Gain of virulence caused by loss of a gene in murine cytomegalovirus

Ivan Bubić, Markus Wagner, Astrid Krmpotić, Tanja Saulig, Sung Jin Kim, Wayne M. Yokoyama, Stipan Jonjić, Ulrich H. Koszinowski

Research output: Contribution to journalArticle

157 Citations (Scopus)

Abstract

Mouse strains are either resistant or susceptible to murine cytomegalovirus (MCMV). Resistance is determined by the CMV1r (Ly49h) gene, which encodes the Ly49H NK cell activation receptor. The protein encoded by the m157 gene of MCMV has been defined as a ligand for Ly49H. To find out whether the m157 protein is the only Ly49H ligand encoded by MCMV, we constructed the m157 deletion mutant and a revertant virus. Viruses were tested for susceptibility to NK cell control in Ly49H- and Ly49H- mouse strains. Deletion of the m157 gene abolished the viral activation of Ly49H+ NK cells, resulting in higher virus virulence in vivo. Thus, in the absence of m157, Ly49H+ mice react like susceptible strains. 129/SvJ mice lack the Ly49H activation NK cell receptor but express the inhibitory Ly49I NK cell receptor that binds to the m157 protein. The Δm157 inhibitory phenotype was weak because MCMV encodes a number of proteins that mediate NK inhibition, whose contribution could be shown by another mutant.

Original languageEnglish (US)
Pages (from-to)7536-7544
Number of pages9
JournalJournal of Virology
Volume78
Issue number14
DOIs
StatePublished - Jul 2004
Externally publishedYes

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Muromegalovirus
Cytomegalovirus
Natural Killer Cell Receptors
Virulence
virulence
natural killer cells
mice
Viruses
Natural Killer Cells
Genes
Proteins
genes
129 Strain Mouse
Ligands
Virus Activation
Gene Deletion
viruses
receptors
proteins
Phenotype

ASJC Scopus subject areas

  • Immunology

Cite this

Bubić, I., Wagner, M., Krmpotić, A., Saulig, T., Kim, S. J., Yokoyama, W. M., ... Koszinowski, U. H. (2004). Gain of virulence caused by loss of a gene in murine cytomegalovirus. Journal of Virology, 78(14), 7536-7544. https://doi.org/10.1128/JVI.78.14.7536-7544.2004

Gain of virulence caused by loss of a gene in murine cytomegalovirus. / Bubić, Ivan; Wagner, Markus; Krmpotić, Astrid; Saulig, Tanja; Kim, Sung Jin; Yokoyama, Wayne M.; Jonjić, Stipan; Koszinowski, Ulrich H.

In: Journal of Virology, Vol. 78, No. 14, 07.2004, p. 7536-7544.

Research output: Contribution to journalArticle

Bubić, I, Wagner, M, Krmpotić, A, Saulig, T, Kim, SJ, Yokoyama, WM, Jonjić, S & Koszinowski, UH 2004, 'Gain of virulence caused by loss of a gene in murine cytomegalovirus', Journal of Virology, vol. 78, no. 14, pp. 7536-7544. https://doi.org/10.1128/JVI.78.14.7536-7544.2004
Bubić, Ivan ; Wagner, Markus ; Krmpotić, Astrid ; Saulig, Tanja ; Kim, Sung Jin ; Yokoyama, Wayne M. ; Jonjić, Stipan ; Koszinowski, Ulrich H. / Gain of virulence caused by loss of a gene in murine cytomegalovirus. In: Journal of Virology. 2004 ; Vol. 78, No. 14. pp. 7536-7544.
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