken, for accurate classification of viruses.
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8
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Hierweger MM, Koch MC, Rupp M, Maes P, Di Paola N, Bruggmann R, Kuhn JH, Schmidt-Posthaus H, Seuberlich T. Novel Filoviruses, Hantavirus, and Rhabdovirus in Freshwater Fish, Switzerland, 2017. Emerg Infect Dis 2021; 27:3082-3091. [PMID: 34808081 PMCID: PMC8632185 DOI: 10.3201/eid2712.210491] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
European perch (Perca fluviatilis) are increasingly farmed as a human food source. Viral infections of European perch remain largely unexplored, thereby putting farm populations at incalculable risk for devastating fish epizootics and presenting a potential hazard to consumers. To address these concerns, we applied metatranscriptomics to identify disease-associated viruses in European perch farmed in Switzerland. Unexpectedly, in clinically diseased fish we detected novel freshwater fish filoviruses, a novel freshwater fish hantavirus, and a previously unknown rhabdovirus. Hantavirus titers were high, and we demonstrated virus in macrophages and gill endothelial cells by using in situ hybridization. Rhabdovirus titers in organ samples were low, but virus could be isolated on cell culture. Our data add to the hypothesis that filoviruses, hantaviruses, and rhabdoviruses are globally distributed common fish commensals, pathogens, or both. Our findings shed new light on negative-sense RNA virus diversity and evolution.
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9
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Dutilh BE, Varsani A, Tong Y, Simmonds P, Sabanadzovic S, Rubino L, Roux S, Muñoz AR, Lood C, Lefkowitz EJ, Kuhn JH, Krupovic M, Edwards RA, Brister JR, Adriaenssens EM, Sullivan MB. Perspective on taxonomic classification of uncultivated viruses. Curr Opin Virol 2021; 51:207-215. [PMID: 34781105 DOI: 10.1016/j.coviro.2021.10.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 12/19/2022]
Abstract
Historically, virus taxonomy has been limited to describing viruses that were readily cultivated in the laboratory or emerging in natural biomes. Metagenomic analyses, single-particle sequencing, and database mining efforts have yielded new sequence data on an astounding number of previously unknown viruses. As metagenomes are relatively free of biases, these data provide an unprecedented insight into the vastness of the virosphere, but to properly value the extent of this diversity it is critical that the viruses are taxonomically classified. Inclusion of uncultivated viruses has already improved the process as well as the understanding of the taxa, viruses, and their evolutionary relationships. The continuous development and testing of computational tools will be required to maintain a dynamic virus taxonomy that can accommodate the new discoveries.
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Affiliation(s)
- Bas E Dutilh
- Theoretical Biology and Bioinformatics, Science for Life, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands; Institute of Bioloversity, Faculty of Biological Sciences, Cluster of Excellence Balance of the Microverse, Friedrich-Schiller-University Jena, 07743, Jena, Germany.
| | - Arvind Varsani
- The Biodesign Center of Fundamental and Applied Microbiomics, School of Life Sciences, Center for Evolution and Medicine, Arizona State University, Tempe, AZ 85287, USA; Structural Biology Research Unit, Department of Integrative Biomedical Sciences, University of Cape Town, 7925, Cape Town, South Africa
| | - Yigang Tong
- Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Peter Simmonds
- Nuffield Department of Medicine, University of Oxford, Peter Medawar Building, South Parks Road, Oxford, OX1 3SY, UK
| | - Sead Sabanadzovic
- Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, MS 39762, USA
| | - Luisa Rubino
- Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle Ricerche, Bari, Italy
| | - Simon Roux
- DOE Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Alejandro Reyes Muñoz
- Max Planck Tandem Group in Computational Biology, Department of Biological Sciences, Universidad de los Andes, Bogotá, Colombia
| | - Cédric Lood
- Department of Microbial and Molecular Systems, KU Leuven, Kasteelpark Arenberg 23, 3001, Leuven, Belgium; Department of Biosystems, KU Leuven, Willem de Croylaan 42, 3001, Leuven, Belgium
| | - Elliot J Lefkowitz
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Jens H Kuhn
- Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Fort Detrick, Frederick, MD 21702, USA
| | - Mart Krupovic
- Institut Pasteur, Université de Paris, Archaeal Virology Unit, F-75015, Paris, France
| | - Robert A Edwards
- College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia
| | - J Rodney Brister
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda MD 20894, USA
| | | | - Matthew B Sullivan
- Departments of Microbiology and Civil, Environmental, and Geodetic Engineering, Ohio State University, Columbus, OH, USA
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10
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Mahapatra A, Mukherjee J. Taxonomy classification using genomic footprint of mitochondrial sequences. Comb Chem High Throughput Screen 2021; 25:401-413. [PMID: 34382517 DOI: 10.2174/1386207324666210811102109] [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: 12/31/2020] [Revised: 07/07/2021] [Accepted: 07/12/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Advancement in the sequencing technology yields a huge number of genomes of a multitude of organisms in our planet. One of the fundamental tasks for processing and analyzing these sequences is to organize them in the existing taxonomic orders. <P> Method: Recently we proposed a novel approach, GenFooT, of taxonomy classification using the concept of genomic footprint (GFP). The technique is further refined and enhanced in this work leading to improved accuracies in the task of taxonomic classification on various benchmark datasets. GenFooT maps a genome sequence in a 2D coordinate space and extracts features from that representation. It uses two hyper-parameters, namely block size and number of fragments of genomic sequence while computing the feature. In this work, we propose an analysis for choosing values of those parameters adaptively from the sequences. The enhanced version of GenFooT is named GenFooT2. <P> Results and Conclusion: We have experimented GenFooT2 on ten different biological datasets of genomic sequences of various organisms belonging to different taxonomy ranks. Our experimental results indicate more than 3% improved classification performance of the proposed features with Logistic regression classifier than the GenFooT. We also performed the statistical test to compare the performance of GenFooT2 with the state-of-the-art methods including our previous method GenFooT. The experimental results as well as the statistical test exhibit that the performance of the proposed GenFooT2 is significantly better.
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Affiliation(s)
- Aritra Mahapatra
- Department of Computer Science and Engineering, Indian Institute of Technology Kharagpur. India
| | - Jayanta Mukherjee
- Department of Computer Science and Engineering, Indian Institute of Technology Kharagpur. India
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11
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Jungreis I, Sealfon R, Kellis M. SARS-CoV-2 gene content and COVID-19 mutation impact by comparing 44 Sarbecovirus genomes. Nat Commun 2021; 12:2642. [PMID: 33976134 PMCID: PMC8113528 DOI: 10.1038/s41467-021-22905-7] [Citation(s) in RCA: 110] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 03/28/2021] [Indexed: 02/03/2023] Open
Abstract
Despite its clinical importance, the SARS-CoV-2 gene set remains unresolved, hindering dissection of COVID-19 biology. We use comparative genomics to provide a high-confidence protein-coding gene set, characterize evolutionary constraint, and prioritize functional mutations. We select 44 Sarbecovirus genomes at ideally-suited evolutionary distances, and quantify protein-coding evolutionary signatures and overlapping constraint. We find strong protein-coding signatures for ORFs 3a, 6, 7a, 7b, 8, 9b, and a novel alternate-frame gene, ORF3c, whereas ORFs 2b, 3d/3d-2, 3b, 9c, and 10 lack protein-coding signatures or convincing experimental evidence of protein-coding function. Furthermore, we show no other conserved protein-coding genes remain to be discovered. Mutation analysis suggests ORF8 contributes to within-individual fitness but not person-to-person transmission. Cross-strain and within-strain evolutionary pressures agree, except for fewer-than-expected within-strain mutations in nsp3 and S1, and more-than-expected in nucleocapsid, which shows a cluster of mutations in a predicted B-cell epitope, suggesting immune-avoidance selection. Evolutionary histories of residues disrupted by spike-protein substitutions D614G, N501Y, E484K, and K417N/T provide clues about their biology, and we catalog likely-functional co-inherited mutations. Previously reported RNA-modification sites show no enrichment for conservation. Here we report a high-confidence gene set and evolutionary-history annotations providing valuable resources and insights on SARS-CoV-2 biology, mutations, and evolution.
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Affiliation(s)
- Irwin Jungreis
- MIT Computer Science and Artificial Intelligence Laboratory, Cambridge, MA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
| | - Rachel Sealfon
- Center for Computational Biology, Flatiron Institute, Simons Foundation, New York, NY, USA
| | - Manolis Kellis
- MIT Computer Science and Artificial Intelligence Laboratory, Cambridge, MA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
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12
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Abstract
Species taxa are the units of taxonomy most suited to measure virus diversity, and they account for more than 70% of all virus taxa. Yet, as evidenced by the content of GenBank entries and illustrated by the recent literature on SARS-CoV-2, they are the most neglected taxa of virus research. To correct this disparity, we propose to make species taxa a first choice for communicating virus taxonomy in publications concerning viruses. We see it as a key step toward promoting research on diverse viruses, including pathogens, at this fundamental level of biology.
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Affiliation(s)
- Alexander E Gorbalenya
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, the Netherlands.,Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, Russia
| | - Stuart G Siddell
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, United Kingdom
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13
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Coronavirus replication-transcription complex: Vital and selective NMPylation of a conserved site in nsp9 by the NiRAN-RdRp subunit. Proc Natl Acad Sci U S A 2021; 118:2022310118. [PMID: 33472860 PMCID: PMC8017715 DOI: 10.1073/pnas.2022310118] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
RNA-dependent RNA polymerases (RdRps) of the Nidovirales (Coronaviridae, Arteriviridae, and 12 other families) are linked to an amino-terminal (N-terminal) domain, called NiRAN, in a nonstructural protein (nsp) that is released from polyprotein 1ab by the viral main protease (Mpro). Previously, self-GMPylation/UMPylation activities were reported for an arterivirus NiRAN-RdRp nsp and suggested to generate a transient state primed for transferring nucleoside monophosphate (NMP) to (currently unknown) viral and/or cellular biopolymers. Here, we show that the coronavirus (human coronavirus [HCoV]-229E and severe acute respiratory syndrome coronavirus 2) nsp12 (NiRAN-RdRp) has Mn2+-dependent NMPylation activity that catalyzes the transfer of a single NMP to the cognate nsp9 by forming a phosphoramidate bond with the primary amine at the nsp9 N terminus (N3825) following Mpro-mediated proteolytic release of nsp9 from N-terminally flanking nsps. Uridine triphosphate was the preferred nucleotide in this reaction, but also adenosine triphosphate, guanosine triphosphate, and cytidine triphosphate were suitable cosubstrates. Mutational studies using recombinant coronavirus nsp9 and nsp12 proteins and genetically engineered HCoV-229E mutants identified residues essential for NiRAN-mediated nsp9 NMPylation and virus replication in cell culture. The data corroborate predictions on NiRAN active-site residues and establish an essential role for the nsp9 N3826 residue in both nsp9 NMPylation in vitro and virus replication. This residue is part of a conserved N-terminal NNE tripeptide sequence and shown to be the only invariant residue in nsp9 and its homologs in viruses of the family Coronaviridae The study provides a solid basis for functional studies of other nidovirus NMPylation activities and suggests a possible target for antiviral drug development.
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14
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Chiumenti M, Navarro B, Candresse T, Flores R, Di Serio F. Reassessing species demarcation criteria in viroid taxonomy by pairwise identity matrices. Virus Evol 2021; 7:veab001. [PMID: 33623708 PMCID: PMC7887442 DOI: 10.1093/ve/veab001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
With a small, circular and non-protein coding RNA genome, viroids are the smallest infectious agents. They invade plants, which in turn may develop symptoms. Since their discovery about 50 years ago, more than thirty viroids have been reported and classified using as species demarcation less than 90 per cent sequence identity on the overall genome and evidence of biological divergence with respect to the closest related viroids. In the last few years, new viroids have been identified that infect latently their (frequently) woody hosts and have a narrow experimental hosts range, complicating and slowing down studies on their biology. As a consequence, several viroids are still waiting for classification. Moreover, the number of new viroids is expected to increase in the next years due to the use of high-throughput sequencing technologies with diagnostics purposes. Therefore, establishment of reliable species demarcation criteria mainly based on molecular features of viroids is needed. Here, viroid classification is reassessed and a scheme based on pairwise sequence identity matrices is developed. After identifying a threshold pairwise identity score (PWIS) for each viroid genus, to be used as a species demarcation criterion, we show that most of those yet unclassified viroids can be assigned to a known or to a new species, thus limiting the need for additional biological evidence to only a few more complex situations. The advantages of this PWIS-based method are that the proposed identity thresholds for species demarcations are not arbitrarily established and evidence for biological divergence is not mandatory. Importantly, the current classification is not essentially modified. A protocol for a tentative fast classification of new viroids according to the proposed approach is also provided.
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Affiliation(s)
- Michela Chiumenti
- Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle Ricerche, Via Amendola 122/D, Bari 70126, Italy
| | - Beatriz Navarro
- Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle Ricerche, Via Amendola 122/D, Bari 70126, Italy
| | - Thierry Candresse
- Univ. Bordeaux, INRAE, UMR BFP, Villenave d'Ornon Cedex, CS20032 33882, France
| | - Ricardo Flores
- Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia, Valencia 46022, Spain
| | - Francesco Di Serio
- Istituto per la Protezione Sostenibile delle Piante, Consiglio Nazionale delle Ricerche, Via Amendola 122/D, Bari 70126, Italy
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15
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Busch A, Homeier-Bachmann T, Abdel-Glil MY, Hackbart A, Hotzel H, Tomaso H. Using affinity propagation clustering for identifying bacterial clades and subclades with whole-genome sequences of Francisella tularensis. PLoS Negl Trop Dis 2020; 14:e0008018. [PMID: 32991594 PMCID: PMC7523947 DOI: 10.1371/journal.pntd.0008018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 12/27/2019] [Indexed: 12/31/2022] Open
Abstract
By combining a reference-independent SNP analysis and average nucleotide identity (ANI) with affinity propagation clustering (APC), we developed a significantly improved methodology allowing resolving phylogenetic relationships, based on objective criteria. These bioinformatics tools can be used as a general ruler to determine phylogenetic relationships and clustering of bacteria, exemplary done with Francisella (F.) tularensis. Molecular epidemiology of F. tularensis is currently assessed mostly based on laboratory methods and molecular analysis. The high evolutionary stability and the clonal nature makes Francisella ideal for subtyping with single nucleotide polymorphisms (SNPs). Sequencing and real-time PCR can be used to validate the SNP analysis. We investigate whole-genome sequences of 155 F. tularensis subsp. holarctica isolates. Phylogenetic testing was based on SNPs and average nucleotide identity (ANI) as reference independent, alignment-free methods taking small-scale and large-scale differences within the genomes into account. Especially the whole genome SNP analysis with kSNP3.0 allowed deciphering quite subtle signals of systematic differences in molecular variation. Affinity propagation clustering (APC) resulted in three clusters showing the known clades B.4, B.6, and B.12. These data correlated with the results of real-time PCR assays targeting canSNPs loci. Additionally, we detected two subtle sub-clusters. SplitsTree was used with standard-setting using the aligned SNPs from Parsnps. Together APC, HierBAPS, and SplitsTree enabled us to generate hypotheses about epidemiologic relationships between bacterial clusters and describing the distribution of isolates. Our data indicate that the choice of the typing technique can increase our understanding of the pathogenesis and transmission of diseases with the eventual for prevention. This is opening perspectives to be applied to other bacterial species. The data provide evidence that Germany might be the collision zone where the clade B.12, also known as the East European clade, overlaps with the clade B.6, also known as the Iberian clade. Described methods allow generating a new, more detailed perspective for F. tularensis subsp. holarctica phylogeny. These results may encourage to determine phylogenetic relationships and clustering of other bacteria the same way.
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Affiliation(s)
- Anne Busch
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
- * E-mail:
| | - Timo Homeier-Bachmann
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Friedrich-Loeffler-Institut, Greifswald-Insel Riems, Germany
| | - Mostafa Y. Abdel-Glil
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
| | - Anja Hackbart
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
| | - Helmut Hotzel
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
| | - Herbert Tomaso
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Jena, Germany
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16
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Tyagi A, Nigam S, Chauhan RS. A Concise Review of Baseline Facts of SARS‐CoV‐2 for Interdisciplinary Research. ChemistrySelect 2020. [DOI: 10.1002/slct.202002420] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Adish Tyagi
- Chemistry Division Bhabha Atomic Research Centre Trombay Mumbai 400085 INDIA
| | - Sandeep Nigam
- Chemistry Division Bhabha Atomic Research Centre Trombay Mumbai 400085 INDIA
| | - Rohit Singh Chauhan
- Chemistry Department K. J. Somaiya College of Science and Commerce Mumbai 400077 India
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17
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Klimentov AS, Belova OA, Kholodilov IS, Butenko AM, Bespyatova LA, Bugmyrin SV, Chernetsov N, Ivannikova AY, Kovalchuk IV, Nafeev AA, Oorzhak ND, Pilikova OM, Polienko AE, Purmak KA, Romanenko EN, Romanova LI, Saryglar AA, Solomashchenko NI, Shamsutdinov AF, Vakalova EV, Lukashev AN, Karganova GG, Gmyl AP. Phlebovirus sequences detected in ticks collected in Russia: Novel phleboviruses, distinguishing criteria and high tick specificity. INFECTION GENETICS AND EVOLUTION 2020; 85:104524. [PMID: 32891876 DOI: 10.1016/j.meegid.2020.104524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 08/24/2020] [Accepted: 08/29/2020] [Indexed: 10/23/2022]
Abstract
Phlebovirus is an abundant and rather heterogeneous genus within the Phenuiviridae family (order Bunyavirales). The genus Phlebovirus is divided into two antigenic complexes, which also correspond to the main vector: sandflies/mosquitoes and ticks. Previously, only sandfly/mosquito-borne phleboviruses were associated with human disease, such as Rift Valley fever virus, Toscana virus, Sicilian and Naples Sandfly fever viruses and others. Until recently, tick-borne phleboviruses were not considered as human pathogens. After the discovery of severe fever with thrombocytopenia syndrome, interest to tick-borne phleboviruses has increased dramatically. In the last decade, many novel phleboviruses have been reported in different regions. Despite this, the diversity, ecology and pathogenicity of these viruses still remain obscure. The aim of this work was to study the diversity of phleboviruses in ticks collected in several regions of Russia. We used pan-phlebovirus RT-PCR assays based on multiple degenerate primers targeting the polymerase gene fragment. Arthropod specimens were collected from 2005 to 2018. A total of 5901 Ixodidae ticks combined into 1116 pools were screened. A total of 160 specific amplicons were produced. In three cases RT-PCR assays amplified two distinct viruses from same tick pools. Direct sequencing of amplicons and subsequent phylogenetic analysis revealed twelve representatives of divergent phlebovirus groups. Based on the distribution of pairwise nucleotide sequence identity values, a cut-off (88%) was suggested to distinguish tick-borne phleboviruses. According to this provisional criterion, two viruses found here could be termed novel, while ten viruses have been described in previous studies. Detected phleboviruses demonstrated almost perfect specificity to a tick species or, at least, a genus. The same pattern was observed for tick-borne phleboviruses found in different studies around the world. Viruses that grouped together on a phylogenetic tree and differed less than this sequence identity threshold suggested above were hosted by ticks from the same genus.
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Affiliation(s)
- Alexander S Klimentov
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of RAS, Moscow 108819, Russia; Gamaleya Research Center for Epidemiology and Microbiology of the Ministry of Health of the Russian Federation, Moscow 123098, Russia.
| | - Oxana A Belova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of RAS, Moscow 108819, Russia
| | - Ivan S Kholodilov
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of RAS, Moscow 108819, Russia
| | - Alexander M Butenko
- Gamaleya Research Center for Epidemiology and Microbiology of the Ministry of Health of the Russian Federation, Moscow 123098, Russia
| | - Liubov A Bespyatova
- Institute of Biology, Karelian Research Centre of RAS, Petrozavodsk 185910, Russia
| | - Sergey V Bugmyrin
- Institute of Biology, Karelian Research Centre of RAS, Petrozavodsk 185910, Russia
| | - Nikita Chernetsov
- Zoological Institute of RAS, St. Petersburg 199034, Russia; Dept. Vertebrate Zoology, St. Petersburg State University, St. Petersburg 199034, Russia
| | - Anna Y Ivannikova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of RAS, Moscow 108819, Russia
| | - Irina V Kovalchuk
- Office of Rospotrebnadzor in the Stavropol Territory, Stavropol 355008, Russia; Stavropol State Medical University, Stavropol 355017, Russia
| | - Alexander A Nafeev
- Center for Hygiene and Epidemiology in the Ulyanovsk Region, Ulyanovsk 432005, Russia
| | | | - Olga M Pilikova
- Black Sea Anti-Plague Station of Rospotrebnadzor, Novorossiysk 353919, Russia
| | - Alexandra E Polienko
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of RAS, Moscow 108819, Russia
| | - Kristina A Purmak
- Center for Hygiene and Epidemiology in the Stavropol Kray, Stavropol 355008, Russia
| | - Evgeniya N Romanenko
- Center for Hygiene and Epidemiology in the Stavropol Kray, Stavropol 355008, Russia
| | - Lidiya Iu Romanova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of RAS, Moscow 108819, Russia; Institute for Translational Medicine and Biotechnology, Sechenov University, Moscow 119991, Russia
| | | | - Nataliya I Solomashchenko
- Stavropol State Medical University, Stavropol 355017, Russia; Center for Hygiene and Epidemiology in the Stavropol Kray, Stavropol 355008, Russia
| | - Anton F Shamsutdinov
- Kazan Scientific Research Institute of Epidemiology and Microbiology of Rospotrebnadzor, Kazan 420015, Russia
| | - Elena V Vakalova
- Astrakhan Anti-Plague Station of Rospotrebnadzor, Astrakhan 414000, Russia
| | - Alexander N Lukashev
- Martsinovsky Institute of Medical Parasitology, Tropical and Vector-Borne Diseases, Sechenov University, Moscow 119435, Russia
| | - Galina G Karganova
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of RAS, Moscow 108819, Russia; Institute for Translational Medicine and Biotechnology, Sechenov University, Moscow 119991, Russia
| | - Anatoly P Gmyl
- Chumakov Federal Scientific Center for Research and Development of Immune-and-Biological Products of RAS, Moscow 108819, Russia
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18
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Wu JL, Tseng WP, Lin CH, Lee TF, Chung MY, Huang CH, Chen SY, Hsueh PR, Chen SC. Four point-of-care lateral flow immunoassays for diagnosis of COVID-19 and for assessing dynamics of antibody responses to SARS-CoV-2. J Infect 2020; 81:435-442. [PMID: 32553841 PMCID: PMC7295501 DOI: 10.1016/j.jinf.2020.06.023] [Citation(s) in RCA: 113] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 05/30/2020] [Accepted: 06/01/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVES We aimed to evaluate the role of rapid serological tests in the management of coronavirus disease 2019 (COVID-19) patients. METHODS This retrospective study enrolled 16 real-time reverse transcription polymerase chain reaction-confirmed symptomatic patients with COVID-19 and 58 COVID-19 negative patients at a medical center in Taiwan over a 3-month period. Serial serum samples were collected and tested for antibody response using four point-of-care (POC) lateral flow immunoassays (LFIA) (ALLTEST 2019-nCoV IgG/IgM Rapid Test, Dynamiker 2019-nCoV IgG/IgM Rapid Test, ASK COVID-19 IgG/IgM Rapid Test, and Wondfo SARS-CoV-2 Antibody Test). Time-dependent detection sensitivity and timeliness of seroconversion were determined and compared between the four POC rapid tests. RESULTS The overall sensitivity and specificity of the four tests for detecting anti-SARS-CoV-2 antibodies after 3 weeks of symptom onset were 100% and 100%, respectively. There was no significant difference between the rapid tests used for detection of IgM and IgG separately and those used for detection of combined total antibody (mainly IgM/IgG). There was no significant difference between the four POC rapid tests in terms of time required for determining seroconversion of COVID-19. Patients with COVID-19 with pneumonia demonstrated shorter seroconversion time than those without pneumonia. CONCLUSION Though the POC antibody rapid tests based on LFIA showed reliable performance in the detection of SARS-CoV-2-specific antibodies, the results of these tests should be interpreted and applied appropriately in the context of antibody dynamic of COVID-19 infection. COVID-19 patients complicated with pneumonia exhibited earlier anti-SARS-CoV-2 antibody response than COVID-19 patients without pneumonia.
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Affiliation(s)
- Jhong-Lin Wu
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan
| | - Wen-Pin Tseng
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan
| | - Chien-Hao Lin
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan
| | - Tai-Fen Lee
- Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan
| | - Ming-Yi Chung
- Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan
| | - Chien-Hua Huang
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan
| | - Shey-Ying Chen
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan; Center for Quality Management, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.
| | - Po-Ren Hsueh
- Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan; Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan.
| | - Shyr-Chyr Chen
- Department of Emergency Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, 7, Chung Shan South Road, Taipei 100, Taiwan
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19
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Gorbalenya AE, Krupovic M, Mushegian A, Kropinski AM, Siddell SG, Varsani A, Adams MJ, Davison AJ, Dutilh BE, Harrach B, Harrison RL, Junglen S, King AMQ, Knowles NJ, Lefkowitz EJ, Nibert ML, Rubino L, Sabanadzovic S, Sanfaçon H, Simmonds P, Walker PJ, Zerbini FM, Kuhn JH. The new scope of virus taxonomy: partitioning the virosphere into 15 hierarchical ranks. Nat Microbiol 2020; 5:668-674. [PMID: 32341570 PMCID: PMC7186216 DOI: 10.1038/s41564-020-0709-x] [Citation(s) in RCA: 146] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 03/11/2020] [Indexed: 01/17/2023]
Abstract
Virus taxonomy emerged as a discipline in the middle of the twentieth century. Traditionally, classification by virus taxonomists has been focussed on the grouping of relatively closely related viruses. However, during the past few years, the International Committee on Taxonomy of Viruses (ICTV) has recognized that the taxonomy it develops can be usefully extended to include the basal evolutionary relationships among distantly related viruses. Consequently, the ICTV has changed its Code to allow a 15-rank classification hierarchy that closely aligns with the Linnaean taxonomic system and may accommodate the entire spectrum of genetic divergence in the virosphere. The current taxonomies of three human pathogens, Ebola virus, severe acute respiratory syndrome coronavirus and herpes simplex virus 1 are used to illustrate the impact of the expanded rank structure. This new rank hierarchy of virus taxonomy will stimulate further research on virus origins and evolution, and vice versa, and could promote crosstalk with the taxonomies of cellular organisms.
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20
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Gorbalenya AE, Baker SC, Baric RS, de Groot RJ, Drosten C, Gulyaeva AA, Haagmans BL, Lauber C, Leontovich AM, Neuman BW, Penzar D, Perlman S, Poon LLM, Samborskiy DV, Sidorov IA, Sola I, Ziebuhr J. The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2. Nat Microbiol 2020; 5:536-544. [PMID: 32123347 PMCID: PMC7095448 DOI: 10.1038/s41564-020-0695-z] [Citation(s) in RCA: 4358] [Impact Index Per Article: 1089.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 02/19/2020] [Indexed: 02/06/2023]
Abstract
The present outbreak of a coronavirus-associated acute respiratory disease called coronavirus disease 19 (COVID-19) is the third documented spillover of an animal coronavirus to humans in only two decades that has resulted in a major epidemic. The Coronaviridae Study Group (CSG) of the International Committee on Taxonomy of Viruses, which is responsible for developing the classification of viruses and taxon nomenclature of the family Coronaviridae, has assessed the placement of the human pathogen, tentatively named 2019-nCoV, within the Coronaviridae. Based on phylogeny, taxonomy and established practice, the CSG recognizes this virus as forming a sister clade to the prototype human and bat severe acute respiratory syndrome coronaviruses (SARS-CoVs) of the species Severe acute respiratory syndrome-related coronavirus, and designates it as SARS-CoV-2. In order to facilitate communication, the CSG proposes to use the following naming convention for individual isolates: SARS-CoV-2/host/location/isolate/date. While the full spectrum of clinical manifestations associated with SARS-CoV-2 infections in humans remains to be determined, the independent zoonotic transmission of SARS-CoV and SARS-CoV-2 highlights the need for studying viruses at the species level to complement research focused on individual pathogenic viruses of immediate significance. This will improve our understanding of virus–host interactions in an ever-changing environment and enhance our preparedness for future outbreaks.
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21
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The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2. Nat Microbiol 2020. [PMID: 32123347 DOI: 10.1038/s41564-020-0695] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The present outbreak of a coronavirus-associated acute respiratory disease called coronavirus disease 19 (COVID-19) is the third documented spillover of an animal coronavirus to humans in only two decades that has resulted in a major epidemic. The Coronaviridae Study Group (CSG) of the International Committee on Taxonomy of Viruses, which is responsible for developing the classification of viruses and taxon nomenclature of the family Coronaviridae, has assessed the placement of the human pathogen, tentatively named 2019-nCoV, within the Coronaviridae. Based on phylogeny, taxonomy and established practice, the CSG recognizes this virus as forming a sister clade to the prototype human and bat severe acute respiratory syndrome coronaviruses (SARS-CoVs) of the species Severe acute respiratory syndrome-related coronavirus, and designates it as SARS-CoV-2. In order to facilitate communication, the CSG proposes to use the following naming convention for individual isolates: SARS-CoV-2/host/location/isolate/date. While the full spectrum of clinical manifestations associated with SARS-CoV-2 infections in humans remains to be determined, the independent zoonotic transmission of SARS-CoV and SARS-CoV-2 highlights the need for studying viruses at the species level to complement research focused on individual pathogenic viruses of immediate significance. This will improve our understanding of virus–host interactions in an ever-changing environment and enhance our preparedness for future outbreaks.
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22
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Gorbalenya AE, Baker SC, Baric RS, de Groot RJ, Drosten C, Gulyaeva AA, Haagmans BL, Lauber C, Leontovich AM, Neuman BW, Penzar D, Perlman S, Poon LL, Samborskiy D, Sidorov IA, Sola I, Ziebuhr J. The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2. Nat Microbiol 2020; 5:536-544. [PMID: 32123347 DOI: 10.1101/2020.02.07.937862] [Citation(s) in RCA: 399] [Impact Index Per Article: 99.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 02/19/2020] [Indexed: 05/21/2023]
Abstract
The present outbreak of a coronavirus-associated acute respiratory disease called coronavirus disease 19 (COVID-19) is the third documented spillover of an animal coronavirus to humans in only two decades that has resulted in a major epidemic. The Coronaviridae Study Group (CSG) of the International Committee on Taxonomy of Viruses, which is responsible for developing the classification of viruses and taxon nomenclature of the family Coronaviridae, has assessed the placement of the human pathogen, tentatively named 2019-nCoV, within the Coronaviridae. Based on phylogeny, taxonomy and established practice, the CSG recognizes this virus as forming a sister clade to the prototype human and bat severe acute respiratory syndrome coronaviruses (SARS-CoVs) of the species Severe acute respiratory syndrome-related coronavirus, and designates it as SARS-CoV-2. In order to facilitate communication, the CSG proposes to use the following naming convention for individual isolates: SARS-CoV-2/host/location/isolate/date. While the full spectrum of clinical manifestations associated with SARS-CoV-2 infections in humans remains to be determined, the independent zoonotic transmission of SARS-CoV and SARS-CoV-2 highlights the need for studying viruses at the species level to complement research focused on individual pathogenic viruses of immediate significance. This will improve our understanding of virus–host interactions in an ever-changing environment and enhance our preparedness for future outbreaks.
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23
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The species Severe acute respiratory syndrome-related coronavirus: classifying 2019-nCoV and naming it SARS-CoV-2. Nat Microbiol 2020. [PMID: 32123347 DOI: 10.1038/s41564-020-0598-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
The present outbreak of a coronavirus-associated acute respiratory disease called coronavirus disease 19 (COVID-19) is the third documented spillover of an animal coronavirus to humans in only two decades that has resulted in a major epidemic. The Coronaviridae Study Group (CSG) of the International Committee on Taxonomy of Viruses, which is responsible for developing the classification of viruses and taxon nomenclature of the family Coronaviridae, has assessed the placement of the human pathogen, tentatively named 2019-nCoV, within the Coronaviridae. Based on phylogeny, taxonomy and established practice, the CSG recognizes this virus as forming a sister clade to the prototype human and bat severe acute respiratory syndrome coronaviruses (SARS-CoVs) of the species Severe acute respiratory syndrome-related coronavirus, and designates it as SARS-CoV-2. In order to facilitate communication, the CSG proposes to use the following naming convention for individual isolates: SARS-CoV-2/host/location/isolate/date. While the full spectrum of clinical manifestations associated with SARS-CoV-2 infections in humans remains to be determined, the independent zoonotic transmission of SARS-CoV and SARS-CoV-2 highlights the need for studying viruses at the species level to complement research focused on individual pathogenic viruses of immediate significance. This will improve our understanding of virus–host interactions in an ever-changing environment and enhance our preparedness for future outbreaks.
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Wu Y, Ho W, Huang Y, Jin DY, Li S, Liu SL, Liu X, Qiu J, Sang Y, Wang Q, Yuen KY, Zheng ZM. SARS-CoV-2 is an appropriate name for the new coronavirus. Lancet 2020; 395:949-950. [PMID: 32151324 PMCID: PMC7133598 DOI: 10.1016/s0140-6736(20)30557-2] [Citation(s) in RCA: 208] [Impact Index Per Article: 52.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 03/04/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Yuntao Wu
- National Center for Biodefense and Infectious Diseases, School of Systems Biology, George Mason University, Manassas, VA 20110, USA.
| | - Wenzhe Ho
- Department of Pathology & Laboratory Medicine and Department of Anatomy & Cell Biology, Temple University Lewis Katz School of Medicine, Philadelphia, PA, USA
| | - Yaowei Huang
- Institute of Preventive Veterinary Medicine, Key Laboratory of Animal Virology of Ministry of Agriculture, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Dong-Yan Jin
- School of Biomedical Sciences, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, China
| | - Shiyue Li
- Department of Epidemiology, Wuhan University School of Health Sciences, Wuhan, Hubei, China
| | - Shan-Lu Liu
- Infectious Diseases Institute, Center for Retrovirus Research, Departments of Veterinary Biosciences, Microbial Infection and Immunity, and Microbiology, The Ohio State University, Columbus, OH, USA
| | - Xuefeng Liu
- Department of Pathology, Georgetown University Medical Center, Washington, DC, USA
| | - Jianming Qiu
- Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, KS, USA
| | - Yongming Sang
- Department of Agricultural and Environmental Sciences, College of Agriculture, Human and Natural Sciences, Tennessee State University, Nashville, TN, USA
| | - Qiuhong Wang
- Food Animal Health Research Program, Department of Veterinary Preventive Medicine, The Ohio State University, Wooster, OH, USA
| | - Kwok-Yung Yuen
- Department of Microbiology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, China
| | - Zhi-Ming Zheng
- Center for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA.
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Chang T, Guo M, Zhang W, Niu J, Wang JJ. First Report of a Mesonivirus and Its Derived Small RNAs in an Aphid Species Aphis citricidus (Hemiptera: Aphididae), Implying Viral Infection Activity. JOURNAL OF INSECT SCIENCE (ONLINE) 2020; 20:14. [PMID: 32282036 PMCID: PMC7153580 DOI: 10.1093/jisesa/ieaa022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Indexed: 06/11/2023]
Abstract
We report a new positive-sense single-stranded RNA (ss RNA+) virus from the brown citrus aphid Aphis citricidus. The 20,300 nucleotide (nt)-long viral genome contains five open-reading frames and encodes six conserved domains (TM2, 3CLpro, TM3, RdRp, Zm, and HEL1). Phylogenetic analysis and amino acid sequence analysis revealed this virus might belong to an unassigned genus in the family Mesoniviridae. The presence of the virus was also confirmed in the field population. Importantly, analysis of the virus-derived small RNAs showed a 22-nt peak, implying that viral infection triggers the small interfering RNA pathway as antiviral immunity in aphids. This is the first report of a mesonivirus in invertebrates other than mosquitoes.
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Affiliation(s)
- Tengyu Chang
- College of Plant Protection, Key Laboratory of Entomology and Pest Control Engineering, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, International Joint Laboratory on China-Belgium Sustainable Crop Pest Control, Southwest University, Chongqing, China
| | - Mengmeng Guo
- College of Plant Protection, Key Laboratory of Entomology and Pest Control Engineering, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, International Joint Laboratory on China-Belgium Sustainable Crop Pest Control, Southwest University, Chongqing, China
| | - Wei Zhang
- College of Plant Protection, Key Laboratory of Entomology and Pest Control Engineering, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, International Joint Laboratory on China-Belgium Sustainable Crop Pest Control, Southwest University, Chongqing, China
| | - Jinzhi Niu
- College of Plant Protection, Key Laboratory of Entomology and Pest Control Engineering, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, International Joint Laboratory on China-Belgium Sustainable Crop Pest Control, Southwest University, Chongqing, China
| | - Jin-Jun Wang
- College of Plant Protection, Key Laboratory of Entomology and Pest Control Engineering, Southwest University, Chongqing, China
- Academy of Agricultural Sciences, International Joint Laboratory on China-Belgium Sustainable Crop Pest Control, Southwest University, Chongqing, China
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Käfer S, Paraskevopoulou S, Zirkel F, Wieseke N, Donath A, Petersen M, Jones TC, Liu S, Zhou X, Middendorf M, Junglen S, Misof B, Drosten C. Re-assessing the diversity of negative strand RNA viruses in insects. PLoS Pathog 2019; 15:e1008224. [PMID: 31830128 PMCID: PMC6932829 DOI: 10.1371/journal.ppat.1008224] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 12/26/2019] [Accepted: 11/19/2019] [Indexed: 12/21/2022] Open
Abstract
The spectrum of viruses in insects is important for subjects as diverse as public health, veterinary medicine, food production, and biodiversity conservation. The traditional interest in vector-borne diseases of humans and livestock has drawn the attention of virus studies to hematophagous insect species. However, these represent only a tiny fraction of the broad diversity of Hexapoda, the most speciose group of animals. Here, we systematically probed the diversity of negative strand RNA viruses in the largest and most representative collection of insect transcriptomes from samples representing all 34 extant orders of Hexapoda and 3 orders of Entognatha, as well as outgroups, altogether representing 1243 species. Based on profile hidden Markov models we detected 488 viral RNA-directed RNA polymerase (RdRp) sequences with similarity to negative strand RNA viruses. These were identified in members of 324 arthropod species. Selection for length, quality, and uniqueness left 234 sequences for analyses, showing similarity to genomes of viruses classified in Bunyavirales (n = 86), Articulavirales (n = 54), and several orders within Haploviricotina (n = 94). Coding-complete genomes or nearly-complete subgenomic assemblies were obtained in 61 cases. Based on phylogenetic topology and the availability of coding-complete genomes we estimate that at least 20 novel viral genera in seven families need to be defined, only two of them monospecific. Seven additional viral clades emerge when adding sequences from the present study to formerly monospecific lineages, potentially requiring up to seven additional genera. One long sequence may indicate a novel family. For segmented viruses, cophylogenies between genome segments were generally improved by the inclusion of viruses from the present study, suggesting that in silico misassembly of segmented genomes is rare or absent. Contrary to previous assessments, significant virus-host codivergence was identified in major phylogenetic lineages based on two different approaches of codivergence analysis in a hypotheses testing framework. In spite of these additions to the known spectrum of viruses in insects, we caution that basing taxonomic decisions on genome information alone is challenging due to technical uncertainties, such as the inability to prove integrity of complete genome assemblies of segmented viruses.
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Affiliation(s)
- Simon Käfer
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Free University, Humboldt-University and Berlin Institute of Health, Berlin, Germany
- Center for Molecular Biodiversity Research, Zoological Research Museum Alexander Koenig, Bonn, Germany
| | - Sofia Paraskevopoulou
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Free University, Humboldt-University and Berlin Institute of Health, Berlin, Germany
| | - Florian Zirkel
- Institute of Virology, University of Bonn Medical Centre, Bonn, Germany
| | - Nicolas Wieseke
- Swarm Intelligence and Complex Systems Group, Department of Computer Science, Leipzig University, Leipzig, Germany
| | - Alexander Donath
- Center for Molecular Biodiversity Research, Zoological Research Museum Alexander Koenig, Bonn, Germany
| | - Malte Petersen
- Senckenberg Biodiversity and Climate Research Centre, Senckenberg Gesellschaft für Naturforschung, Frankfurt am Main, Germany
| | - Terry C. Jones
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Free University, Humboldt-University and Berlin Institute of Health, Berlin, Germany
- Center for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge, United Kingdom
| | - Shanlin Liu
- BGI-Shenzhen, China Beishan Industrial Zone, Shenzhen, Guangdong Province, China
| | - Xin Zhou
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing, China
| | - Martin Middendorf
- Swarm Intelligence and Complex Systems Group, Department of Computer Science, Leipzig University, Leipzig, Germany
| | - Sandra Junglen
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Free University, Humboldt-University and Berlin Institute of Health, Berlin, Germany
- German Center for Infection Research (DZIF), associated partner site Charité, Berlin, Germany
| | - Bernhard Misof
- Center for Molecular Biodiversity Research, Zoological Research Museum Alexander Koenig, Bonn, Germany
| | - Christian Drosten
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Free University, Humboldt-University and Berlin Institute of Health, Berlin, Germany
- German Center for Infection Research (DZIF), associated partner site Charité, Berlin, Germany
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He L, Dong R, He RL, Yau SST. A novel alignment-free method for HIV-1 subtype classification. INFECTION GENETICS AND EVOLUTION 2019; 77:104080. [PMID: 31683009 DOI: 10.1016/j.meegid.2019.104080] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/08/2019] [Accepted: 10/20/2019] [Indexed: 11/16/2022]
Abstract
HIV-1 is the most common and pathogenic strain of human immunodeficiency virus consisting of many subtypes. To study the difference among HIV-1 subtypes in infection, diagnosis and drug design, it is important to identify HIV-1 subtypes from clinical HIV-1 samples. In this work, we propose an effective numeric representation called Subsequence Natural Vector (SNV) to encode HIV-1 sequences. Using the representation, we introduce an improved linear discriminant analysis method to classify HIV-1 viruses correctly. SNV is based on distribution of nucleotides in HIV-1 viral sequences. It not only computes the number of nucleotides, but also describes the position and variance of nucleotides in viruses. To validate our alignment-free method, 6902 complete genomes and 11,668 pol gene sequences of HIV-1 subtypes were collected from the up-to-date Los Alamos HIV database. SNV outperforms the three popular methods, Kameris, Comet and REGA, with almost 100% Sensitivity and Specificity, also with much less time. Our subtyping algorithm especially works better for circulating recombinant forms (CRFs) consisting of a few sequences. Our approach is also powerful to separate unique recombinant forms (URFs) from other subtypes with 100% Sensitivity and Specificity. Moreover, phylogenetic trees based on SNV representation are constructed using full-length HIV-1 genomes and pol genes respectively, where viruses from the same subtype are clustered together correctly.
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Affiliation(s)
- Lily He
- Department of Mathematical Sciences, Tsinghua University, Beijing 100084, PR China
| | - Rui Dong
- Department of Mathematical Sciences, Tsinghua University, Beijing 100084, PR China
| | - Rong Lucy He
- Department of Biological Sciences, Chicago State University, Chicago, United States of America
| | - Stephen S-T Yau
- Department of Mathematical Sciences, Tsinghua University, Beijing 100084, PR China.
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28
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Tokak S, Özdemir M. İnsan parechoviruslarının özellikleri, epidemiyolojisi ve klinik önemi. CUKUROVA MEDICAL JOURNAL 2019. [DOI: 10.17826/cumj.528673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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29
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Laenen L, Vergote V, Calisher CH, Klempa B, Klingström J, Kuhn JH, Maes P. Hantaviridae: Current Classification and Future Perspectives. Viruses 2019; 11:v11090788. [PMID: 31461937 PMCID: PMC6784073 DOI: 10.3390/v11090788] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 08/23/2019] [Indexed: 01/19/2023] Open
Abstract
In recent years, negative-sense RNA virus classification and taxon nomenclature have undergone considerable transformation. In 2016, the new order Bunyavirales was established, elevating the previous genus Hantavirus to family rank, thereby creating Hantaviridae. Here we summarize affirmed taxonomic modifications of this family from 2016 to 2019. Changes involve the admission of >30 new hantavirid species and the establishment of subfamilies and novel genera based on DivErsity pArtitioning by hieRarchical Clustering (DEmARC) analysis of genomic sequencing data. We outline an objective framework that can be used in future classification schemes when more hantavirids sequences will be available. Finally, we summarize current taxonomic proposals and problems in hantavirid taxonomy that will have to be addressed shortly.
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Affiliation(s)
- Lies Laenen
- KU Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Zoonotic Infectious Diseases Unit, 3000 Leuven, Belgium
- Department of Laboratory Medicine, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Valentijn Vergote
- KU Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Zoonotic Infectious Diseases Unit, 3000 Leuven, Belgium
| | | | - Boris Klempa
- Biomedical Research Center, Slovak Academy of Sciences, 845 05 Bratislava, Slovakia
| | - Jonas Klingström
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, SE-141 86 Stockholm, Sweden
| | - Jens H Kuhn
- Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, B-8200 Research Plaza, Frederick, MD 21702, USA
| | - Piet Maes
- KU Leuven, Department of Microbiology and Immunology, Rega Institute for Medical Research, Zoonotic Infectious Diseases Unit, 3000 Leuven, Belgium.
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30
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Simulation data for the estimation of numerical constants for approximating pairwise evolutionary distances between amino acid sequences. Data Brief 2019; 25:104212. [PMID: 31440543 PMCID: PMC6699465 DOI: 10.1016/j.dib.2019.104212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/05/2019] [Accepted: 06/25/2019] [Indexed: 12/11/2022] Open
Abstract
Estimating the number of substitution events per site that have occurred during the evolution of a pair of amino acid sequences is a common task in phylogenetics and comparative genomics that often requires quite slow maximum-likelihood procedures when taking into account explicit evolutionary models. Data presented in this article are large sets of numbers of substitution events and associated numbers of observed differences between pairs of aligned amino acid sequences that have been generated through a simulation procedure of sequence evolution under a broad range of evolutionary models. These data are available at https://zenodo.org/record/2653704 (doi:10.5281/zenodo.2653704). They are accompanied in this paper by figures showing the strong relationship between the corresponding evolutionary and uncorrected distances, as well as estimated numerical constants that determine non-linear functions that fit the simulated data. These numerical constants can be useful to quickly estimate pairwise evolutionary distances directly from uncorrected distances between aligned amino acid sequences.
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31
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Vasilakis N, Tesh RB, Popov VL, Widen SG, Wood TG, Forrester NL, Gonzalez JP, Saluzzo JF, Alkhovsky S, Lam SK, Mackenzie JS, Walker PJ. Exploiting the Legacy of the Arbovirus Hunters. Viruses 2019; 11:E471. [PMID: 31126128 PMCID: PMC6563318 DOI: 10.3390/v11050471] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/15/2019] [Accepted: 05/21/2019] [Indexed: 12/13/2022] Open
Abstract
In recent years, it has become evident that a generational gap has developed in the community of arbovirus research. This apparent gap is due to the dis-investment of training for the next generation of arbovirologists, which threatens to derail the rich history of virus discovery, field epidemiology, and understanding of the richness of diversity that surrounds us. On the other hand, new technologies have resulted in an explosion of virus discovery that is constantly redefining the virosphere and the evolutionary relationships between viruses. This paradox presents new challenges that may have immediate and disastrous consequences for public health when yet to be discovered arboviruses emerge. In this review we endeavor to bridge this gap by providing a historical context for the work being conducted today and provide continuity between the generations. To this end, we will provide a narrative of the thrill of scientific discovery and excitement and the challenges lying ahead.
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Affiliation(s)
- Nikos Vasilakis
- Department of Pathology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Institute for Human Infection and Immunity, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Center for Tropical Diseases, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
| | - Robert B Tesh
- Department of Pathology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Institute for Human Infection and Immunity, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Center for Tropical Diseases, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
| | - Vsevolod L Popov
- Department of Pathology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Institute for Human Infection and Immunity, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Center for Tropical Diseases, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
| | - Steve G Widen
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, 301 University Blvd, Galveston TX 77555, USA.
| | - Thomas G Wood
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, 301 University Blvd, Galveston TX 77555, USA.
| | - Naomi L Forrester
- Department of Pathology, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Institute for Human Infection and Immunity, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
- Center for Tropical Diseases, University of Texas Medical Branch, 301 University Blvd, Galveston, TX 77555, USA.
| | - Jean Paul Gonzalez
- Center of Excellence for Emerging & Zoonotic Animal Disease, Kansas State University, Manhattan, KS 66502, USA.
| | | | - Sergey Alkhovsky
- Ivanovsky Institute of Virology, N.F. Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Healthcare of the Russian Federation, 123098, 18 Gamaleya str., Moscow, Russia.
| | - Sai Kit Lam
- Department of Medical Microbiology, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - John S Mackenzie
- Faculty of Medical Sciences, Curtin University, Perth, Western Australia 6102, Australia.
| | - Peter J Walker
- School of Biological Sciences, The University of Queensland, St Lucia, QLD 4072, Australia.
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32
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Ali A, Melcher U. Modeling of Mutational Events in the Evolution of Viruses. Viruses 2019; 11:v11050418. [PMID: 31060293 PMCID: PMC6563203 DOI: 10.3390/v11050418] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/27/2019] [Accepted: 05/02/2019] [Indexed: 11/24/2022] Open
Abstract
Diverse studies of viral evolution have led to the recognition that the evolutionary rates of viral taxa observed are dependent on the time scale being investigated—with short-term studies giving fast substitution rates, and orders of magnitude lower rates for deep calibrations. Although each of these factors may contribute to this time dependent rate phenomenon, a more fundamental cause should be considered. We sought to test computationally whether the basic phenomena of virus evolution (mutation, replication, and selection) can explain the relationships between the evolutionary and phylogenetic distances. We tested, by computational inference, the hypothesis that the phylogenetic distances between the pairs of sequences are functions of the evolutionary path lengths between them. A Basic simulation revealed that the relationship between simulated genetic and mutational distances is non-linear, and can be consistent with different rates of nucleotide substitution at different depths of branches in phylogenetic trees.
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Affiliation(s)
- Akhtar Ali
- Department of Biological Sciences, University of Tulsa, Tulsa, OK 74104, USA.
| | - Ulrich Melcher
- Department of Biochemistry & Molecular Biology, Oklahoma State University, Stillwater, OK 74078-3035, USA.
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33
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Kanitz M, Blanck S, Heine A, Gulyaeva AA, Gorbalenya AE, Ziebuhr J, Diederich WE. Structural basis for catalysis and substrate specificity of a 3C-like cysteine protease from a mosquito mesonivirus. Virology 2019; 533:21-33. [PMID: 31078932 PMCID: PMC7111312 DOI: 10.1016/j.virol.2019.05.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 04/30/2019] [Accepted: 05/01/2019] [Indexed: 01/05/2023]
Abstract
Cavally virus (CavV) is a mosquito-borne plus-strand RNA virus in the family Mesoniviridae (order Nidovirales). We present X-ray structures for the CavV 3C-like protease (3CLpro), as a free enzyme and in complex with a peptide aldehyde inhibitor mimicking the P4-to-P1 residues of a natural substrate. The 3CLpro structure (refined to 1.94 Å) shows that the protein forms dimers. The monomers are comprised of N-terminal domains I and II, which adopt a chymotrypsin-like fold, and a C-terminal α-helical domain III. The catalytic Cys-His dyad is assisted by a complex network of interactions involving a water molecule that mediates polar contacts between the catalytic His and a conserved Asp located in the domain II-III junction and is suitably positioned to stabilize the developing positive charge of the catalytic His in the transition state during catalysis. The study also reveals the structural basis for the distinct P2 Asn-specific substrate-binding pocket of mesonivirus 3CLpros. First structure of a 3CLpro of an invertebrate RNA virus. Structural basis of the unique substrate specificity defined by Asn at the P2 position of mesonivirus 3CLpro substrates. Emerging role of a conserved Asp residue that assists the Cys-His catalytic dyad in vertebrate and invertebrate 3CLpros.
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Affiliation(s)
- Manuel Kanitz
- Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany; Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany
| | - Sandra Blanck
- Institute of Medical Virology, Justus Liebig University, Giessen, Germany
| | - Andreas Heine
- Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany
| | - Anastasia A Gulyaeva
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, the Netherlands
| | - Alexander E Gorbalenya
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, the Netherlands; Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia; Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, Russia
| | - John Ziebuhr
- Institute of Medical Virology, Justus Liebig University, Giessen, Germany.
| | - Wibke E Diederich
- Center for Tumor Biology and Immunology, Philipps University, Marburg, Germany; Institute of Pharmaceutical Chemistry, Philipps University, Marburg, Germany.
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34
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Tarek F, Hassou N, Benchekroun MN, Boughribil S, Hafid J, Ennaji MM. Impact of rotavirus and hepatitis A virus by worldwide climatic changes during the period between 2000 and 2013. Bioinformation 2019; 15:194-200. [PMID: 31354195 PMCID: PMC6637397 DOI: 10.6026/97320630015194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/10/2018] [Accepted: 11/12/2018] [Indexed: 11/23/2022] Open
Abstract
Enteric viruses are present in the environment as a result of the discharge of poorly or untreated wastewater. The spread of enteric viruses in the environment depend to human activities like stools of infected individuals ejected in the external environment can be transmitted by water sources and back to susceptible individuals for other cycles of illness. Among the enteric viruses Rotaviruses (RV) and Hepatitis A viruses (HAV) is the most detected in wastewater causing gastroenteritis and acute hepatitis. Therefore, it is of interest to climate change, mainly temperature and carbon Dioxide (CO2) variations, on Rotavirus and Hepatitis A as a model of enteric viruses present in the aquatic environment using computational modelling tools. The results of genetic ratio showed a negative correlation between the epidemiological data and the mutation rate. However, the correlation was positive between the temperature, CO2 increase, and the rate of mutation. The positive correlation is explained by the adaptation of the viruses to the climatic changes, the RNA polymerase of the RV induces errors to adapt to the environmental conditions. The simultaneous increase in number of infections and temperature in 2010 has been demonstrated in previous studies deducing that viral pathogenicity increase with temperature increase.
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Affiliation(s)
- Fatima Tarek
- Team of Virology and Oncology, Laboratory of Virology, Microbiology, Quality and Biotechnology/Ecotoxicology and Biodiversity, Faculty of Sciences and Techniques Mohammedia, University Hassan II of Casablanca
| | - Najwa Hassou
- Team of Virology and Oncology, Laboratory of Virology, Microbiology, Quality and Biotechnology/Ecotoxicology and Biodiversity, Faculty of Sciences and Techniques Mohammedia, University Hassan II of Casablanca
| | - Mohammed Nabil Benchekroun
- Team of Biotechnology an Environment Laboratory of Virology, Microbiology, Quality and Biotechnology/ Eco toxicology and Biodiversity, Faculty of Sciences and techniques Mohammedia,University Hassan II of Casablanca
| | - Said Boughribil
- Team of Eco toxicology and Biodiversity, Laboratory of Virology, Microbiology, Quality and Biotechnology/Ecotoxicology and Biodiversity, Faculty of Sciences and techniques Mohammedia, University Hassan II of Casablanca
| | - Jamal Hafid
- Team of Immuno parasitology, Laboratory food, Environment and Health FST Gueliz, University Cadi Ayyad Marrakech
| | - My Mustapha Ennaji
- Team of Virology and Oncology, Laboratory of Virology, Microbiology, Quality and Biotechnology/Ecotoxicology and Biodiversity, Faculty of Sciences and Techniques Mohammedia, University Hassan II of Casablanca
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Saberi A, Gulyaeva AA, Brubacher JL, Newmark PA, Gorbalenya AE. A planarian nidovirus expands the limits of RNA genome size. PLoS Pathog 2018; 14:e1007314. [PMID: 30383829 PMCID: PMC6211748 DOI: 10.1371/journal.ppat.1007314] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 09/02/2018] [Indexed: 12/28/2022] Open
Abstract
RNA viruses are the only known RNA-protein (RNP) entities capable of autonomous replication (albeit within a permissive host environment). A 33.5 kilobase (kb) nidovirus has been considered close to the upper size limit for such entities; conversely, the minimal cellular DNA genome is in the 100–300 kb range. This large difference presents a daunting gap for the transition from primordial RNP to contemporary DNA-RNP-based life. Whether or not RNA viruses represent transitional steps towards DNA-based life, studies of larger RNA viruses advance our understanding of the size constraints on RNP entities and the role of genome size in virus adaptation. For example, emergence of the largest previously known RNA genomes (20–34 kb in positive-stranded nidoviruses, including coronaviruses) is associated with the acquisition of a proofreading exoribonuclease (ExoN) encoded in the open reading frame 1b (ORF1b) in a monophyletic subset of nidoviruses. However, apparent constraints on the size of ORF1b, which encodes this and other key replicative enzymes, have been hypothesized to limit further expansion of these viral RNA genomes. Here, we characterize a novel nidovirus (planarian secretory cell nidovirus; PSCNV) whose disproportionately large ORF1b-like region including unannotated domains, and overall 41.1-kb genome, substantially extend the presumed limits on RNA genome size. This genome encodes a predicted 13,556-aa polyprotein in an unconventional single ORF, yet retains canonical nidoviral genome organization and expression, as well as key replicative domains. These domains may include functionally relevant substitutions rarely or never before observed in highly conserved sites of RdRp, NiRAN, ExoN and 3CLpro. Our evolutionary analysis suggests that PSCNV diverged early from multi-ORF nidoviruses, and acquired additional genes, including those typical of large DNA viruses or hosts, e.g. Ankyrin and Fibronectin type II, which might modulate virus-host interactions. PSCNV's greatly expanded genome, proteomic complexity, and unique features–impressive in themselves–attest to the likelihood of still-larger RNA genomes awaiting discovery. RNA viruses are the only known RNA-protein (RNP) entities capable of autonomous replication. The upper genome size for such entities was assumed to be <35 kb; conversely, the minimal cellular DNA genome is in the 100–300 kilobase (kb) range. This large difference presents a daunting gap for the proposed evolution of contemporary DNA-RNP-based life from primordial RNP entities. Here, we describe a nidovirus from planarians, named planarian secretory cell nidovirus (PSCNV), whose 41.1 kb genome is 23% larger than any riboviral genome yet discovered. This increase is nearly equivalent in size to the entire poliovirus genome, and it equips PSCNV with an unprecedented extra coding capacity to adapt. PSCNV has broken apparent constraints on the size of the genomic subregion that encodes core replication machinery in other nidoviruses, including coronaviruses, and has acquired genes not previously observed in RNA viruses. This virus challenges and advances our understanding of the limits to RNA genome size.
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Affiliation(s)
- Amir Saberi
- Howard Hughes Medical Institute, Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
| | - Anastasia A. Gulyaeva
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
| | - John L. Brubacher
- Department of Biology, Canadian Mennonite University, Winnipeg, Canada
| | - Phillip A. Newmark
- Howard Hughes Medical Institute, Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States of America
- * E-mail: (PAN); (AEG)
| | - Alexander E. Gorbalenya
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow, Russia
- * E-mail: (PAN); (AEG)
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36
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Laenen L, Vergote V, Kafetzopoulou LE, Wawina TB, Vassou D, Cook JA, Hugot JP, Deboutte W, Kang HJ, Witkowski PT, Köppen-Rung P, Krüger DH, Licková M, Stang A, Striešková L, Szemeš T, Markowski J, Hejduk J, Kafetzopoulos D, Van Ranst M, Yanagihara R, Klempa B, Maes P. A Novel Hantavirus of the European Mole, Bruges Virus, Is Involved in Frequent Nova Virus Coinfections. Genome Biol Evol 2018; 10:45-55. [PMID: 29272370 PMCID: PMC5758900 DOI: 10.1093/gbe/evx268] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/18/2017] [Indexed: 02/06/2023] Open
Abstract
Hantaviruses are zoonotic viruses with a complex evolutionary history of virus–host coevolution and cross-species transmission. Although hantaviruses have a broad reservoir host range, virus–host relationships were previously thought to be strict, with a single virus species infecting a single host species. Here, we describe Bruges virus, a novel hantavirus harbored by the European mole (Talpa europaea), which is the well-known host of Nova virus. Phylogenetic analyses of all three genomic segments showed tree topology inconsistencies, suggesting that Bruges virus has emerged from cross-species transmission and ancient reassortment events. A high number of coinfections with Bruges and Nova viruses was detected, but no evidence was found for reassortment between these two hantaviruses. These findings highlight the complexity of hantavirus evolution and the importance of further investigation of hantavirus–reservoir relationships.
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Affiliation(s)
- Lies Laenen
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Valentijn Vergote
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Liana Eleni Kafetzopoulou
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Tony Bokalanga Wawina
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Despoina Vassou
- Genomics Facility, Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas (IMBB-FORTH), Heraklion, Greece
| | - Joseph A Cook
- Department of Biology, Museum of Southwestern Biology, University of New Mexico
| | - Jean-Pierre Hugot
- Department of Systematics and Evolution, L'Institut de Systématique, Évolution, Biodiversité, Muséum National d'Histoire Naturelle, Paris, France
| | - Ward Deboutte
- Laboratory of Viral Metagenomics, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Hae Ji Kang
- Department of Pediatrics, and Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa
| | - Peter T Witkowski
- Charité School of Medicine, Institute of Medical Virology, Berlin, Germany
| | - Panja Köppen-Rung
- Charité School of Medicine, Institute of Medical Virology, Berlin, Germany
| | - Detlev H Krüger
- Charité School of Medicine, Institute of Medical Virology, Berlin, Germany
| | - Martina Licková
- Biomedical Research Center, Institute of Virology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Alexander Stang
- Department of Molecular and Medical Virology, Ruhr-University Bochum, Germany
| | - Lucia Striešková
- Department of Molecular Biology, Comenius University, Bratislava, Slovakia
| | - Tomáš Szemeš
- Department of Molecular Biology, Comenius University, Bratislava, Slovakia
| | - Janusz Markowski
- Department of Teacher Training and Biodiversity Studies, Faculty of Biology and Environmental Protection, University of Lódz, Poland
| | - Janusz Hejduk
- Department of Teacher Training and Biodiversity Studies, Faculty of Biology and Environmental Protection, University of Lódz, Poland
| | - Dimitris Kafetzopoulos
- Genomics Facility, Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology-Hellas (IMBB-FORTH), Heraklion, Greece
| | - Marc Van Ranst
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Belgium
| | - Richard Yanagihara
- Department of Pediatrics, and Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa
| | - Boris Klempa
- Charité School of Medicine, Institute of Medical Virology, Berlin, Germany.,Biomedical Research Center, Institute of Virology, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Piet Maes
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, Rega Institute for Medical Research, KU Leuven, Belgium
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37
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Gorbalenya AE. Increasing the number of available ranks in virus taxonomy from five to ten and adopting the Baltimore classes as taxa at the basal rank. Arch Virol 2018; 163:2933-2936. [PMID: 29942981 PMCID: PMC6132925 DOI: 10.1007/s00705-018-3915-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 05/14/2018] [Indexed: 12/16/2022]
Abstract
This opinion article makes a case for increasing the number of ranks used in virus taxonomy from the current five to ten (as are used to classify cellular life forms) and placing the Baltimore classes in the proposed basal rank of domain. These suggestions aim at initiating the process of accommodation of Baltimore classes in virus taxonomy and extension of the virus taxonomy scale to encompass also the most distant relationships.
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Affiliation(s)
- Alexander E Gorbalenya
- Department of Medical Microbiology, Leiden University Medical Center, 2300, RC, Leiden, The Netherlands.
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119899, Moscow, Russia.
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Modha S, Thanki AS, Cotmore SF, Davison AJ, Hughes J. ViCTree: an automated framework for taxonomic classification from protein sequences. Bioinformatics 2018; 34:2195-2200. [PMID: 29474519 PMCID: PMC6022645 DOI: 10.1093/bioinformatics/bty099] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 01/08/2018] [Accepted: 02/20/2018] [Indexed: 11/14/2022] Open
Abstract
Motivation The increasing rate of submission of genetic sequences into public databases is providing a growing resource for classifying the organisms that these sequences represent. To aid viral classification, we have developed ViCTree, which automatically integrates the relevant sets of sequences in NCBI GenBank and transforms them into an interactive maximum likelihood phylogenetic tree that can be updated automatically. ViCTree incorporates ViCTreeView, which is a JavaScript-based visualization tool that enables the tree to be explored interactively in the context of pairwise distance data. Results To demonstrate utility, ViCTree was applied to subfamily Densovirinae of family Parvoviridae. This led to the identification of six new species of insect virus. Availability and implementation ViCTree is open-source and can be run on any Linux- or Unix-based computer or cluster. A tutorial, the documentation and the source code are available under a GPL3 license, and can be accessed at http://bioinformatics.cvr.ac.uk/victree_web/. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Sejal Modha
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
| | - Anil S Thanki
- Earlham Institute, Norwich Research Park, Norwich, UK
| | | | - Andrew J Davison
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
| | - Joseph Hughes
- MRC-University of Glasgow Centre for Virus Research, Glasgow, UK
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Fischer S, Freuling CM, Müller T, Pfaff F, Bodenhofer U, Höper D, Fischer M, Marston DA, Fooks AR, Mettenleiter TC, Conraths FJ, Homeier-Bachmann T. Defining objective clusters for rabies virus sequences using affinity propagation clustering. PLoS Negl Trop Dis 2018; 12:e0006182. [PMID: 29357361 PMCID: PMC5794188 DOI: 10.1371/journal.pntd.0006182] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 02/01/2018] [Accepted: 12/19/2017] [Indexed: 11/18/2022] Open
Abstract
Rabies is caused by lyssaviruses, and is one of the oldest known zoonoses. In recent years, more than 21,000 nucleotide sequences of rabies viruses (RABV), from the prototype species rabies lyssavirus, have been deposited in public databases. Subsequent phylogenetic analyses in combination with metadata suggest geographic distributions of RABV. However, these analyses somewhat experience technical difficulties in defining verifiable criteria for cluster allocations in phylogenetic trees inviting for a more rational approach. Therefore, we applied a relatively new mathematical clustering algorythm named ‘affinity propagation clustering’ (AP) to propose a standardized sub-species classification utilizing full-genome RABV sequences. Because AP has the advantage that it is computationally fast and works for any meaningful measure of similarity between data samples, it has previously been applied successfully in bioinformatics, for analysis of microarray and gene expression data, however, cluster analysis of sequences is still in its infancy. Existing (516) and original (46) full genome RABV sequences were used to demonstrate the application of AP for RABV clustering. On a global scale, AP proposed four clusters, i.e. New World cluster, Arctic/Arctic-like, Cosmopolitan, and Asian as previously assigned by phylogenetic studies. By combining AP with established phylogenetic analyses, it is possible to resolve phylogenetic relationships between verifiably determined clusters and sequences. This workflow will be useful in confirming cluster distributions in a uniform transparent manner, not only for RABV, but also for other comparative sequence analyses. Rabies is one of the oldest known zoonoses, caused by lyssaviruses. In recent years, more than 21,000 nucleotide sequences for rabies viruses (RABV) have been deposited in public databases. In this study, a novel mathematical approach called affinity propagation (AP) clustering, a highly powerful tool, to verifiably divide full genome RABV sequences into genetic clusters, was used. A panel of existing and novel RABV full genome sequences was used to demonstrate the application of AP for RABV clustering. Using a combination of AP with established phylogenetic analyses is useful in resolving phylogenetic relationships between more objectively determined clusters and sequences. This workflow will help to substantiate a transparent cluster distribution, not only for RABV, but also for other comparative sequence analyses.
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Affiliation(s)
- Susanne Fischer
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Greifswald-Insel Riems, Germany
| | - Conrad M. Freuling
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology, OIE Reference Laboratory for Rabies, WHO Collaborating Centre for Rabies Surveillance and Research, Greifswald-Insel Riems, Germany
| | - Thomas Müller
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology, OIE Reference Laboratory for Rabies, WHO Collaborating Centre for Rabies Surveillance and Research, Greifswald-Insel Riems, Germany
- * E-mail:
| | - Florian Pfaff
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Diagnostic Virology, Greifswald-Insel Riems, Germany
| | - Ulrich Bodenhofer
- Institute of Bioinformatics, Johannes Kepler University Linz, Linz, Austria
| | - Dirk Höper
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology, OIE Reference Laboratory for Rabies, WHO Collaborating Centre for Rabies Surveillance and Research, Greifswald-Insel Riems, Germany
| | - Mareike Fischer
- Institute of Mathematics and Computer Science, University Greifswald, Greifswald, Germany
| | - Denise A. Marston
- Wildlife Zoonoses and Vector-Borne Diseases Research Group, Animal and Plant Health Agency (APHA), OIE Reference Laboratory for Rabies, WHO Collaborating Centre for Characterization of Lyssaviruses, Weybridge, United Kingdom
| | - Anthony R. Fooks
- Wildlife Zoonoses and Vector-Borne Diseases Research Group, Animal and Plant Health Agency (APHA), OIE Reference Laboratory for Rabies, WHO Collaborating Centre for Characterization of Lyssaviruses, Weybridge, United Kingdom
| | - Thomas C. Mettenleiter
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Molecular Virology and Cell Biology, OIE Reference Laboratory for Rabies, WHO Collaborating Centre for Rabies Surveillance and Research, Greifswald-Insel Riems, Germany
| | - Franz J. Conraths
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Greifswald-Insel Riems, Germany
| | - Timo Homeier-Bachmann
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Greifswald-Insel Riems, Germany
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Yilmaz H, Karakullukcu A, Turan N, Cizmecigil UY, Yilmaz A, Ozkul AA, Aydin O, Gunduz A, Mete M, Zeyrek FY, Kirazoglu TT, Richt JA, Kocazeybek B. Genotypes of hepatitis a virus in Turkey: first report and clinical profile of children infected with sub-genotypes IA and IIIA. BMC Infect Dis 2017; 17:561. [PMID: 28800730 PMCID: PMC5553755 DOI: 10.1186/s12879-017-2667-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 08/03/2017] [Indexed: 02/05/2023] Open
Abstract
Background Hepatitis A virus (HAV) is a food and water-borne virus causing clinical (mainly hepatitis) and subclinical disease in humans. It is important to characterize circulating strains of HAV in order to prevent HAV infections using efficacious vaccines. The aim of this study was the detection and characterization of the circulating strains of HAV in Turkey by performing serology, RT-PCR, sequencing and phylogenetic analysis. Methods In this study, 355 HAV suspected cases were analysed by ELISA for the presence of antibodies to HAV. RNA was extracted from 54 HAV IgM positive human sera. None of the suspect cases were vaccinated against HAV and they never received blood transfusions. Samples found positive by RT-PCR using primers targeting the VP1/VP2A junction and VP1/VP3 capsid region of HAV, were subjected to sequencing and phylogenetic analyses. Results IgM type antibodies to HAV were detected in 54 patients. Twenty one of them were students. The age of IgM positive cases was between 3 and 60 years. IgM positivity differed in age groups and was higher in the age group 3 to 10 years. Phylogenetic analysis showed that the majority of HAV strains detected in this study belong to the “HAV 1B” cluster. In addition, the HAV sub-genotypes IA (KT874461.1) and IIIA (KT222963.1) were found in 2 children. These sub-genotypes were not previously reported in Turkey. The child who carried sub-genotype IIIA travelled to Afghanistan and presented with abdominal pain, icterus and vomitus. He was positive for anti-HAV IgM and IgG but negative for hepatitis B and C. Liver enzymes like aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, gamma-glutamyl transferase and lactate dehydrogenase were severely elevated. Bilirubin levels were also increased. White blood cells, neutrophils and hemoglobin were decreased while lymphocytes and monocytes were increased. Similar clinical signs and laboratory findings were reported for the child infected with sub-genotype IA but aspartate aminotransferase and alanine aminotransferase were not severely elevated. Conclusions The results indicate that molecular studies determining the HAV genotype variation in Turkey are timely and warranted. The majority of IgM positive cases in 3–10 year old patients indicate that childhood vaccination is important. Sub-genotype IB is the most prevalant genotype in Turkey. Surprisingly, sub-genotype IA and IIIA are also present in Turkey; future diagnostic efforts need to include diagnostic methods which can identify this emerging HAV genotypes. Our results also show that one important risk factor for contracting hepatitis A virus is international travel since genotype IIIA was detected in a child who had travelled to Afghanistan.
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Affiliation(s)
- Huseyin Yilmaz
- Department of Virology, Veterinary Faculty, University of Istanbul, Avcilar, Istanbul, Turkey.
| | - Asiye Karakullukcu
- Department of Microbiology, Cerrahpasa Faculty of Medicine, University of Istanbul, Cerrahpasa, Istanbul, Turkey
| | - Nuri Turan
- Department of Virology, Veterinary Faculty, University of Istanbul, Avcilar, Istanbul, Turkey
| | - Utku Y Cizmecigil
- Department of Virology, Veterinary Faculty, University of Istanbul, Avcilar, Istanbul, Turkey
| | - Aysun Yilmaz
- Department of Virology, Veterinary Faculty, University of Istanbul, Avcilar, Istanbul, Turkey
| | - Ayse A Ozkul
- Department of Child Health and Diseases, Faculty of Medicine, University of Izmir, Karsiyaka, Izmir, Turkey
| | - Ozge Aydin
- Department of Virology, Veterinary Faculty, University of Istanbul, Avcilar, Istanbul, Turkey
| | - Alper Gunduz
- Division of Infectious Diseases and Clinical Microbiology, Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey
| | - Mahmut Mete
- Department of Microbiology, Faculty of Medicine, University of Dicle, Diyarbakir, Turkey
| | - Fadile Y Zeyrek
- Department of Microbiology, Faculty of Medicine, University of Harran, Urfa, Turkey
| | - Taner T Kirazoglu
- Department of Microbiology, Cerrahpasa Faculty of Medicine, University of Istanbul, Cerrahpasa, Istanbul, Turkey
| | - Juergen A Richt
- Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, USA
| | - Bekir Kocazeybek
- Department of Microbiology, Cerrahpasa Faculty of Medicine, University of Istanbul, Cerrahpasa, Istanbul, Turkey
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41
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Remita MA, Halioui A, Malick Diouara AA, Daigle B, Kiani G, Diallo AB. A machine learning approach for viral genome classification. BMC Bioinformatics 2017; 18:208. [PMID: 28399797 PMCID: PMC5387389 DOI: 10.1186/s12859-017-1602-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 03/15/2017] [Indexed: 01/18/2023] Open
Abstract
Background Advances in cloning and sequencing technology are yielding a massive number of viral genomes. The classification and annotation of these genomes constitute important assets in the discovery of genomic variability, taxonomic characteristics and disease mechanisms. Existing classification methods are often designed for specific well-studied family of viruses. Thus, the viral comparative genomic studies could benefit from more generic, fast and accurate tools for classifying and typing newly sequenced strains of diverse virus families. Results Here, we introduce a virus classification platform, CASTOR, based on machine learning methods. CASTOR is inspired by a well-known technique in molecular biology: restriction fragment length polymorphism (RFLP). It simulates, in silico, the restriction digestion of genomic material by different enzymes into fragments. It uses two metrics to construct feature vectors for machine learning algorithms in the classification step. We benchmark CASTOR for the classification of distinct datasets of human papillomaviruses (HPV), hepatitis B viruses (HBV) and human immunodeficiency viruses type 1 (HIV-1). Results reveal true positive rates of 99%, 99% and 98% for HPV Alpha species, HBV genotyping and HIV-1 M subtyping, respectively. Furthermore, CASTOR shows a competitive performance compared to well-known HIV-1 specific classifiers (REGA and COMET) on whole genomes and pol fragments. Conclusion The performance of CASTOR, its genericity and robustness could permit to perform novel and accurate large scale virus studies. The CASTOR web platform provides an open access, collaborative and reproducible machine learning classifiers. CASTOR can be accessed at http://castor.bioinfo.uqam.ca. Electronic supplementary material The online version of this article (doi:10.1186/s12859-017-1602-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Mohamed Amine Remita
- Laboratoire de bioinformatique, département d'informatique, Université du Québec à Montréal, Montreal, P.O. Box 8888 Downtown Station, H3C 3P8, Qc, Canada.,Pharmaqam Center, Université du Québec à Montréal (Québec), Montréal (Quebec), PO BOX 8888 Downtown Station, H3C 3P8, Canada
| | - Ahmed Halioui
- Laboratoire de bioinformatique, département d'informatique, Université du Québec à Montréal, Montreal, P.O. Box 8888 Downtown Station, H3C 3P8, Qc, Canada.,Pharmaqam Center, Université du Québec à Montréal (Québec), Montréal (Quebec), PO BOX 8888 Downtown Station, H3C 3P8, Canada
| | - Abou Abdallah Malick Diouara
- Laboratoire de bioinformatique, département d'informatique, Université du Québec à Montréal, Montreal, P.O. Box 8888 Downtown Station, H3C 3P8, Qc, Canada.,Pharmaqam Center, Université du Québec à Montréal (Québec), Montréal (Quebec), PO BOX 8888 Downtown Station, H3C 3P8, Canada
| | - Bruno Daigle
- Laboratoire de bioinformatique, département d'informatique, Université du Québec à Montréal, Montreal, P.O. Box 8888 Downtown Station, H3C 3P8, Qc, Canada.,Pharmaqam Center, Université du Québec à Montréal (Québec), Montréal (Quebec), PO BOX 8888 Downtown Station, H3C 3P8, Canada
| | - Golrokh Kiani
- Laboratoire de bioinformatique, département d'informatique, Université du Québec à Montréal, Montreal, P.O. Box 8888 Downtown Station, H3C 3P8, Qc, Canada.,Pharmaqam Center, Université du Québec à Montréal (Québec), Montréal (Quebec), PO BOX 8888 Downtown Station, H3C 3P8, Canada
| | - Abdoulaye Baniré Diallo
- Laboratoire de bioinformatique, département d'informatique, Université du Québec à Montréal, Montreal, P.O. Box 8888 Downtown Station, H3C 3P8, Qc, Canada. .,Pharmaqam Center, Université du Québec à Montréal (Québec), Montréal (Quebec), PO BOX 8888 Downtown Station, H3C 3P8, Canada.
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42
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Domain Organization and Evolution of the Highly Divergent 5' Coding Region of Genomes of Arteriviruses, Including the Novel Possum Nidovirus. J Virol 2017; 91:JVI.02096-16. [PMID: 28053107 DOI: 10.1128/jvi.02096-16] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 12/27/2016] [Indexed: 12/31/2022] Open
Abstract
In five experimentally characterized arterivirus species, the 5'-end genome coding region encodes the most divergent nonstructural proteins (nsp's), nsp1 and nsp2, which include papain-like proteases (PLPs) and other poorly characterized domains. These are involved in regulation of transcription, polyprotein processing, and virus-host interaction. Here we present results of a bioinformatics analysis of this region of 14 arterivirus species, including that of the most distantly related virus, wobbly possum disease virus (WPDV), determined by a modified 5' rapid amplification of cDNA ends (RACE) protocol. By combining profile-profile comparisons and phylogeny reconstruction, we identified an association of the four distinct domain layouts of nsp1-nsp2 with major phylogenetic lineages, implicating domain gain, including duplication, and loss in the early nsp1 evolution. Specifically, WPDV encodes highly divergent homologs of PLP1a, PLP1b, PLP1c, and PLP2, with PLP1a lacking the catalytic Cys residue, but does not encode nsp1 Zn finger (ZnF) and "nuclease" domains, which are conserved in other arteriviruses. Unexpectedly, our analysis revealed that the only catalytically active nsp1 PLP of equine arteritis virus (EAV), known as PLP1b, is most similar to PLP1c and thus is likely to be a PLP1b paralog. In all non-WPDV arteriviruses, PLP1b/c and PLP1a show contrasting patterns of conservation, with the N- and C-terminal subdomains, respectively, being enriched with conserved residues, which is indicative of different functional specializations. The least conserved domain of nsp2, the hypervariable region (HVR), has its size varied 5-fold and includes up to four copies of a novel PxPxPR motif that is potentially recognized by SH3 domain-containing proteins. Apparently, only EAV lacks the signal that directs -2 ribosomal frameshifting in the nsp2 coding region.IMPORTANCE Arteriviruses comprise a family of mammalian enveloped positive-strand RNA viruses that include some of the most economically important pathogens of swine. Most of our knowledge about this family has been obtained through characterization of viruses from five species: Equine arteritis virus, Simian hemorrhagic fever virus, Lactate dehydrogenase-elevating virus, Porcine respiratory and reproductive syndrome virus 1, and Porcine respiratory and reproductive syndrome virus 2 Here we present the results of comparative genomics analyses of viruses from all known 14 arterivirus species, including the most distantly related virus, WPDV, whose genome sequence was completed in this study. Our analysis focused on the multifunctional 5'-end genome coding region that encodes multidomain nonstructural proteins 1 and 2. Using diverse bioinformatics techniques, we identified many patterns of evolutionary conservation that are specific to members of distinct arterivirus species, both characterized and novel, or their groups. They are likely associated with structural and functional determinants important for virus replication and virus-host interaction.
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Abstract
The number and diversity of viral sequences that are identified in metagenomic data far exceeds that of experimentally characterized virus isolates. In a recent workshop, a panel of experts discussed the proposal that, with appropriate quality control, viruses that are known only from metagenomic data can, and should be, incorporated into the official classification scheme of the International Committee on Taxonomy of Viruses (ICTV). Although a taxonomy that is based on metagenomic sequence data alone represents a substantial departure from the traditional reliance on phenotypic properties, the development of a robust framework for sequence-based virus taxonomy is indispensable for the comprehensive characterization of the global virome. In this Consensus Statement article, we consider the rationale for why metagenomic sequence data should, and how it can, be incorporated into the ICTV taxonomy, and present proposals that have been endorsed by the Executive Committee of the ICTV.
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A taxonomy update for the family Polyomaviridae. Arch Virol 2016; 161:1739-50. [PMID: 26923930 DOI: 10.1007/s00705-016-2794-y] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Accepted: 02/12/2016] [Indexed: 12/16/2022]
Abstract
Many distinct polyomaviruses infecting a variety of vertebrate hosts have recently been discovered, and their complete genome sequence could often be determined. To accommodate this fast-growing diversity, the International Committee on Taxonomy of Viruses (ICTV) Polyomaviridae Study Group designed a host- and sequence-based rationale for an updated taxonomy of the family Polyomaviridae. Applying this resulted in numerous recommendations of taxonomical revisions, which were accepted by the Executive Committee of the ICTV in December 2015. New criteria for definition and creation of polyomavirus species were established that were based on the observed distance between large T antigen coding sequences. Four genera (Alpha-, Beta, Gamma- and Deltapolyomavirus) were delineated that together include 73 species. Species naming was made as systematic as possible - most species names now consist of the binomial name of the host species followed by polyomavirus and a number reflecting the order of discovery. It is hoped that this important update of the family taxonomy will serve as a stable basis for future taxonomical developments.
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Abstract
Until recently, members of the monogeneric family Arenaviridae (arenaviruses) have been known to infect only muroid rodents and, in one case, possibly phyllostomid bats. The paradigm of arenaviruses exclusively infecting small mammals shifted dramatically when several groups independently published the detection and isolation of a divergent group of arenaviruses in captive alethinophidian snakes. Preliminary phylogenetic analyses suggest that these reptilian arenaviruses constitute a sister clade to mammalian arenaviruses. Here, the members of the International Committee on Taxonomy of Viruses (ICTV) Arenaviridae Study Group, together with other experts, outline the taxonomic reorganization of the family Arenaviridae to accommodate reptilian arenaviruses and other recently discovered mammalian arenaviruses and to improve compliance with the Rules of the International Code of Virus Classification and Nomenclature (ICVCN). PAirwise Sequence Comparison (PASC) of arenavirus genomes and NP amino acid pairwise distances support the modification of the present classification. As a result, the current genus Arenavirus is replaced by two genera, Mammarenavirus and Reptarenavirus, which are established to accommodate mammalian and reptilian arenaviruses, respectively, in the same family. The current species landscape among mammalian arenaviruses is upheld, with two new species added for Lunk and Merino Walk viruses and minor corrections to the spelling of some names. The published snake arenaviruses are distributed among three new separate reptarenavirus species. Finally, a non-Latinized binomial species name scheme is adopted for all arenavirus species. In addition, the current virus abbreviations have been evaluated, and some changes are introduced to unequivocally identify each virus in electronic databases, manuscripts, and oral proceedings.
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Lehmann KC, Gulyaeva A, Zevenhoven-Dobbe JC, Janssen GMC, Ruben M, Overkleeft HS, van Veelen PA, Samborskiy DV, Kravchenko AA, Leontovich AM, Sidorov IA, Snijder EJ, Posthuma CC, Gorbalenya AE. Discovery of an essential nucleotidylating activity associated with a newly delineated conserved domain in the RNA polymerase-containing protein of all nidoviruses. Nucleic Acids Res 2015; 43:8416-34. [PMID: 26304538 PMCID: PMC4787807 DOI: 10.1093/nar/gkv838] [Citation(s) in RCA: 170] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 08/08/2015] [Indexed: 11/13/2022] Open
Abstract
RNA viruses encode an RNA-dependent RNA polymerase (RdRp) that catalyzes the synthesis of their RNA(s). In the case of positive-stranded RNA viruses belonging to the order Nidovirales, the RdRp resides in a replicase subunit that is unusually large. Bioinformatics analysis of this non-structural protein has now revealed a nidoviral signature domain (genetic marker) that is N-terminally adjacent to the RdRp and has no apparent homologs elsewhere. Based on its conservation profile, this domain is proposed to have nucleotidylation activity. We used recombinant non-structural protein 9 of the arterivirus equine arteritis virus (EAV) and different biochemical assays, including irreversible labeling with a GTP analog followed by a proteomics analysis, to demonstrate the manganese-dependent covalent binding of guanosine and uridine phosphates to a lysine/histidine residue. Most likely this was the invariant lysine of the newly identified domain, named nidovirus RdRp-associated nucleotidyltransferase (NiRAN), whose substitution with alanine severely diminished the described binding. Furthermore, this mutation crippled EAV and prevented the replication of severe acute respiratory syndrome coronavirus (SARS-CoV) in cell culture, indicating that NiRAN is essential for nidoviruses. Potential functions supported by NiRAN may include nucleic acid ligation, mRNA capping and protein-primed RNA synthesis, possibilities that remain to be explored in future studies.
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Affiliation(s)
- Kathleen C Lehmann
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands
| | - Anastasia Gulyaeva
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands
| | - Jessika C Zevenhoven-Dobbe
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands
| | - George M C Janssen
- Department of Immunohematology and Blood transfusion, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands
| | - Mark Ruben
- Leiden Institute of Chemistry, Leiden University, 2300 CC, Leiden, The Netherlands
| | - Hermen S Overkleeft
- Leiden Institute of Chemistry, Leiden University, 2300 CC, Leiden, The Netherlands
| | - Peter A van Veelen
- Department of Immunohematology and Blood transfusion, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands
| | - Dmitry V Samborskiy
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia
| | - Alexander A Kravchenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia
| | - Andrey M Leontovich
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia
| | - Igor A Sidorov
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands
| | - Eric J Snijder
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands
| | - Clara C Posthuma
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands
| | - Alexander E Gorbalenya
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, 2300 RC, Leiden, The Netherlands Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119899 Moscow, Russia
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Simmonds P. Methods for virus classification and the challenge of incorporating metagenomic sequence data. J Gen Virol 2015; 96:1193-1206. [PMID: 26068186 DOI: 10.1099/jgv.0.000016] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The division of viruses into orders, families, genera and species provides a classification framework that seeks to organize and make sense of the diversity of viruses infecting animals, plants and bacteria. Classifications are based on similarities in genome structure and organization, the presence of homologous genes and sequence motifs and at lower levels such as species, host range, nucleotide and antigenic relatedness and epidemiology. Classification below the level of family must also be consistent with phylogeny and virus evolutionary histories. Recently developed methods such as PASC, DEMaRC and NVR offer alternative strategies for genus and species assignments that are based purely on degrees of divergence between genome sequences. They offer the possibility of automating classification of the vast number of novel virus sequences being generated by next-generation metagenomic sequencing. However, distance-based methods struggle to deal with the complex evolutionary history of virus genomes that are shuffled by recombination and reassortment, and where taxonomic lineages evolve at different rates. In biological terms, classifications based on sequence distances alone are also arbitrary whereas the current system of virus taxonomy is of utility precisely because it is primarily based upon phenotypic characteristics. However, a separate system is clearly needed by which virus variants that lack biological information might be incorporated into the ICTV classification even if based solely on sequence relationships to existing taxa. For these, simplified taxonomic proposals and naming conventions represent a practical way to expand the existing virus classification and catalogue our rapidly increasing knowledge of virus diversity.
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Affiliation(s)
- Peter Simmonds
- Infection and Immunity Division, Roslin Institute, University of Edinburgh, Easter Bush, Edinburgh EH25 9RG, UK
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Simmonds P. Methods for virus classification and the challenge of incorporating metagenomic sequence data. J Gen Virol 2015. [DOI: 10.1099/vir.0.000016] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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Lehmann KC, Hooghiemstra L, Gulyaeva A, Samborskiy DV, Zevenhoven-Dobbe JC, Snijder EJ, Gorbalenya AE, Posthuma CC. Arterivirus nsp12 versus the coronavirus nsp16 2'-O-methyltransferase: comparison of the C-terminal cleavage products of two nidovirus pp1ab polyproteins. J Gen Virol 2015; 96:2643-2655. [PMID: 26041874 PMCID: PMC7081073 DOI: 10.1099/vir.0.000209] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The 3'-terminal domain of the most conserved ORF1b in three of the four families of the order Nidovirales (except for the family Arteriviridae) encodes a (putative) 2'-O-methyltransferase (2'-O-MTase), known as non structural protein (nsp) 16 in the family Coronaviridae and implicated in methylation of the 5' cap structure of nidoviral mRNAs. As with coronavirus transcripts, arterivirus mRNAs are assumed to possess a 5' cap although no candidate MTases have been identified thus far. To address this knowledge gap, we analysed the uncharacterized nsp12 of arteriviruses, which occupies the ORF1b position equivalent to that of the nidovirus 2'-O-MTase (coronavirus nsp16). In our in-depth bioinformatics analysis of nsp12, the protein was confirmed to be family specific whilst having diverged much further than other nidovirus ORF1b-encoded proteins, including those of the family Coronaviridae. Only one invariant and several partially conserved, predominantly aromatic residues were identified in nsp12, which may adopt a structure with alternating α-helices and β-strands, an organization also found in known MTases. However, no statistically significant similarity was found between nsp12 and the twofold larger coronavirus nsp16, nor could we detect MTase activity in biochemical assays using recombinant equine arteritis virus (EAV) nsp12. Our further analysis established that this subunit is essential for replication of this prototypic arterivirus. Using reverse genetics, we assessed the impact of 25 substitutions at 14 positions, yielding virus phenotypes ranging from WT-like to non-viable. Notably, replacement of the invariant phenylalanine 109 with tyrosine was lethal. We concluded that nsp12 plays an essential role during EAV replication, possibly by acting as a co-factor for another enzyme.
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Affiliation(s)
- Kathleen C Lehmann
- Department of Medical Microbiology, Leiden University Medical Center, 2300 RC, Leiden, The Netherlands
| | - Lisa Hooghiemstra
- Department of Medical Microbiology, Leiden University Medical Center, 2300 RC, Leiden, The Netherlands
| | - Anastasia Gulyaeva
- Department of Medical Microbiology, Leiden University Medical Center, 2300 RC, Leiden, The Netherlands
| | - Dmitry V Samborskiy
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia
| | | | - Eric J Snijder
- Department of Medical Microbiology, Leiden University Medical Center, 2300 RC, Leiden, The Netherlands
| | - Alexander E Gorbalenya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119899 Moscow, Russia.,Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119899 Moscow, Russia.,Department of Medical Microbiology, Leiden University Medical Center, 2300 RC, Leiden, The Netherlands
| | - Clara C Posthuma
- Department of Medical Microbiology, Leiden University Medical Center, 2300 RC, Leiden, The Netherlands
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Weisberg AJ, Elmarakeby HA, Heath LS, Vinatzer BA. Similarity-based codes sequentially assigned to ebolavirus genomes are informative of species membership, associated outbreaks, and transmission chains. Open Forum Infect Dis 2015; 2:ofv024. [PMID: 26034773 PMCID: PMC4438903 DOI: 10.1093/ofid/ofv024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 02/12/2015] [Indexed: 11/14/2022] Open
Abstract
Genome-similarity based codes were assigned to individual ebolavirus isolates. Codes were found to be informative of phylogenetic and epidemiological relationships. It is proposed that such codes should be assigned to every genome-sequenced virus to complement current viral taxonomy. Background. Developing a universal standardized microbial typing and nomenclature system that provides phylogenetic and epidemiological information in real time has never been as urgent in public health as it is today. We previously proposed to use genome similarity as the basis for immediate and precise typing and naming of individual organisms or viruses. In this study, we tested the validity of the proposed system and applied it to the epidemiology of infectious diseases using Ebola virus disease (EVD) outbreaks as the example. Methods. One hundred twenty-eight publicly available ebolavirus genomes were compared with each other, and average nucleotide identity (ANI) was calculated. The ANI was then used to assign unique codes, hereafter referred to as Life Identification Numbers (LINs), to every viral isolate, whereby each LIN consisted of a series of positions reflecting increasing genome similarity. Congruence of LINs with phylogenetic and epidemiological relationships was then determined. Results. Assigned LINs correlate with phylogeny at the species and infraspecies level and can even identify some individual transmission chains during the 2014–2015 EVD epidemic in West Africa. Conclusions. Life Identification Numbers can provide a fast, automated, standardized, and scalable approach to precisely identify and name viral isolates upon genome sequence submission, facilitating unambiguous communication during disease epidemics among clinicians, epidemiologists, and governments.
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