Luteoviruses

L. L. Domier, C. J. D'Arcy

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Viruses of the family Luteoviridae (luteovirids) cause economically important diseases in monocotylednous and dicotyledonous plants. The severity and distribution of infections, which are commonly diagnosed serologically, are dependent on meteorological conditions that favor movement and reproduction of vector aphids on susceptible plants. The viruses were first grouped based on common biological properties, including persistent and often strain-specific transmission by aphids and induction of yellowing symptoms. Luteovirids were later found to share a common particle morphology (nonenveloped 25 nm icosahedral), with virus particles composed of one molecule of positive-sense single-stranded RNA and one major and one minor capsid protein. Luteovirid genomic RNAs contain 5-8 open reading frames (ORFs). Several different strategies are used to express the ORFs, including frameshifting, leaky scanning, termination codon readthrough, and long-distance RNA-RNA interactions. The family Luteoviridae is divided into three genera - Luteovirus, Polerovirus, and Enamovirus - based on the arrangements, sizes, and phylogenetic relationships of the predicted amino acid sequences of the ORFs. Even though the structural proteins of luteovirids are highly conserved, ORFs 1 and 2 of luteoviruses are related to the polymerase genes of viruses of the family Tombusviridae, while ORFs 1 and 2 of poleroviruses and enamoviruses are related to those of the genus Sobemovirus.

Original languageEnglish (US)
Title of host publicationEncyclopedia of Virology
PublisherElsevier Ltd
Pages231-238
Number of pages8
ISBN (Print)9780123744104
DOIs
StatePublished - Jan 1 2008
Externally publishedYes

Keywords

  • Aphid transmission
  • Frameshift
  • Helper virus
  • Leaky scanning
  • Phloem
  • Readthrough
  • Recombination
  • Subgenomic RNA
  • VPg
  • Yellows

ASJC Scopus subject areas

  • Immunology and Microbiology(all)

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