Naryaviridae, Nenyaviridae, and Vilyaviridae: three new families of single-stranded DNA viruses in the phylum Cressdnaviricota

Autor: Mart Krupovic, Arvind Varsani
Přispěvatelé: Virologie des archées - Archaeal Virology, Université Paris Cité (UPCité)-Microbiologie Intégrative et Moléculaire (UMR6047), Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Arizona State University [Tempe] (ASU), University of Cape Town
Rok vydání: 2022
Předmět:
Zdroj: Archives of Virology
Archives of Virology, 2022, 167 (12), pp.2907-2921. ⟨10.1007/s00705-022-05557-w⟩
ISSN: 1432-8798
0304-8608
DOI: 10.1007/s00705-022-05557-w⟩
Popis: International audience; The phylum Cressdnaviricota includes viruses with circular single-stranded DNA (ssDNA) genomes and icosahedral capsids. These viruses display global environmental distribution and infect diverse eukaryotic hosts, including animals, plants, and fungi. Here, we report on the formal creation of two new orders, Rivendellvirales and Rohanvirales, and three new families, Naryaviridae, Nenyaviridae, and Vilyaviridae, of ssDNA viruses associated with protozoan parasites belonging to the genera Entamoeba and Giardia. We describe a sequence-based taxonomic framework, which was used to classify 60 ssDNA viruses into 12 genera (with 18 species) within the family Vilyaviridae; four genera (with five species) within the family Naryaviridae; and five genera (with six species) within the family Nenyaviridae. We also highlight the challenges associated with the classification of chimeric virus genomes, such as those in the families Naryaviridae and Nenyaviridae, where the replication initiation and capsid protein genes have undergone several independent non-orthologous replacements. The described taxonomic changes have been ratified by the International Committee on Taxonomy of Viruses (ICTV) and expand the phylum Cressdnaviricota to eight orders and 11 families.
Databáze: OpenAIRE
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