The present invention is directed to the generation and use of recombinant
rotavirus fusion proteins as immunogens to produce a protective immune
response from immunized individuals. In one embodiment, the present
invention contemplates a recombinant rotavirus fusion protein vaccine
composition comprising a rotavirus subunit protein or immunogenic
fragment thereof, and an adjuvant in combination with the recombinant
rotavirus subunit fusion protein. In one aspect of this embodiment, the
recombinant rotavirus fusion protein comprises a rotavirus subunit
protein and a fusion partner protein in genetic association with the
rotavirus subunit protein, wherein the fusion partner protein does not
interfere with expression and immunogenicity of the rotavirus subunit
protein, the fusion partner protein prevents complex formation by the
rotavirus subunit protein, and the fusion partner protein facilitates
purification of the recombinant rotavirus fusion protein. In another
aspect of this embodiment, the rotavirus subunit protein is selected from
the group consisting of VP1, VP2, VP3, VP4, VP6, VP7, NSP1, NSP2, NSP3,
NSP4 or NSP5. In yet another aspect of this embodiment, the rotavirus
subunit protein is VP6.