Coordinated and selective recruitment of eIF4E and eIF4G factors for potyvirus infection in Arabidopsis thaliana

FEBS Lett. 2007 Mar 6;581(5):1041-6. doi: 10.1016/j.febslet.2007.02.007. Epub 2007 Feb 14.

Abstract

The translation initiation factors eIF4E and eIF(iso)4E play a key role during virus infection in plants. During mRNA translation, eIF4E provides the cap-binding function and is associated with the protein eIF4G to form the eIF4F complex. Susceptibility analyses of Arabidopsis mutants knocked-out for At-eIF4G genes showed that eIF4G factors are indispensable for potyvirus infection. The colonization pattern by a viral recombinant carrying GFP indicated that eIF4G is involved at a very early infection step. Like eIF4E, eIF4G isoforms are selectively recruited for infection. Moreover, the eIF4G selective involvement parallels eIF4E recruitment. This is the first report of a coordinated and selective recruitment of eIF4E and eIF4G factors, suggesting the whole eIF4F recruitment.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Arabidopsis / genetics
  • Arabidopsis / metabolism*
  • Arabidopsis / virology*
  • Arabidopsis Proteins / genetics
  • Arabidopsis Proteins / metabolism*
  • Base Sequence
  • DNA, Viral / genetics
  • Eukaryotic Initiation Factor-4E / genetics
  • Eukaryotic Initiation Factor-4E / metabolism*
  • Eukaryotic Initiation Factor-4G / genetics
  • Eukaryotic Initiation Factor-4G / metabolism*
  • Genes, Plant
  • Genetic Complementation Test
  • Mutation
  • Plant Diseases / genetics
  • Plant Diseases / virology
  • Potyvirus / genetics
  • Potyvirus / pathogenicity*
  • Protein Biosynthesis

Substances

  • Arabidopsis Proteins
  • DNA, Viral
  • Eukaryotic Initiation Factor-4E
  • Eukaryotic Initiation Factor-4G