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eIF2α phosphorylation and the regulation of translation

  • Erik Boye
  • Beáta GrallertEmail author
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Abstract

We discuss novel insight into the role and consequences of the phosphorylation of the translation initiation factor eIF2α in the context of stress responses and cell-cycle regulation. eIF2α is centrally located to regulate translation and its phosphorylation in response to different environmental challenges is one of the best characterized stress-response pathways. In addition to its role in stress management, eIF2α phosphorylation is also linked to cell-cycle progression and memory consolidation in the nervous system. The best known consequences of eIF2α phosphorylation are downregulation of global translation and stimulation of translation of some mRNAs. However, recent evidence shows that (i) eIF2α phosphorylation is not always required for the downregulation of global translation after exposure to stress and (ii) eIF2α phosphorylation does not necessarily lead to the downregulation of global translation. These results suggest that the textbook view of eIF2α phosphorylation needs to be revised and that there must be additional regulatory mechanisms at play.

Keywords

eIF2α phosphorylation Stress response Cell cycle Selective translation Global translation 

Notes

Acknowledgements

We thank Silje Anda for comments on the manuscript, past and present group members for helpful discussions and the Norwegian Research Council, the Norwegian Cancer Society, the South-Eastern Norwegian Health Authority, the Simon Fougner Hartmanns Familiefond and Radiumhospitalets Legater for funding.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Radiation BiologyInstitute for Cancer Research, Oslo University HospitalOsloNorway

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