Expression of VP5 of infectious pancreatic necrosis virus strain VR299 is initiated at the second in-frame start codon

Infectious pancreatic necrosis virus (IPNV), a member of the Birnaviridae with two double-stranded RNA genome segments, encodes five proteins designated VP1 to VP5. To study the function of the 17 kDa nonstructural protein VP5 during virus replication several mutated IPNV genome segments A were cons...

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Bibliographic Details
Published in:Journal of general virology 2001-04, Vol.82 (4), p.805-812
Main Authors: Weber, S, Fichtner, D, Mettenleiter, T.C, Mundt, E
Format: Article
Language:English
Subjects:
Amino Acid Sequence
Animals
Base Sequence
Birnaviridae
Capsid - biosynthesis
Capsid - genetics
Capsid - physiology
Capsid Proteins
Cells, Cultured
Codon
double-stranded RNA
genome
Infectious pancreatic necrosis virus
Infectious pancreatic necrosis virus - genetics
microbial growth
Molecular Sequence Data
mutation
start codon
viral nonstructural proteins
virus replication
viruses
VP1 protein
VP2 protein
VP3 protein
VP4 protein
VP5 protein
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Summary:Infectious pancreatic necrosis virus (IPNV), a member of the Birnaviridae with two double-stranded RNA genome segments, encodes five proteins designated VP1 to VP5. To study the function of the 17 kDa nonstructural protein VP5 during virus replication several mutated IPNV genome segments A were constructed and included in a reverse genetics system for IPNV to obtain recombinant virus. Mutations between nt 68 and 85 or nt 94 and 103 in the noncoding region failed to yield viable virus. Only mutations located between nt 86 and 92 and downstream of nt 104 were tolerated, and viable virus could be generated. All IPNV generated showed no difference in replication compared with the wild-type IPNV, indicating that the absence of expression of VP5 did not influence virus growth in vitro. Furthermore, the results presented here indicate that initiation of translation of VP5 occurs at position 113, the second in-frame start codon.
ISSN:0022-1317
1465-2099
DOI:10.1099/0022-1317-82-4-805