Hybrid sequencing reveals the genome of a Chrysochromulina parva virus and highlight its distinct replication strategy
Abstract Chrysochromulina parva (C. parva) is a eukaryotic freshwater haptophyte algae found in lakes and rivers worldwide. It is known to be infected by viruses, yet knowledge of the diversity and activity of these viruses is still very limited. Based on sequences of PCR-amplified DNA polymerase B...
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2025-05-01
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| Series: | BMC Genomics |
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| Online Access: | https://doi.org/10.1186/s12864-025-11700-z |
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| author | Delaney Nash Christine N. Palermo Ichiro Inamoto Trevor C. Charles Jozef I. Nissimov Steven M. Short |
| author_facet | Delaney Nash Christine N. Palermo Ichiro Inamoto Trevor C. Charles Jozef I. Nissimov Steven M. Short |
| author_sort | Delaney Nash |
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| description | Abstract Chrysochromulina parva (C. parva) is a eukaryotic freshwater haptophyte algae found in lakes and rivers worldwide. It is known to be infected by viruses, yet knowledge of the diversity and activity of these viruses is still very limited. Based on sequences of PCR-amplified DNA polymerase B (polB) gene fragments, Chrysochromulina parva virus BQ1 (CpV-BQ1) was the first known lytic agent of C. parva, and was considered a member of the virus family Phycodnaviridae, order Algavirales. However, the genome of a different C. parva-infecting virus (CpV-BQ2, or Tethysvirus ontarioense) from another virus family, the Mesomimiviridae, order Imitervirales, was the first sequenced. Here, we report the complete genome sequence of the putative phycodnavirus CpV-BQ1, accession PQ783904. The complete CpV-BQ1 genome sequence is 165,454 bp with a GC content of 32.32% and it encodes 193 open reading frames. Phylogenetic analyses of several virus hallmark genes including the polB, the late gene transcription factor (VLTF-3), and the putative A32-like virion packaging ATPase (Viral A32) all demonstrate that CpV-BQ1 is most closely related to other viruses in the phylum Megaviricetes within the order Algavirales, family Phycodnaviridae. |
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| id | doaj-art-729ed41368854f5cbf7e4e57dabee8ab |
| institution | OA Journals |
| issn | 1471-2164 |
| language | English |
| publishDate | 2025-05-01 |
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| series | BMC Genomics |
| spelling | doaj-art-729ed41368854f5cbf7e4e57dabee8ab2025-08-20T01:51:59ZengBMCBMC Genomics1471-21642025-05-0126112110.1186/s12864-025-11700-zHybrid sequencing reveals the genome of a Chrysochromulina parva virus and highlight its distinct replication strategyDelaney Nash0Christine N. Palermo1Ichiro Inamoto2Trevor C. Charles3Jozef I. Nissimov4Steven M. Short5Department of Biology, University of WaterlooDepartment of Biology, University of Toronto MississaugaDepartment of Biology, University of Toronto MississaugaDepartment of Biology, University of WaterlooDepartment of Biology, University of WaterlooDepartment of Biology, University of Toronto MississaugaAbstract Chrysochromulina parva (C. parva) is a eukaryotic freshwater haptophyte algae found in lakes and rivers worldwide. It is known to be infected by viruses, yet knowledge of the diversity and activity of these viruses is still very limited. Based on sequences of PCR-amplified DNA polymerase B (polB) gene fragments, Chrysochromulina parva virus BQ1 (CpV-BQ1) was the first known lytic agent of C. parva, and was considered a member of the virus family Phycodnaviridae, order Algavirales. However, the genome of a different C. parva-infecting virus (CpV-BQ2, or Tethysvirus ontarioense) from another virus family, the Mesomimiviridae, order Imitervirales, was the first sequenced. Here, we report the complete genome sequence of the putative phycodnavirus CpV-BQ1, accession PQ783904. The complete CpV-BQ1 genome sequence is 165,454 bp with a GC content of 32.32% and it encodes 193 open reading frames. Phylogenetic analyses of several virus hallmark genes including the polB, the late gene transcription factor (VLTF-3), and the putative A32-like virion packaging ATPase (Viral A32) all demonstrate that CpV-BQ1 is most closely related to other viruses in the phylum Megaviricetes within the order Algavirales, family Phycodnaviridae.https://doi.org/10.1186/s12864-025-11700-zPhycodnaviridaeAlgaviralesdsDNA virusAlgal virusesHaptophytePrymnesiophyte |
| spellingShingle | Delaney Nash Christine N. Palermo Ichiro Inamoto Trevor C. Charles Jozef I. Nissimov Steven M. Short Hybrid sequencing reveals the genome of a Chrysochromulina parva virus and highlight its distinct replication strategy BMC Genomics Phycodnaviridae Algavirales dsDNA virus Algal viruses Haptophyte Prymnesiophyte |
| title | Hybrid sequencing reveals the genome of a Chrysochromulina parva virus and highlight its distinct replication strategy |
| title_full | Hybrid sequencing reveals the genome of a Chrysochromulina parva virus and highlight its distinct replication strategy |
| title_fullStr | Hybrid sequencing reveals the genome of a Chrysochromulina parva virus and highlight its distinct replication strategy |
| title_full_unstemmed | Hybrid sequencing reveals the genome of a Chrysochromulina parva virus and highlight its distinct replication strategy |
| title_short | Hybrid sequencing reveals the genome of a Chrysochromulina parva virus and highlight its distinct replication strategy |
| title_sort | hybrid sequencing reveals the genome of a chrysochromulina parva virus and highlight its distinct replication strategy |
| topic | Phycodnaviridae Algavirales dsDNA virus Algal viruses Haptophyte Prymnesiophyte |
| url | https://doi.org/10.1186/s12864-025-11700-z |
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