Secoviridae: a proposed family of plant viruses within the order Picornavirales that combines the families Sequiviridae and Comoviridae, the unassigned genera Cheravirus and Sadwavirus, and the proposed genus Torradovirus

H. Sanfacon, J. Wellink, O. Le Gall, A. Karasev, R.A.A. van der Vlugt, T. Wetzel

Research output: Contribution to journalArticleAcademicpeer-review

140 Citations (Scopus)

Abstract

The order Picornavirales includes several plant viruses that are currently classified into the families Comoviridae (genera Comovirus, Fabavirus and Nepovirus) and Sequiviridae (genera Sequivirus and Waikavirus) and into the unassigned genera Cheravirus and Sadwavirus. These viruses share properties in common with other picornavirales (particle structure, positive-strand RNA genome with a polyprotein expression strategy, a common replication block including type III helicase, a 3C-like cysteine proteinase and type I RNA-dependent RNA polymerase). However, they also share unique properties that distinguish them from other picornavirales. They infect plants and use specialized proteins or protein domains to move through their host. In phylogenetic analysis based on their replication proteins, these viruses form a separate distinct lineage within the picornavirales branch. To recognize these common properties at the taxonomic level, we propose to create a new family termed “Secoviridae” to include the genera Comovirus, Fabavirus, Nepovirus, Cheravirus, Sadwavirus, Sequivirus and Waikavirus. Two newly discovered plant viruses share common properties with members of the proposed family Secoviridae but have distinct specific genomic organizations. In phylogenetic reconstructions, they form a separate sub-branch within the Secoviridae lineage. We propose to create a new genus termed Torradovirus (type species, Tomato torrado virus) and to assign this genus to the proposed family Secoviridae.
Original languageEnglish
Pages (from-to)899-907
JournalArchives of Virology
Volume154
Issue number5
DOIs
Publication statusPublished - 2009

Keywords

  • cowpea-mosaic-virus
  • yellow-fleck-virus
  • complete nucleotide-sequence
  • putative movement protein
  • tobacco ringspot virus
  • tungro spherical virus
  • n-terminal region
  • rna viruses
  • genomic organization
  • cysteine proteases

Fingerprint Dive into the research topics of 'Secoviridae: a proposed family of plant viruses within the order Picornavirales that combines the families Sequiviridae and Comoviridae, the unassigned genera Cheravirus and Sadwavirus, and the proposed genus Torradovirus'. Together they form a unique fingerprint.

  • Cite this