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PB1F2 is the 11th protein of the influenza A virus. The protein has variable sizes with truncations either at the C- or N-terminal ends. The most recent example being the 2009 pandemic H1N1 virus which codes for only 11 amino-acids of the C-terminus. A review of the reports since the discovery of PB1F2 in 2001 suggests a multifunctional role for this protein that includes a proapoptotic function in...
Infectious bursal disease virus (IBDV) is a birnavirus that causes immunosuppressive disease in chickens. The emergence of very virulent IBDV (vvIBDV) has brought new challenges for this disease. The molecular determinants for the high pathogenicity of vvIBDV are not fully understood. Previous studies focused mostly on the VP2 protein on segment A, but recent evidence suggests that segment B also...
The contribution of S2 accessory gene of equine infectious anemia virus (EIAV) to the virulence of pathogenic strains was investigated in the present study by reverse mutation of all four consensus S2 mutation sites in an attenuated EIAV proviral strain, FDDV3-8, to the corresponding sequences of a highly pathogenic strain DV117. The S2 reverse-mutated recombinant strain FDDVS2r1-2-3-4 replicated...
The viral envelope glycoprotein (GP) is thought to play important roles in the pathogenesis of filovirus infection. It is known that GP expressed on the cell surface forms a steric shield over host proteins such as major histocompatibility complex class I and integrin β1, which may result in the disorder of cell-to-cell contacts and/or inhibition of the immune response. However, it is not clarified...
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