Cytopathogenicity of pestiviruses: cleavage of bovine viral diarrhea virus NS2-3 has to occur at a defined position to allow viral replication.
Despite of highly divergent genome organizations, the N terminus of nonstructural protein 3 (NS3) is highly conserved between cytopathogenic (cp) bovine viral diarrhea virus (BVDV) strains. Generation of NS3, often by NS2-3 cleavage, is a marker of cp BVDV. The significance of the cleavage site within NS2-3 for viral replication was addressed by the use of BVDV replicons. Our results demonstrate that elongation as well as truncation of NS3 strongly interfere with viral RNA replication. This finding strongly suggests that the observed conservation of the N terminus of NS3 between cp BVDV is caused by functional selection and not by the presence of a hotspot of recombination.
Tautz
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N
Institut für Virologie, Justus-Liebig-Universität Giessen, Giessen, Germany. Norbert.Tautz@vetmed.uni-giessen.de
Thiel
H-J
HJ
D000595:Amino Acid Sequence; D000818:Animals; D002417:Cattle; D030242:Diarrhea Virus 2, Bovine Viral / Q000302:isolation & purification / Q000472:pathogenicity / Q000502:physiology*; D005814:Genes, Viral; D016679:Genome, Viral; D030243:Hemorrhagic Syndrome, Bovine / Q000821:virology; D008156:Luciferases / Q000235:genetics / Q000378:metabolism; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D025801:Ubiquitin / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D017361:Viral Nonstructural Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D015678:Viral Structural Proteins / Q000235:genetics; D014779:Virus Replication
D011993:Recombinant Fusion Proteins; D025801:Ubiquitin; D017361:Viral Nonstructural Proteins; D015678:Viral Structural Proteins; C074956:p125 protein, bovine diarrhea virus; D008156:Luciferases