cAMP inhibits translation by inducing Ca2+/calmodulin-independent elongation factor 2 kinase activity in IPC-81 cells

R. Hovland, T. S. Eikhom, C. G. Proud, L. I. Cressey, M. Lanotte, S. O. Døskeland, G. Houge

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Treatment of IPC-81 cells led to inhibition of protein synthesis, which was accompanied by an increase in the average size of polysomes and a decreased rate of elongation, indicating that it involved inhibition of peptide chain elongation. This inhibition was also associated with increased phosphorylation of elongation factor eEF2 (which inhibits its activity) and enhanced Ca2+/calmodulin-independent activity of eEF2 kinase. Previous work has shown that phosphorylation of eEF2 kinase by cAMP-dependent protein kinase (cAPK) in vitro induces such activator-independent activity, and the present data show that such a mechanism can occur in intact cells to link physiological levels of cAPK activation with inhibition of protein synthesis.

Original languageEnglish
Pages (from-to)97-101
Number of pages5
JournalFEBS Letters
Issue number1
Publication statusPublished or Issued - 5 Feb 1999
Externally publishedYes


  • Elongation factor 2
  • IPC-81 cell
  • Translation
  • cAMP
  • eEF2 kinase

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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