TY - JOUR
T1 - Naryaviridae, Nenyaviridae, and Vilyaviridae
T2 - three new families of single-stranded DNA viruses in the phylum Cressdnaviricota
AU - Krupovic, Mart
AU - Varsani, Arvind
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.
PY - 2022/12
Y1 - 2022/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85138067018&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85138067018&partnerID=8YFLogxK
U2 - 10.1007/s00705-022-05557-w
DO - 10.1007/s00705-022-05557-w
M3 - Article
C2 - 36098801
AN - SCOPUS:85138067018
SN - 0304-8608
VL - 167
SP - 2907
EP - 2921
JO - Archives of virology
JF - Archives of virology
IS - 12
ER -