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  • Title: Pseudorabies virus gIII and bovine herpesvirus 1 gIII share complementary functions.
    Author: Liang XP, Babiuk LA, Zamb TJ.
    Journal: J Virol; 1991 Oct; 65(10):5553-7. PubMed ID: 1654451.
    Abstract:
    The gIII glycoproteins of bovine herpesvirus 1 (BHV-1) and of pseudorabies virus (PRV) are structurally homologous. Both proteins also play preeminent roles in mediating virus attachment to permissive cells. To directly compare the functional relation between these glycoproteins, we constructed a recombinant BHV-1 in which the BHV-1 gIII coding sequence was replaced by the PRV gene homolog. The resultant recombinant virus efficiently expressed PRV gIII and then incorporated it into its envelope. The levels of PRV gIII expression and incorporation were equivalent to those achieved by the wild-type virus for BHV-1 gIII. The recombinant virus was fully susceptible to neutralization by anti-PRV gIII neutralizing antibody. In addition, the virus attachment and penetration functions, as well as the virus replication efficiency, which were lost by deleting the BHV-1 gIII gene, were restored by expressing the PRV gIII homolog in its place. These results demonstrated that PRV gIII and BHV-1 gIII share complementary functions.
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