Hepatitis C virus 3'UTR regulates viral translation through direct interactions with the host translation machinery

Nucleic Acids Res. 2013 Sep;41(16):7861-74. doi: 10.1093/nar/gkt543. Epub 2013 Jun 19.


The 3' untranslated region (3'UTR) of hepatitis C virus (HCV) messenger RNA stimulates viral translation by an undetermined mechanism. We identified a high affinity interaction, conserved among different HCV genotypes, between the HCV 3'UTR and the host ribosome. The 3'UTR interacts with 40S ribosomal subunit proteins residing primarily in a localized region on the 40S solvent-accessible surface near the messenger RNA entry and exit sites. This region partially overlaps with the site where the HCV internal ribosome entry site was found to bind, with the internal ribosome entry site-40S subunit interaction being dominant. Despite its ability to bind to 40S subunits independently, the HCV 3'UTR only stimulates translation in cis, without affecting the first round translation rate. These observations support a model in which the HCV 3'UTR retains ribosome complexes during translation termination to facilitate efficient initiation of subsequent rounds of translation.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • 3' Untranslated Regions*
  • 5' Untranslated Regions
  • Cell Line, Tumor
  • Eukaryotic Initiation Factor-3 / metabolism
  • Gene Expression Regulation, Viral*
  • Hepacivirus / genetics*
  • Humans
  • Protein Biosynthesis*
  • RNA, Viral / chemistry
  • RNA, Viral / metabolism
  • Ribosomal Proteins / metabolism
  • Ribosome Subunits, Small, Eukaryotic / chemistry
  • Ribosome Subunits, Small, Eukaryotic / virology


  • 3' Untranslated Regions
  • 5' Untranslated Regions
  • Eukaryotic Initiation Factor-3
  • RNA, Viral
  • Ribosomal Proteins