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Journal of Virology, July 2000, p. 6203-6206, Vol. 74, No. 13
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Influenza Virus NS1 Protein Counteracts PKR-Mediated Inhibition of Replication

Michael Bergmann,1 Adolfo Garcia-Sastre,2 Elena Carnero,2 Hubert Pehamberger,3 Klaus Wolff,3 Peter Palese,2 and Thomas Muster3,*

Department of Surgery1 and Department of Dermatology,3 University of Vienna Medical School, 1090 Vienna, Austria, and Department of Microbiology, Mount Sinai Medical Center, New York, New York 100292

Received 29 December 1999/Accepted 7 April 2000

The availability of an influenza virus NS1 gene knockout virus (delNS1 virus) allowed us to establish the significance of the biological relationship between the influenza virus NS1 protein and double-stranded-RNA-activated protein kinase (PKR) in the life cycle and pathogenicity of influenza virus. Our results show that the lack of functional PKR permits the delNS1 virus to replicate in otherwise nonpermissive hosts, suggesting that the major function of the influenza virus NS1 protein is to counteract or prevent the PKR-mediated antiviral response.


* Corresponding author. Mailing address: Department of Dermatology, University of Vienna Medical School, 1090 Vienna, Austria. Phone: 43-1-40400-5441. Fax: 43-1-40400-7790. E-mail: Thomas.Muster{at}Akh-Wien.ac.at.


Journal of Virology, July 2000, p. 6203-6206, Vol. 74, No. 13
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.



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