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Using Reverse Genetics to Manipulate the NSs Gene of the Rift Valley Fever Virus MP-12 Strain to Improve Vaccine Safety and Efficacy
Published on: November 1, 2011
A fully attenuated recombinant Salmonid alphavirus becomes pathogenic through a single amino acid change in the E2
Emilie Mérour1, Annie Lamoureux, Julie Bernard
1Unité de Virologie et Immunologie Moléculaires, INRA, CRJ, Jouy en Josas, France.
Abstract:
A recombinant sleeping disease virus (rSDV) was previously shown to be totally attenuated and provide long-term protection in trout (C. Moriette, M. Leberre, A. Lamoureux, T. L. Lai, M. Brémont, J. Virol. 80:4088-4098, 2006). Sequence comparison of the rSDV to wild-type genomes exhibited a number of nucleotide changes. In the current study, we demonstrate that the virulent phenotype of SDV was essentially associated with two amino acid changes, V8A and M136T, in the E2 glycoprotein, with the V8A change mostly being involved in the acquisition of the virulent phenotype.
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