Family: Marnaviridae
Genus: Sogarnavirus
Distinguishing features
Members of the genus form a separate clade from other members of the family upon phylogenetic analysis of RNA-directed RNA polymerase amino acid sequences.
Virion
Morphology
The structures of the capsid proteins and virion have been characterized for the virus Chaetoceros tenuissimus RNA virus type II (CtenRNAVII, species Chaetenuissarnavirus II) (Figure 1. Marnaviridae) (Munke et al., 2020). The VP1 protein has a unique surface loop that has not been previously observed in related invertebrate and vertebrate viruses. The characteristic VP1 “canyon” feature is obscured by another VP1 loop of the same protein and the VP2 protein has an N-terminal tail.
Genome organization and replication
The current members have di-cistronic genomes (Figure 2. Marnaviridae). See discussion under family description.
Biology
See discussion under family description.
Species demarcation criteria
Species demarcation cut-offs are based on pairwise comparisons of the RdRP and capsid amino acid sequences. The cut-offs are 90% identity for the RdRP and 75% identity for the capsid. The phylogenetic relationship of classified virus isolates and numerous unclassified viruses is shown in Figrue 1. Sogarnavirus.
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Figrue 1. Sogarnavirus. Maximum likelihood tree of sogarnavirus RdRP amino sequences. The tree was produced using the JTT model with a gamma distribution of frequencies and invariant sites. Bootstrap values are shown where they were over 70%. Tips are labelled with filled circles for members of species; open circles represent unclassified viruses. Heterosigma akashiwo RNA virus (AY337486) was used as an outgroup. This phylogenetic tree and corresponding sequence alignment are available to download from the Resources page. |
Member species
The Member Species table enumerating important virus exemplars classified under each species of the genus is provided at the bottom of the page.
Related, unclassified viruses
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Virus name |
Accession number |
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Antarctic picorna-like virus 2 |
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Beihai picorna-like virus 1 strain BHTSS18000 |
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Beihai picorna-like virus 1 strain BHNXC41230 |
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Beihai picorna-like virus 1 strain BHBJDX18697 |
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Beihai picorna-like virus 1 strain BHZC36988 |
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Beihai picorna-like virus 1 strain SCJXSX39332 |
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Beihai picorna-like virus 1 strain BHJJX25883 |
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Beihai picorna-like virus 4 |
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Beihai picorna-like virus 5 |
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Beihai picorna-like virus 7 |
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Beihai picorna-like virus 6 strain BHNXC41284 |
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Beihai picorna-like virus 6 strain BHZC37373 |
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Beihai picorna-like virus 9 |
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Beihai picorna-like virus 8 |
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Beihai picorna-like virus 11 |
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Beihai picorna-like virus 13 |
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Beihai picorna-like virus 14 |
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Beihai picorna-like virus 15 strain BZL81977 |
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Beihai picorna-like virus 15 strain BHZY59344 |
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Beihai picorna-like virus 15 strain BHXun32793 |
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Beihai picorna-like virus 15 strain BHZC36638 |
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Beihai picorna-like virus 15 strain BHXG24735 |
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Beihai picorna-like virus 15 strain YYSZX17489 |
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Beihai picorna-like virus 15 strain HWRTX12823 |
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Beihai picorna-like virus 15 strain BHTSS17870 |
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Beihai picorna-like virus 15 strain BHWZXX15642 |
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Beihai picorna-like virus 15 strain BHNXC41227 |
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Beihai picorna-like virus 15 strain BHJJX25823 |
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Beihai picorna-like virus 15 strain BHBJDX18577 |
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Beihai picorna-like virus 15 strain BWBFG37850 |
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Beihai picorna-like virus 15 strain BHCL77416 |
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Wenzhou picorna-like virus 1 |
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Wenzhou picorna-like virus 2 strain beimix73672 |
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Wenzhou picorna-like virus 2 strain WZSBei58345 |
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Wenzhou picorna-like virus 50 |
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Wenzhou picorna-like virus 52 |
Virus names and virus abbreviations are not official ICTV designations.