Expression of multiple foreign epitopes presented as synthetic antigens on the surface of Potato virus X particles

Expression of multiple foreign epitopes presented as synthetic antigens on the surface of Potato... We describe the construction of recombinant Potato virus X (PVX) vectors expressing two different epitopes, ep4 and ep6, from Beet necrotic yellow vein virus (BNYVV). The seven-amino-acid epitopes were expressed as N-terminal coat protein fusions and were displayed on the surface of PVX particles. Particle assembly into full virions was successful even though no wild type coat protein subunits were present, and the epitopes could be detected in crude extracts and purified virus preparations with appropriate antibodies. A construct containing both epitope sequences in tandem was also prepared. The resulting PVX particles could be detected by antibodies against ep4 and ep6, either individually or simultaneously, showing that both epitopes were accessible. In addition mixed infections with PVX vectors containing the individual ep4 and ep6 sequences were carried out. This resulted in the formation of PVX particles displaying ep4 alone, ep6 alone, or both epitopes. These experiments demonstrate for the first time that PVX can be utilized to present multiple epitopes, either tandemly on every coat protein subunit or as heteromultimeric assemblies, both of which could be useful vaccination strategies. The production of epitope-presenting viruses in which every coat protein subunit contains a foreign epitope allows the high-level expression of defined numbers of foreign antigen sites, making such viruses useful standards for immune detection. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Expression of multiple foreign epitopes presented as synthetic antigens on the surface of Potato virus X particles

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Publisher
Springer-Verlag
Copyright
Copyright © 2005 by Springer-Verlag/Wien
Subject
Biomedicine; Medical Microbiology; Virology; Infectious Diseases
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-004-0402-z
Publisher site
See Article on Publisher Site

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