The AcP10 protein—an active uridine kinase, encoded by the beluga whale coronavirus SW1—is an antagonist of the integrated stress response that acts downstream of phosphorylation of the translation initiation factor eIF2, irrespective of which eIF2 kinase is activated. AcP10 acts as a competitive inhibitor of the eIF2[P]–eIF2B interaction by binding to eIF2B. A protein with a similar function is also encoded by Aichivirus, a picornavirus.
- Huib H. Rabouw
- Linda J. Visser
- Frank J. M. van Kuppeveld
