Hadakaviridae

The ICTV Report on the family Hadakaviridae is now available

Hadakaviridae is a family of capsidless positive-sense (+) single-stranded RNA viruses with a genome composed of ten or eleven segments (Table 1.Hadakaviridae). “Hadaka”, meaning “naked” in Japanese and used to name the virus family, describes their unusual capsidless natures. The lack of a capsid means that these viruses cannot be pelleted by conventional ultracentrifugation and their genome and replicative form double-stranded RNAs are susceptible to exogenously added ribonuclease in host tissue homogenates. Currently known hosts are ascomycetous filamentous fungi. Hadakavirids are most closely related to members of the family Polymycoviridae and show phylogenetic affinity to (+) RNA viruses in the phylum Pisuviricota (extended “picornavirus supergroup”).