Involvement of the terminus of grouper betanodavirus capsid protein in virus-like particle assembly
- 1 January 2003
- journal article
- research article
- Published by Springer Nature in Archiv für die gesamte Virusforschung
- Vol. 148 (2) , 345-355
- https://doi.org/10.1007/s00705-002-0901-8
Abstract
Dragon grouper, Epinephelus lanceolatus, nervous necrosis virus (DGNNV) consists of 180 copies of capsid protein that encapsulates a bipartite genome of single-stranded (+)RNAs. Expressing the open reading frame (ORF) of RNA2 in Escherichia coli forms virus-like particles (VLPs) that resembles native virus. Deleting N- and C-termini revealed different impacts on VLP formation. Deletion of 35 or 52 residues at the N-terminus completely ruined the VLP assembly, presumably due to removal of positively charged residues for binding RNAs. When deletions were restricted to 4, 16, or 25 N-terminal residues, the assembly of VLPs remained. The ability of VLP formation diminished when 4 to 11 C-terminal residues were deleted. The termini that can be deleted without seriously destructing the VLPs are 25 and 3 residues at N- and C-termini, respectively.Keywords
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