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  • Title: The rhesus rotavirus gene encoding protein VP3: location of amino acids involved in homologous and heterologous rotavirus neutralization and identification of a putative fusion region.
    Author: Mackow ER, Shaw RD, Matsui SM, Vo PT, Dang MN, Greenberg HB.
    Journal: Proc Natl Acad Sci U S A; 1988 Feb; 85(3):645-9. PubMed ID: 2829198.
    Abstract:
    The complete gene 4 nucleotide sequence was determined for rhesus rotavirus and each of 11 viral variants selected by neutralizing monoclonal antibodies. Gene 4 is 2362 bases in length and encodes a protein, VP3, of 776 amino acids with a calculated Mr of 86,500. A conserved trypsin cleavage site, located at amino acid 247, divides VP3 into VP8 and VP5. Neutralizing monoclonal antibodies directed at VP3 were used to select variants that escaped neutralization. Each variant contains a single gene 4 mutation that permits viral growth in the presence of the antibody. Variant mutations were identified in six distinct neutralization regions in VP8 and VP5. Five of the six neutralization regions were found in VP8. The VP8 regions were primarily associated with strain-specific or limited heterotypic rotavirus neutralization. One region was identified in VP5 by three monoclonal antibodies that neutralize a broad range of rotavirus serotypes. The VP5 neutralization region is largely hydrophobic and is similar to putative fusion sequences of Sindbis and Semliki Forest viruses.
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