Polymorphisms and the Antiviral Property of Porcine Mxl Protein.

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  • ASANO Atsushi
    Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University
  • KO Jae Hong
    Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University
  • MOROZUMI Takeya
    The Second Research Division, STAFF Institute
  • HAMASHIMA Noriyuki
    The Second Research Division, STAFF Institute
  • WATANABE Tomomasa
    Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University

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  • Polymorphisms and the antiviral property of porcine Mx1 protein

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We determined the cDNA sequences of the type I interferon-inducible proteins, pig Mx1 from PK(15) and LLC-PK1 cells, and compared the antiviral activities of both Mx proteins, including Mx1 polymorphisms against vesicular stomatitis virus (VSV). Mx1 cDNA derived from PK(15) cells had an 11 bp-deletion in the 3' end of the coding region, and was estimated to encode 8 amino acid substitutions and a 23 amino acid extension compared to that from LLC-PK1 cells. VSV replication was inhibited in the 3T3 cells expressing Mx1 mRNA after the cDNA was transfected. However, the efficiency of this inhibition was not different between the cells expressing Mx1 mRNA from both PK and LLC. These results indicate that pig Mx1 protein confers resistance to VSV.<br>

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