SAMD9 is an innate antiviral host factor with stress response properties that can be antagonized by poxviruses

J Virol. 2015 Feb;89(3):1925-31. doi: 10.1128/JVI.02262-14.

Jia Liu ¹, Grant McFadden ²

Affiliations

1 Department of Microbiology and Immunology, University of Arkansas for Medical Sciences (UAMS), Little Rock, Arkansas, USA Center for Microbial Pathogenesis and Host Inflammatory Response, University of Arkansas for Medical Sciences (UAMS), Little Rock, Arkansas, USA [email protected].
2 Department of Molecular Genetics and Microbiology, University of Florida College of Medicine, Gainesville, Florida, USA.

PMID: 25428864 DOI: 10.1128/JVI.02262-14

Abstract

We show that SAMD9 is an innate host Antiviral stress response element that participates in the formation of Antiviral granules. Poxviruses, myxoma virus and vaccinia virus specifically, utilize a virus-encoded host range factor(s), such as a member of the C7L superfamily, to antagonize SAMD9 to prevent granule formation in a eukaryotic initiation factor 2α (eIF2α)-independent manner. When SAMD9 is stimulated due to failure of the viral antagonism during Infection, the resulting Antiviral granules exhibit properties different from those of the canonical stress granules.

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