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Activation of the Antiviral Kinase PKR and Viral Countermeasures
Department of Medical Microbiology & Immunology, University of Alberta, 632 Heritage Medical Research Center, Edmonton, AB, T6G 2S2, Canada
P15, Robert Koch-Institute/Nordufer 20, 13353 Berlin, Germany
* Authors to whom correspondence should be addressed.
Received: 11 August 2009; in revised form: 26 October 2009 / Accepted: 26 October 2009 / Published: 27 October 2009
Abstract: The interferon-induced double-stranded (ds)RNA-dependent protein kinase (PKR) limits viral replication by an eIF2α-mediated block of translation. Although many negative-strand RNA viruses activate PKR, the responsible RNAs have long remained elusive, as dsRNA, the canonical activator of PKR, has not been detected in cells infected with such viruses. In this review we focus on the activating RNA molecules of different virus families, in particular the negative-strand RNA viruses. We discuss the recently identified non-canonical activators 5’-triphosphate RNA and the vRNP of influenza virus and give an update on strategies of selected RNA and DNA viruses to prevent activation of PKR.
Keywords: PKR; virus; dsRNA; innate immunity; immune evasion
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Cite This Article
MDPI and ACS Style
Dauber, B.; Wolff, T. Activation of the Antiviral Kinase PKR and Viral Countermeasures. Viruses 2009, 1, 523-544.
Dauber B, Wolff T. Activation of the Antiviral Kinase PKR and Viral Countermeasures. Viruses. 2009; 1(3):523-544.
Dauber, Bianca; Wolff, Thorsten. 2009. "Activation of the Antiviral Kinase PKR and Viral Countermeasures." Viruses 1, no. 3: 523-544.