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© Institut Pasteur
Structure de macromolécules : dimère d'aquométhémoglobine de cheval. Dérivé toxique oxydé de l'hémoglobine, représentant 1 à 2% du total.
Publication : Nucleic acids research

Rabies virus matrix protein interplay with eIF3, new insights into rabies virus pathogenesis

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nucleic acids research - 07 Feb 2007

Komarova AV, Real E, Borman AM, Brocard M, England P, Tordo N, Hershey JW, Kean KM, Jacob Y

Link to Pubmed [PMID] – 17287294

Nucleic Acids Res. 2007;35(5):1522-32

Viral proteins are frequently multifunctional to accommodate the high density of information encoded in viral genomes. Matrix (M) protein of negative-stranded RNA viruses such as Rhabdoviridae is one such example. Its primary function is virus assembly/budding but it is also involved in the switch from viral transcription to replication and the concomitant down regulation of host gene expression. In this study we undertook a search for potential rabies virus (RV) M protein’s cellular partners. In a yeast two-hybrid screen the eIF3h subunit was identified as an M-interacting cellular factor, and the interaction was validated by co-immunoprecipitation and surface plasmon resonance assays. Upon expression in mammalian cell cultures, RV M protein was localized in early small ribosomal subunit fractions. Further, M protein added in trans inhibited in vitro translation on mRNA encompassing classical (Kozak-like) 5′-UTRs. Interestingly, translation of hepatitis C virus IRES-containing mRNA, which recruits eIF3 via a different noncanonical mechanism, was unaffected. Together, the data suggest that, as a complement to its functions in virus assembly/budding and regulation of viral transcription, RV M protein plays a role in inhibiting translation in virus-infected cells through a protein-protein interaction with the cellular translation machinery.

http://www.ncbi.nlm.nih.gov/pubmed/17287294