Strain-level diversity of giant viruses infecting chlorarachniophyte algae in the subtropical North Pacific.
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| Auteurs principaux: | , , , , , , , , , , , , , , , , |
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| Format: | Artículo científico |
| Langue: | en |
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The ISME journal
2026
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| author | Schön, Max Emil Schvarcz, Christopher R Malkewitz, Silja V Hinner, Fanny C Koslová, Anna Mersdorf, Ulrike Schimm, Fiona Rickert, Sebastian Pozhydaieva, Nadiia McBeain, Kelsey Hackl, Thomas Schneider, Alina Cosima Barenhoff, Karina Höfer, Katharina Edwards, Kyle F Steward, Grieg F Fischer, Matthias G |
| author_facet | Schön, Max Emil Schvarcz, Christopher R Malkewitz, Silja V Hinner, Fanny C Koslová, Anna Mersdorf, Ulrike Schimm, Fiona Rickert, Sebastian Pozhydaieva, Nadiia McBeain, Kelsey Hackl, Thomas Schneider, Alina Cosima Barenhoff, Karina Höfer, Katharina Edwards, Kyle F Steward, Grieg F Fischer, Matthias G Schön, Max Emil Schvarcz, Christopher R Malkewitz, Silja V Hinner, Fanny C Koslová, Anna Mersdorf, Ulrike Schimm, Fiona Rickert, Sebastian Pozhydaieva, Nadiia McBeain, Kelsey Hackl, Thomas Schneider, Alina Cosima Barenhoff, Karina Höfer, Katharina Edwards, Kyle F Steward, Grieg F Fischer, Matthias G |
| collection | PubMed - marine biology |
| contents | Strain-level diversity of giant viruses infecting chlorarachniophyte algae in the subtropical North Pacific. Schön, Max Emil Schvarcz, Christopher R Malkewitz, Silja V Hinner, Fanny C Koslová, Anna Mersdorf, Ulrike Schimm, Fiona Rickert, Sebastian Pozhydaieva, Nadiia McBeain, Kelsey Hackl, Thomas Schneider, Alina Cosima Barenhoff, Karina Höfer, Katharina Edwards, Kyle F Steward, Grieg F Fischer, Matthias G Genome, Viral Giant Viruses Phylogeny Hawaii Cercozoa Genetic Variation Microalgae DNA Methylation Pacific Ocean Methyltransferases DNA, Viral Giant DNA viruses are ubiquitous among unicellular eukaryotes and occur in marine, freshwater, and terrestrial environments. Despite intense metagenomic data mining, their strain-level diversity remains largely unexplored. Here we introduce a model system comprising four isolates of a giant virus called ChlorV, which infects marine microalgae of the class Chlorarachniophyceae (Rhizaria) from station ALOHA, Hawai'i. The ChlorV genomes are 469 kbp to 493 kbp long and encode approximately 400 proteins, at least 106 of which are present in purified virions. Although the four viral genomes are highly syntenic, they differ by several insertions and deletions that often encode methyltransferases. We found that some of these methyltransferase genes correlated with specific DNA methylation patterns in the same ChlorV strain. Our study describes the first giant viruses infecting the eukaryotic supergroup Rhizaria and demonstrates how viral strain-level variation in gene content and epigenetic features may affect eco-evolutionary processes in marine microalgae. |
| format | Artículo científico |
| id | pubmed_41989131 |
| institution | PubMed |
| language | en |
| publishDate | 2026 |
| publisher | The ISME journal |
| record_format | pubmed |
| spellingShingle | Strain-level diversity of giant viruses infecting chlorarachniophyte algae in the subtropical North Pacific. Schön, Max Emil Schvarcz, Christopher R Malkewitz, Silja V Hinner, Fanny C Koslová, Anna Mersdorf, Ulrike Schimm, Fiona Rickert, Sebastian Pozhydaieva, Nadiia McBeain, Kelsey Hackl, Thomas Schneider, Alina Cosima Barenhoff, Karina Höfer, Katharina Edwards, Kyle F Steward, Grieg F Fischer, Matthias G Genome, Viral Giant Viruses Phylogeny Hawaii Cercozoa Genetic Variation Microalgae DNA Methylation Pacific Ocean Methyltransferases DNA, Viral Strain-level diversity of giant viruses infecting chlorarachniophyte algae in the subtropical North Pacific. Schön, Max Emil Schvarcz, Christopher R Malkewitz, Silja V Hinner, Fanny C Koslová, Anna Mersdorf, Ulrike Schimm, Fiona Rickert, Sebastian Pozhydaieva, Nadiia McBeain, Kelsey Hackl, Thomas Schneider, Alina Cosima Barenhoff, Karina Höfer, Katharina Edwards, Kyle F Steward, Grieg F Fischer, Matthias G Genome, Viral Giant Viruses Phylogeny Hawaii Cercozoa Genetic Variation Microalgae DNA Methylation Pacific Ocean Methyltransferases DNA, Viral Giant DNA viruses are ubiquitous among unicellular eukaryotes and occur in marine, freshwater, and terrestrial environments. Despite intense metagenomic data mining, their strain-level diversity remains largely unexplored. Here we introduce a model system comprising four isolates of a giant virus called ChlorV, which infects marine microalgae of the class Chlorarachniophyceae (Rhizaria) from station ALOHA, Hawai'i. The ChlorV genomes are 469 kbp to 493 kbp long and encode approximately 400 proteins, at least 106 of which are present in purified virions. Although the four viral genomes are highly syntenic, they differ by several insertions and deletions that often encode methyltransferases. We found that some of these methyltransferase genes correlated with specific DNA methylation patterns in the same ChlorV strain. Our study describes the first giant viruses infecting the eukaryotic supergroup Rhizaria and demonstrates how viral strain-level variation in gene content and epigenetic features may affect eco-evolutionary processes in marine microalgae. |
| title | Strain-level diversity of giant viruses infecting chlorarachniophyte algae in the subtropical North Pacific. |
| topic | Genome, Viral Giant Viruses Phylogeny Hawaii Cercozoa Genetic Variation Microalgae DNA Methylation Pacific Ocean Methyltransferases DNA, Viral |
| url | https://pubmed.ncbi.nlm.nih.gov/41989131/ |