Interaction between the keratin cytoskeleton and eEF1Bgamma affects protein synthesis in epithelial cells

Nat Struct Mol Biol. 2007 Oct;14(10):982-3. doi: 10.1038/nsmb1301. Epub 2007 Sep 30.

Abstract

Eukaryotic elongation factor-1 (eEF1) is essential for peptide-chain elongation during translation. We report that its gamma subunit (eEF1Bgamma) specifically binds, and bundles, keratin intermediate filaments. Disrupting this interaction depresses translation by approximately 20% and selectively increases 80S ribosomes in epithelial cells, an outcome recapitulated by RNA interference-mediated silencing of eEF1Bgamma. These findings extend the emerging relationship between keratin proteins and the translational machinery.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Cytoskeleton / metabolism*
  • Epithelial Cells / cytology
  • Epithelial Cells / metabolism*
  • Humans
  • Keratins / metabolism*
  • Mice
  • Molecular Sequence Data
  • Peptide Elongation Factor 1 / genetics
  • Peptide Elongation Factor 1 / metabolism*
  • Protein Biosynthesis*
  • Protein Subunits / genetics
  • Protein Subunits / metabolism*
  • Ribosomes / metabolism
  • Sequence Alignment

Substances

  • Peptide Elongation Factor 1
  • Protein Subunits
  • Keratins