Citation: Secoviridae

A summary of this ICTV Report chapter has been published as an ICTV Virus Taxonomy Profile article in the Journal of General Virology, and should be cited when referencing this online chapter as follows:

References: Secoviridae

Amari, K., A. Lerich, C. Schmitt-Keichinger, V. V. Dolja and C. Ritzenthaler (2011). Tubule-guided cell-to-cell movement of a plant virus requires class XI myosin motors. PLoS Pathog 7: e1002327. [PubMed]

Resources: Secoviridae

Sequence alignments and tree files:

Figure 4 Secoviridae:

Tree file (Newick format)

Alignment file (FASTA format)

Authors: Secoviridae

Marc Fuchs*
Secoviridae Study Group Chair
School of Integrative Plant Science
Cornell University
New York State Agricultural Experiment Station
Geneva, NY 14456, USA      
E-mail: [email protected]

Subfamily: Comovirinae

Genus: Nepovirus

Distinguishing features

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.

Subfamily: Comovirinae

Genus: Fabavirus

Distinguishing features

Fabaviruses have bipartite genomes encapsidated by two capsid proteins (CP) and are transmitted by aphids.

Virion

See discussion under family description.

Subfamily: Comovirinae

Genus: Comovirus

Distinguishing features

Comoviruses have bipartite genomes encapsidated by two capsid proteins (CP); these viruses are transmitted by beetles.

Virion

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.

Family: Secoviridae

Genus: Waikavirus

Distinguishing features

Waikaviruses have a monopartite genome encapsidated by three capsid proteins; these viruses are transmitted by aphids or leafhoppers. 

Virion

See discussion under family description. 

Family: Secoviridae

Genus: Sequivirus

Distinguishing features

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.

Virion

Virions contain three CPs of about 32–34, 22–26 and 22–24 kDa.

Family: Secoviridae

Genus: Torradovirus

Distinguishing features

Similar to cheraviruses, torradoviruses have a bipartite genome with two open reading frames in RNA2 and three capsid proteins. 

Virion

See discussion under family description.