Alejandro Ortigas-Vasquez, Utsav Pandey, Daniel Renner, Chris D Bowen, Susan J Baigent, John Dunn, Hans Cheng, Yongxiu Yao, Andrew F Read, Venugopal Nair, Dave A Kennedy, Moriah L Szpara
Current strategies to understand the molecular basis of Marek’s disease virus (MDV) virulence primarily consist of cataloguing divergent nucleotides between strains with different phenotypes. However, most comparative genomic studies of MDV rely on previously published consensus genomes despite the confirmed existence of MDV strains as mixed viral populations. To assess the reliability of interstrain genomic comparisons relying on published consensus genomes of MDV, we obtained two additional consensus genomes of vaccine strain CVI988 (Rispens) and two additional consensus genomes of the very virulent strain Md5 by sequencing viral stocks and cultured field isolates. In conjunction with the published genomes of CVI988 and Md5, this allowed us to perform 3-way comparisons between multiple consensus genomes of the same strain. We found that consensus genomes of CVI988 can vary in as many as 236 positions involving 13 open reading frames (ORFs). In contrast, we found that Md5 genomes varied only in 11 positions involving a single ORF. Notably, we were able to identify 3 SNPs in the Unique Long region and 16 SNPs in the Unique Short (US) region of CVI988GenBank.BAC that were not present in either CVI988Pirbright.lab or CVI988USDA.PA.field. Recombination analyses of field strains previously described as natural recombinants of CVI988 yielded no evidence of crossover events in the US region when either CVI988Pirbright.lab or CVI988USDA.PA.field were used to represent CVI988 instead of CVI988GenBank.BAC. We were also able to confirm that both CVI988 and Md5 populations were mixed, exhibiting a total of 29 and 27 high-confidence minor variant positions, respectively. However, we did not find any evidence of minor variants in the positions corresponding to the 19 SNPs in the unique regions of CVI988GenBank.BAC. Taken together, our findings suggest that continued reliance on the same published consensus genome of CVI988 may have led to an overestimation of genomic divergence between CVI988 and virulent strains, and that multiple consensus genomes per strain may be necessary to ensure the accuracy of interstrain genomic comparisons.
{"title":"Comparative Analysis of Multiple Consensus Genomes of the Same Strain of Marek’s Disease Virus Reveals Intrastrain Variation","authors":"Alejandro Ortigas-Vasquez, Utsav Pandey, Daniel Renner, Chris D Bowen, Susan J Baigent, John Dunn, Hans Cheng, Yongxiu Yao, Andrew F Read, Venugopal Nair, Dave A Kennedy, Moriah L Szpara","doi":"10.1093/ve/veae047","DOIUrl":"https://doi.org/10.1093/ve/veae047","url":null,"abstract":"Current strategies to understand the molecular basis of Marek’s disease virus (MDV) virulence primarily consist of cataloguing divergent nucleotides between strains with different phenotypes. However, most comparative genomic studies of MDV rely on previously published consensus genomes despite the confirmed existence of MDV strains as mixed viral populations. To assess the reliability of interstrain genomic comparisons relying on published consensus genomes of MDV, we obtained two additional consensus genomes of vaccine strain CVI988 (Rispens) and two additional consensus genomes of the very virulent strain Md5 by sequencing viral stocks and cultured field isolates. In conjunction with the published genomes of CVI988 and Md5, this allowed us to perform 3-way comparisons between multiple consensus genomes of the same strain. We found that consensus genomes of CVI988 can vary in as many as 236 positions involving 13 open reading frames (ORFs). In contrast, we found that Md5 genomes varied only in 11 positions involving a single ORF. Notably, we were able to identify 3 SNPs in the Unique Long region and 16 SNPs in the Unique Short (US) region of CVI988GenBank.BAC that were not present in either CVI988Pirbright.lab or CVI988USDA.PA.field. Recombination analyses of field strains previously described as natural recombinants of CVI988 yielded no evidence of crossover events in the US region when either CVI988Pirbright.lab or CVI988USDA.PA.field were used to represent CVI988 instead of CVI988GenBank.BAC. We were also able to confirm that both CVI988 and Md5 populations were mixed, exhibiting a total of 29 and 27 high-confidence minor variant positions, respectively. However, we did not find any evidence of minor variants in the positions corresponding to the 19 SNPs in the unique regions of CVI988GenBank.BAC. Taken together, our findings suggest that continued reliance on the same published consensus genome of CVI988 may have led to an overestimation of genomic divergence between CVI988 and virulent strains, and that multiple consensus genomes per strain may be necessary to ensure the accuracy of interstrain genomic comparisons.","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"12 1","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141509282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-19eCollection Date: 2024-01-01DOI: 10.1093/ve/veae046
Tongyu Liu, William K Reiser, Timothy J C Tan, Huibin Lv, Joel Rivera-Cardona, Kyle Heimburger, Nicholas C Wu, Christopher B Brooke
The antigenic evolution of the influenza A virus hemagglutinin (HA) gene poses a major challenge for the development of vaccines capable of eliciting long-term protection. Prior efforts to understand the mechanisms that govern viral antigenic evolution mainly focus on HA in isolation, ignoring the fact that HA must act in concert with the viral neuraminidase (NA) during replication and spread. Numerous studies have demonstrated that the degree to which the receptor-binding avidity of HA and receptor-cleaving activity of NA are balanced with each other influences overall viral fitness. We recently showed that changes in NA activity can significantly alter the mutational fitness landscape of HA in the context of a lab-adapted virus strain. Here, we test whether natural variation in relative NA activity can influence the evolutionary potential of HA in the context of the seasonal H1N1 lineage (pdmH1N1) that has circulated in humans since the 2009 pandemic. We observed substantial variation in the relative activities of NA proteins encoded by a panel of H1N1 vaccine strains isolated between 2009 and 2019. We comprehensively assessed the effect of NA background on the HA mutational fitness landscape in the circulating pdmH1N1 lineage using deep mutational scanning and observed pronounced epistasis between NA and residues in or near the receptor-binding site of HA. To determine whether NA variation could influence the antigenic evolution of HA, we performed neutralizing antibody selection experiments using a panel of monoclonal antibodies targeting different HA epitopes. We found that the specific antibody escape profiles of HA were highly contingent upon NA background. Overall, our results indicate that natural variation in NA activity plays a significant role in governing the evolutionary potential of HA in the currently circulating pdmH1N1 lineage.
甲型流感病毒血凝素（HA）基因的抗原进化对开发能够产生长期保护作用的疫苗提出了重大挑战。以前人们在了解病毒抗原进化机制时主要关注的是孤立的 HA，而忽视了 HA 在复制和传播过程中必须与病毒神经氨酸酶（NA）协同作用这一事实。大量研究表明，HA的受体结合活性和NA的受体切割活性在多大程度上相互平衡，会影响病毒的整体适应性。我们最近的研究表明，在实验室适应的病毒株中，NA活性的变化会显著改变HA的突变适应性。在此，我们测试了相对 NA 活性的自然变化是否会影响自 2009 年大流行以来在人类中流行的季节性 H1N1 病毒株（pdmH1N1）中 HA 的进化潜力。我们观察到，2009 年至 2019 年间分离的一组 H1N1 疫苗株编码的 NA 蛋白的相对活性存在很大差异。我们利用深度突变扫描全面评估了NA背景对pdmH1N1循环株系中HA突变适应性景观的影响，并观察到NA与HA受体结合位点内或附近残基之间存在明显的外显性。为了确定 NA 变异是否会影响 HA 的抗原进化，我们使用一组针对不同 HA 表位的单克隆抗体进行了中和抗体选择实验。我们发现，HA的特异性抗体逸出曲线与NA背景密切相关。总之，我们的研究结果表明，在目前流行的 pdmH1N1 病毒系中，NA 活性的自然变异对 HA 的进化潜力起着重要作用。
{"title":"Natural variation in neuraminidase activity influences the evolutionary potential of the seasonal H1N1 lineage hemagglutinin.","authors":"Tongyu Liu, William K Reiser, Timothy J C Tan, Huibin Lv, Joel Rivera-Cardona, Kyle Heimburger, Nicholas C Wu, Christopher B Brooke","doi":"10.1093/ve/veae046","DOIUrl":"10.1093/ve/veae046","url":null,"abstract":"<p><p>The antigenic evolution of the influenza A virus hemagglutinin (HA) gene poses a major challenge for the development of vaccines capable of eliciting long-term protection. Prior efforts to understand the mechanisms that govern viral antigenic evolution mainly focus on HA in isolation, ignoring the fact that HA must act in concert with the viral neuraminidase (NA) during replication and spread. Numerous studies have demonstrated that the degree to which the receptor-binding avidity of HA and receptor-cleaving activity of NA are balanced with each other influences overall viral fitness. We recently showed that changes in NA activity can significantly alter the mutational fitness landscape of HA in the context of a lab-adapted virus strain. Here, we test whether natural variation in relative NA activity can influence the evolutionary potential of HA in the context of the seasonal H1N1 lineage (pdmH1N1) that has circulated in humans since the 2009 pandemic. We observed substantial variation in the relative activities of NA proteins encoded by a panel of H1N1 vaccine strains isolated between 2009 and 2019. We comprehensively assessed the effect of NA background on the HA mutational fitness landscape in the circulating pdmH1N1 lineage using deep mutational scanning and observed pronounced epistasis between NA and residues in or near the receptor-binding site of HA. To determine whether NA variation could influence the antigenic evolution of HA, we performed neutralizing antibody selection experiments using a panel of monoclonal antibodies targeting different HA epitopes. We found that the specific antibody escape profiles of HA were highly contingent upon NA background. Overall, our results indicate that natural variation in NA activity plays a significant role in governing the evolutionary potential of HA in the currently circulating pdmH1N1 lineage.</p>","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"10 1","pages":"veae046"},"PeriodicalIF":5.5,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11196192/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141447687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Influenza infections result in considerable public health and economic impacts each year. One of the contributing factors to the high annual incidence of human influenza is the virus’s ability to evade acquired immunity through continual antigenic evolution. Understanding the evolutionary forces that act within and between hosts is therefore critical to interpreting past trends in influenza virus evolution and in predicting future ones. Several studies have analyzed longitudinal patterns of influenza A virus genetic diversity in natural human infections to assess the relative contributions of selection and genetic drift on within-host evolution. However, in these natural infections, within-host viral populations harbor very few single nucleotide variants, limiting our resolution in understanding the forces acting on these populations in vivo. Further, low levels of within host viral genetic diversity limit the ability to infer the extent of drift across transmission events. Here, we propose to use influenza virus genomic diversity as an alternative signal to better understand within and between host patterns of viral evolution. Specifically, we focus on the dynamics of defective viral genomes (DVGs) which harbor large internal deletions in one or more of influenza virus’s eight gene segments. Our longitudinal analyses of DVGs show that influenza A virus populations are highly dynamic within hosts, corroborating previous findings based on viral genetic diversity that point towards the importance of genetic drift in driving within-host viral evolution. Further, our analysis of DVG populations across transmission pairs indicate that DVGs rarely appeared to be shared, consistent with previous findings indicating the presence of tight transmission bottlenecks. Our analyses demonstrate that viral genomic diversity can be used to complement analyses based on viral genetic diversity to reveal processes that drive viral evolution within and between hosts.
{"title":"Influenza A genomic diversity during human infections underscores the strength of genetic drift and the existence of tight transmission bottlenecks","authors":"Michael A Martin, Nick Berg, Katia Koelle","doi":"10.1093/ve/veae042","DOIUrl":"https://doi.org/10.1093/ve/veae042","url":null,"abstract":"Influenza infections result in considerable public health and economic impacts each year. One of the contributing factors to the high annual incidence of human influenza is the virus’s ability to evade acquired immunity through continual antigenic evolution. Understanding the evolutionary forces that act within and between hosts is therefore critical to interpreting past trends in influenza virus evolution and in predicting future ones. Several studies have analyzed longitudinal patterns of influenza A virus genetic diversity in natural human infections to assess the relative contributions of selection and genetic drift on within-host evolution. However, in these natural infections, within-host viral populations harbor very few single nucleotide variants, limiting our resolution in understanding the forces acting on these populations in vivo. Further, low levels of within host viral genetic diversity limit the ability to infer the extent of drift across transmission events. Here, we propose to use influenza virus genomic diversity as an alternative signal to better understand within and between host patterns of viral evolution. Specifically, we focus on the dynamics of defective viral genomes (DVGs) which harbor large internal deletions in one or more of influenza virus’s eight gene segments. Our longitudinal analyses of DVGs show that influenza A virus populations are highly dynamic within hosts, corroborating previous findings based on viral genetic diversity that point towards the importance of genetic drift in driving within-host viral evolution. Further, our analysis of DVG populations across transmission pairs indicate that DVGs rarely appeared to be shared, consistent with previous findings indicating the presence of tight transmission bottlenecks. Our analyses demonstrate that viral genomic diversity can be used to complement analyses based on viral genetic diversity to reveal processes that drive viral evolution within and between hosts.","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"22 1","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141191273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Monkeypox (MPOX), a zoonotic disease originating in Western and Central Africa in 1970, has seen a recent surge in outbreaks across 100+ countries. A comparative analysis of 404 Monkeypox virus (MPXV) genomes revealed notable changes in microsatellite abundance and density, especially within Clades I, IIa, and IIb. Each clade exhibited unique microsatellite motifs, with twenty-six conserved loci specific to MPXV, suggesting their potential as molecular markers in diagnostics. Additionally, nine genes in the MPXV genome featured ten variable hotspot microsatellite regions associated with surface protein synthesis and host control. Notably, gene OPG153, especially at the SSR locus ‘(ATC)n’, exhibited the most pronounced variations among lineages over time and plays a role in virus pathogenesis within the host cell. These findings not only enhance our understanding of MPXV unique molecular profile but also offer valuable insights into potential pathogenic and evolutionary implications.
{"title":"Comparative genome analysis reveals driving forces behind Monkeypox virus evolution and sheds light on the role of ATC trinucleotide motif","authors":"Preeti Agarwal, Nityendra Shukla, Ajay Bhatia, Sahil Mahfooz, Jitendra Narayan","doi":"10.1093/ve/veae043","DOIUrl":"https://doi.org/10.1093/ve/veae043","url":null,"abstract":"Monkeypox (MPOX), a zoonotic disease originating in Western and Central Africa in 1970, has seen a recent surge in outbreaks across 100+ countries. A comparative analysis of 404 Monkeypox virus (MPXV) genomes revealed notable changes in microsatellite abundance and density, especially within Clades I, IIa, and IIb. Each clade exhibited unique microsatellite motifs, with twenty-six conserved loci specific to MPXV, suggesting their potential as molecular markers in diagnostics. Additionally, nine genes in the MPXV genome featured ten variable hotspot microsatellite regions associated with surface protein synthesis and host control. Notably, gene OPG153, especially at the SSR locus ‘(ATC)n’, exhibited the most pronounced variations among lineages over time and plays a role in virus pathogenesis within the host cell. These findings not only enhance our understanding of MPXV unique molecular profile but also offer valuable insights into potential pathogenic and evolutionary implications.","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"83 1","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141191420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jackie E Mahar, Michelle Wille, Erin Harvey, Craig C Moritz, Edward C Holmes
Lizards have diverse ecologies and evolutionary histories, and represent a promising group to explore how hosts shape virome structure and virus evolution. Yet little is known about the viromes of these animals. In Australia, squamates (lizards and snakes) comprise the most diverse order of vertebrates, and Australia hosts the highest diversity of lizards globally, with the greatest breadth of habitat use. We used meta-transcriptomic sequencing to determine the virome of nine co-distributed, tropical lizard species from three taxonomic families in Australia and analyzed these data to identify host traits associated with viral abundance and diversity. We show that lizards carry a large diversity of viruses, identifying more than 30 novel, highly divergent vertebrate-associated viruses. These viruses were from nine viral families, including several that contain well known pathogens, such as the Flaviviridae, Picornaviridae, Bornaviridae, Iridoviridae and Rhabdoviridae. Members of the Flaviviridae were particularly abundant across species sampled here, largely belonging to the genus Hepacivirus: 14 novel hepaciviruses were identified, broadening the known diversity of this group and better defining its evolution by uncovering new reptilian clades. The evolutionary histories of the viruses studied here frequently aligned with the biogeographic and phylogenetic histories of the hosts, indicating that exogenous viruses may help infer host evolutionary history if sampling is strategic and sampling density high enough. Notably, analysis of alpha and beta diversity revealed that virome composition and richness in the animals sampled here was shaped by host taxonomy, and habitat. In sum, we identified a diverse range of reptile viruses that broadly contributes to our understanding of virus-host ecology and evolution.
{"title":"The diverse liver viromes of Australian geckos and skinks are dominated by hepaciviruses and picornaviruses and reflect host taxonomy and habitat","authors":"Jackie E Mahar, Michelle Wille, Erin Harvey, Craig C Moritz, Edward C Holmes","doi":"10.1093/ve/veae044","DOIUrl":"https://doi.org/10.1093/ve/veae044","url":null,"abstract":"Lizards have diverse ecologies and evolutionary histories, and represent a promising group to explore how hosts shape virome structure and virus evolution. Yet little is known about the viromes of these animals. In Australia, squamates (lizards and snakes) comprise the most diverse order of vertebrates, and Australia hosts the highest diversity of lizards globally, with the greatest breadth of habitat use. We used meta-transcriptomic sequencing to determine the virome of nine co-distributed, tropical lizard species from three taxonomic families in Australia and analyzed these data to identify host traits associated with viral abundance and diversity. We show that lizards carry a large diversity of viruses, identifying more than 30 novel, highly divergent vertebrate-associated viruses. These viruses were from nine viral families, including several that contain well known pathogens, such as the Flaviviridae, Picornaviridae, Bornaviridae, Iridoviridae and Rhabdoviridae. Members of the Flaviviridae were particularly abundant across species sampled here, largely belonging to the genus Hepacivirus: 14 novel hepaciviruses were identified, broadening the known diversity of this group and better defining its evolution by uncovering new reptilian clades. The evolutionary histories of the viruses studied here frequently aligned with the biogeographic and phylogenetic histories of the hosts, indicating that exogenous viruses may help infer host evolutionary history if sampling is strategic and sampling density high enough. Notably, analysis of alpha and beta diversity revealed that virome composition and richness in the animals sampled here was shaped by host taxonomy, and habitat. In sum, we identified a diverse range of reptile viruses that broadly contributes to our understanding of virus-host ecology and evolution.","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"64 1","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141168881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-14eCollection Date: 2024-01-01DOI: 10.1093/ve/veae038
[This corrects the article DOI: 10.1093/ve/veae019.].
[此处更正了文章 DOI：10.1093/ve/veae019]。
{"title":"Correction to: Optimized SMRT-UMI protocol produces highly accurate sequence datasets from diverse populations-Application to HIV-1 quasispecies.","authors":"","doi":"10.1093/ve/veae038","DOIUrl":"https://doi.org/10.1093/ve/veae038","url":null,"abstract":"<p><p>[This corrects the article DOI: 10.1093/ve/veae019.].</p>","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"10 1","pages":"veae038"},"PeriodicalIF":5.3,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11099541/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141066403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Danae Stephens, Zahra Faghihi, Mohammad Moniruzzaman
: Stony corals (Order Scleractinia) are central to vital marine habitats known as coral reefs. Numerous stressors in the Anthropocene are contributing to the ongoing decline in coral reef health and coverage. While viruses are established modulators of marine microbial dynamics, their interactions within the coral holobiont and impact on coral health and physiology remain unclear. To address this key knowledge gap, we investigated diverse stony coral genomes for ‘endogenous’ viruses. Our study uncovered a remarkable number of integrated viral elements recognized as ‘Polintoviruses’ (Class Polintoviricetes) in 30 Scleractinia genomes; with several species harboring hundreds to thousands of polintoviruses. We reveal massive paralogous expansion of polintoviruses in stony coral genomes, alongside presence of integrated elements closely related to Polinton-like viruses (PLVs), a group of viruses that exist as free virions. These results suggest multiple integrations of polintoviruses and PLV-relatives, along with paralogous expansions, shaped stony coral genomes. Re-analysis of existing gene expression data reveals all polintovirus structural and non-structural hallmark genes are expressed, providing support for free virion production from polintoviruses. Our results, revealing a significant diversity of polintovirus across the Scleractinia order, open a new research avenue into polintovirus and their possible roles in disease, genomic plasticity, and environmental adaptation in this key group of organisms.
{"title":"Widespread occurrence and diverse origins of polintoviruses influence lineage-specific genome dynamics in stony corals","authors":"Danae Stephens, Zahra Faghihi, Mohammad Moniruzzaman","doi":"10.1093/ve/veae039","DOIUrl":"https://doi.org/10.1093/ve/veae039","url":null,"abstract":": Stony corals (Order Scleractinia) are central to vital marine habitats known as coral reefs. Numerous stressors in the Anthropocene are contributing to the ongoing decline in coral reef health and coverage. While viruses are established modulators of marine microbial dynamics, their interactions within the coral holobiont and impact on coral health and physiology remain unclear. To address this key knowledge gap, we investigated diverse stony coral genomes for ‘endogenous’ viruses. Our study uncovered a remarkable number of integrated viral elements recognized as ‘Polintoviruses’ (Class Polintoviricetes) in 30 Scleractinia genomes; with several species harboring hundreds to thousands of polintoviruses. We reveal massive paralogous expansion of polintoviruses in stony coral genomes, alongside presence of integrated elements closely related to Polinton-like viruses (PLVs), a group of viruses that exist as free virions. These results suggest multiple integrations of polintoviruses and PLV-relatives, along with paralogous expansions, shaped stony coral genomes. Re-analysis of existing gene expression data reveals all polintovirus structural and non-structural hallmark genes are expressed, providing support for free virion production from polintoviruses. Our results, revealing a significant diversity of polintovirus across the Scleractinia order, open a new research avenue into polintovirus and their possible roles in disease, genomic plasticity, and environmental adaptation in this key group of organisms.","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"23 1","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140932564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purav Gupta, Aiden Hiller, Jawad Chowdhury, Declan Lim, Dillon Yee Lim, Jeroen P J Saeij, Artem Babaian, Felipe Rodriguez, Luke Pereira, Alex Morales
We are entering a “Platinum Age of Virus Discovery”, an era marked by exponential growth in the discovery of virus biodiversity, and driven by advances in metagenomics and computational analysis. In the ecosystem of a human (or any animal) there are more species of viruses than simply those directly infecting the animal cells. Viruses can infect all organisms constituting the microbiome, including bacteria, fungi, and unicellular parasites. Thus the complexity of possible interactions between host, microbe, and viruses is unfathomable. To understand this interaction network we must employ computationally-assisted virology as a means of analyzing and interpreting the millions of available samples to make inferences about the ways in which viruses may intersect human health. From a computational viral screen of human neuronal datasets, we identified a novel narnavirus Apocryptovirus odysseus (Ao) which likely infects the neurotropic parasite Toxoplasma gondii. Previously, several parasitic protozoan viruses (PPVs) have been mechanistically established as triggers of host innate responses, and here we present in silico evidence that Ao is a plausible pro-inflammatory factor in human and mouse cells infected by T. gondii. T. gondii infects billions of people worldwide, yet the prognosis of toxoplasmosis disease is highly variable, and PPVs like Ao could function as a hitherto undescribed hypervirulence factor. In a broader screen of over 7.6 million samples, we explored phylogenetically-proximal viruses to Ao and discovered 19 Apocryptovirus species, all found in libraries annotated as vertebrate transcriptome or metatranscriptomes. While samples containing this genus of narnaviruses are derived from sheep, goat, bat, rabbit, chicken, and pigeon samples, the presence of virus is strongly predictive of parasitic Apicomplexa nucleic acid co-occurrence, supporting that Apocryptovirus is a genus of parasite-infecting viruses. This is a computational proof-of-concept study in which we rapidly analyze millions of datasets from which we distilled a mechanistically, ecologically, and phylogenetically refined hypothesis. We predict this highly diverged Ao RNA virus is biologically a T. gondii infection, and that Ao, and other viruses like it, will modulate this disease which afflicts billions worldwide.
我们正在进入一个 "病毒发现的白金时代"，这个时代的特点是病毒生物多样性的发现呈指数级增长，并受到元基因组学和计算分析技术进步的推动。在人类（或任何动物）的生态系统中，有更多种类的病毒，而不仅仅是那些直接感染动物细胞的病毒。病毒可以感染构成微生物组的所有生物，包括细菌、真菌和单细胞寄生虫。因此，宿主、微生物和病毒之间可能发生的相互作用的复杂性是深不可测的。要了解这一相互作用网络，我们必须采用计算辅助病毒学作为分析和解释数百万个可用样本的手段，从而推断病毒可能与人类健康产生交集的方式。通过对人类神经元数据集进行计算病毒筛选，我们发现了一种新型纳尼亚病毒 Apocryptovirus odysseus（Ao），它可能会感染神经寄生虫弓形虫。在此之前，几种寄生原生动物病毒（PPVs）已经从机理上被确定为宿主先天性反应的触发器，我们在此提出的硅学证据表明，Ao 在感染弓形虫的人类和小鼠细胞中是一种可信的促炎因子。淋病双球菌感染了全球数十亿人，但弓形虫病的预后却千差万别，而像 Ao 这样的 PPV 可作为一种迄今尚未描述过的高病毒性因子发挥作用。在对 760 多万个样本进行的更广泛筛选中，我们探索了 Ao 的系统发育近缘病毒，发现了 19 种 Apocryptovirus，它们都出现在注释为脊椎动物转录组或元转录组的文库中。虽然含有该纳尼亚病毒属的样本来自绵羊、山羊、蝙蝠、兔子、鸡和鸽子样本，但病毒的存在可强烈预测寄生虫Apicomplexa核酸共存情况，从而支持Apocryptovirus是寄生虫感染病毒属。这是一项计算概念验证研究，我们在其中快速分析了数百万个数据集，从中提炼出了一个从机制、生态学和系统发育角度加以完善的假说。我们预测，这种高度分化的 Ao RNA 病毒在生物学上是一种淋球菌感染，Ao 和其他类似病毒将调节这种困扰全球数十亿人的疾病。
{"title":"A Parasite Odyssey: An RNA virus concealed in Toxoplasma gondii","authors":"Purav Gupta, Aiden Hiller, Jawad Chowdhury, Declan Lim, Dillon Yee Lim, Jeroen P J Saeij, Artem Babaian, Felipe Rodriguez, Luke Pereira, Alex Morales","doi":"10.1093/ve/veae040","DOIUrl":"https://doi.org/10.1093/ve/veae040","url":null,"abstract":"We are entering a “Platinum Age of Virus Discovery”, an era marked by exponential growth in the discovery of virus biodiversity, and driven by advances in metagenomics and computational analysis. In the ecosystem of a human (or any animal) there are more species of viruses than simply those directly infecting the animal cells. Viruses can infect all organisms constituting the microbiome, including bacteria, fungi, and unicellular parasites. Thus the complexity of possible interactions between host, microbe, and viruses is unfathomable. To understand this interaction network we must employ computationally-assisted virology as a means of analyzing and interpreting the millions of available samples to make inferences about the ways in which viruses may intersect human health. From a computational viral screen of human neuronal datasets, we identified a novel narnavirus Apocryptovirus odysseus (Ao) which likely infects the neurotropic parasite Toxoplasma gondii. Previously, several parasitic protozoan viruses (PPVs) have been mechanistically established as triggers of host innate responses, and here we present in silico evidence that Ao is a plausible pro-inflammatory factor in human and mouse cells infected by T. gondii. T. gondii infects billions of people worldwide, yet the prognosis of toxoplasmosis disease is highly variable, and PPVs like Ao could function as a hitherto undescribed hypervirulence factor. In a broader screen of over 7.6 million samples, we explored phylogenetically-proximal viruses to Ao and discovered 19 Apocryptovirus species, all found in libraries annotated as vertebrate transcriptome or metatranscriptomes. While samples containing this genus of narnaviruses are derived from sheep, goat, bat, rabbit, chicken, and pigeon samples, the presence of virus is strongly predictive of parasitic Apicomplexa nucleic acid co-occurrence, supporting that Apocryptovirus is a genus of parasite-infecting viruses. This is a computational proof-of-concept study in which we rapidly analyze millions of datasets from which we distilled a mechanistically, ecologically, and phylogenetically refined hypothesis. We predict this highly diverged Ao RNA virus is biologically a T. gondii infection, and that Ao, and other viruses like it, will modulate this disease which afflicts billions worldwide.","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"66 1","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140932749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fabiana Gambaro, Ralf Duerr, Dacia Dimartino, Christian Marier, Eduardo Iturrate, Mark J Mulligan, Adriana Heguy, Simon Dellicour
The recombinant SARS-CoV-2 Omicron XBB.1.5 variant was first detected in New York City (NYC) and rapidly became the predominant variant in the area by early 2023. The increased occurrence of circulating variants within the SARS-CoV-2 XBB-sublineage prompted the modification of COVID-19 mRNA vaccines by Moderna and Pfizer-BioNTech. This update, implemented in mid-September 2023, involved the incorporation of a monovalent XBB.1.5 component. Considering that NYC probably played a central role in the emergence of the XBB.1.5 variant, we conducted phylogeographic analysis to investigate the emergence and spread of this variant in the metropolitan area. Our analysis confirms that XBB.1.5 emerged within or near the NYC area and indicates that XBB.1.5 had a diffusion velocity similar to that of the variant Alpha in the same study area. Additionally, the analysis of 2,392 genomes collected in the context of the genomic surveillance program at NYU Langone Health system (NYULH) showed that there was no increased proportion of XBB.1.5, relative to all cocirculating variants, in the boosted compared to unvaccinated individuals. This study provides a comprehensive description of the emergence and dissemination of XBB.1.5.
{"title":"Emergence and dissemination of SARS-CoV-2 XBB.1.5 in New York","authors":"Fabiana Gambaro, Ralf Duerr, Dacia Dimartino, Christian Marier, Eduardo Iturrate, Mark J Mulligan, Adriana Heguy, Simon Dellicour","doi":"10.1093/ve/veae035","DOIUrl":"https://doi.org/10.1093/ve/veae035","url":null,"abstract":"The recombinant SARS-CoV-2 Omicron XBB.1.5 variant was first detected in New York City (NYC) and rapidly became the predominant variant in the area by early 2023. The increased occurrence of circulating variants within the SARS-CoV-2 XBB-sublineage prompted the modification of COVID-19 mRNA vaccines by Moderna and Pfizer-BioNTech. This update, implemented in mid-September 2023, involved the incorporation of a monovalent XBB.1.5 component. Considering that NYC probably played a central role in the emergence of the XBB.1.5 variant, we conducted phylogeographic analysis to investigate the emergence and spread of this variant in the metropolitan area. Our analysis confirms that XBB.1.5 emerged within or near the NYC area and indicates that XBB.1.5 had a diffusion velocity similar to that of the variant Alpha in the same study area. Additionally, the analysis of 2,392 genomes collected in the context of the genomic surveillance program at NYU Langone Health system (NYULH) showed that there was no increased proportion of XBB.1.5, relative to all cocirculating variants, in the boosted compared to unvaccinated individuals. This study provides a comprehensive description of the emergence and dissemination of XBB.1.5.","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"36 1","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140932492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Danyil Grybchuk, Arnau Galan, Donnamae Klocek, Diego H Macedo, Yuri I Wolf, Jan Votýpka, Anzhelika Butenko, Julius Lukeš, Uri Neri, Kristína Záhonová, Alexei Yu Kostygov, Eugene V Koonin, Vyacheslav Yurchenko
Trypanosomatids (Euglenozoa) are a diverse group of unicellular flagellates predominately infecting insects (monoxenous species) or circulating between insects and vertebrates or plants (dixenous species). Monoxenous trypanosomatids harbor a wide range of RNA viruses belonging to the families Narnaviridae, Totiviridae, and Qinviridae, a putative group of tombus-like viruses. Here, we focus on the subfamily Blastocrithidiinae, a previously unexplored divergent group of monoxenous trypanosomatids comprising two related genera: Obscuromonas and Blastocrithidia. Members of the genus Blastocrithidia employ a unique genetic code, in which all three stop-codons are repurposed to encode amino acids, with TAA also used to terminate translation. Obscuromonas isolates studied here bear viruses of three families: Narnaviridae, Qinviridae, and Mitoviridae. The latter viral group is documented in trypanosomatid flagellates for the first time. While other known mitoviruses replicate in the mitochondria, those of trypanosomatids appear to reside in the cytoplasm. Although no RNA viruses were detected in Blastocrithidia spp. we identified an endogenous viral element in the genome of B. triatomae indicating its past encounter(s) with tombus-like viruses.
{"title":"Identification of diverse RNA viruses in Obscuromonas flagellates (Euglenozoa: Trypanosomatidae: Blastocrithidiinae)","authors":"Danyil Grybchuk, Arnau Galan, Donnamae Klocek, Diego H Macedo, Yuri I Wolf, Jan Votýpka, Anzhelika Butenko, Julius Lukeš, Uri Neri, Kristína Záhonová, Alexei Yu Kostygov, Eugene V Koonin, Vyacheslav Yurchenko","doi":"10.1093/ve/veae037","DOIUrl":"https://doi.org/10.1093/ve/veae037","url":null,"abstract":"Trypanosomatids (Euglenozoa) are a diverse group of unicellular flagellates predominately infecting insects (monoxenous species) or circulating between insects and vertebrates or plants (dixenous species). Monoxenous trypanosomatids harbor a wide range of RNA viruses belonging to the families Narnaviridae, Totiviridae, and Qinviridae, a putative group of tombus-like viruses. Here, we focus on the subfamily Blastocrithidiinae, a previously unexplored divergent group of monoxenous trypanosomatids comprising two related genera: Obscuromonas and Blastocrithidia. Members of the genus Blastocrithidia employ a unique genetic code, in which all three stop-codons are repurposed to encode amino acids, with TAA also used to terminate translation. Obscuromonas isolates studied here bear viruses of three families: Narnaviridae, Qinviridae, and Mitoviridae. The latter viral group is documented in trypanosomatid flagellates for the first time. While other known mitoviruses replicate in the mitochondria, those of trypanosomatids appear to reside in the cytoplasm. Although no RNA viruses were detected in Blastocrithidia spp. we identified an endogenous viral element in the genome of B. triatomae indicating its past encounter(s) with tombus-like viruses.","PeriodicalId":56026,"journal":{"name":"Virus Evolution","volume":"18 1","pages":""},"PeriodicalIF":5.3,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140886049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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