Nepoviruses are the only known members of the family that encode a single large capsid protein (CP) of 52–60 kDa (Fuchs et al., 2017). These viruses are transmitted by nematode vectors and through pollen.
Fabaviruses have bipartite genomes encapsidated by two capsid proteins (CP) and are transmitted by aphids.
See discussion under family description.
Comoviruses have bipartite genomes encapsidated by two capsid proteins (CP); these viruses are transmitted by beetles.
The comovirus capsid is made of two types of polypeptides (large CP: 40–45 kDa and small CP: 21–27 kDa). The small CP suppresses RNA silencing and surface-exposed amino acids are required for this function.
Waikaviruses have a monopartite genome encapsidated by three capsid proteins; these viruses are transmitted by aphids or leafhoppers.
See discussion under family description.
Sequiviruses have a monopartite genome and three capsid proteins (CP) in their virions; sequiviruses are transmitted by aphids in the presence of a helper virus.
Virions contain three CPs of about 32–34, 22–26 and 22–24 kDa.
Similar to cheraviruses, torradoviruses have a bipartite genome with two open reading frames in RNA2 and three capsid proteins.
See discussion under family description.
Members of the genus Cheravirus have bipartite genomes and encode three capsid proteins and are transmitted by nematodes and through seeds.
See discussion under family description.
Marc Fuchs, Jean-Michel Hily, Karel Petrzik, Hélène Sanfaçon, Jeremy R. Thompson, René van der Vlugt and Thierry Wetzel
The citation for this ICTV Report chapter is the summary published as Fuchs M, Hily JM, Petrzik K, Sanfaçon H, Thompson JR, van der Vlugt R, Wetzel T. and ICTV Report Consortium (2022):
ICTV Virus Taxonomy Profile: Secoviridae 2022, Journal of General Virology (2022) 103:001807
