Erschienen in:
01.09.2008 | Original Article
Antigenic characterization of bovine ephemeral fever rhabdovirus G and GNS glycoproteins expressed from recombinant baculoviruses
verfasst von:
Jasjit Johal, Karryn Gresty, Kritaya Kongsuwan, Peter J. Walker
Erschienen in:
Archives of Virology
|
Ausgabe 9/2008
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Abstract
Recombinant baculoviruses expressing the BEFV envelope glycoprotein G and non-structural glycoprotein GNS were constructed. The G protein expressed in insect cells was located on the cell surface and induced spontaneous cell fusion at mildly acidic pH. The expressed G protein reacted with MAbs to continuous and conformational neutralization sites (G1, G2, G3b and G4), but not to conformational site G3a. The expressed GNS protein was also located on the cell surface but did not exhibit fusogenic activity. The GNS protein reacted with polyclonal antiserum produced from vaccinia-virus-expressed recombinant GNS but did not react with G protein antibodies. A His6-tagged, soluble form of the G protein was expressed and purified by Ni2+–NTA chromatography. The purified G protein reacted with BEFV-neutralizing MAbs to all continuous and conformational antigenic sites. The highly protective characteristics of the native BEFV G protein suggest that the secreted, baculovirus-expressed product may be a useful vaccine antigen.