Involvement of the terminus of grouper betanodavirus capsid protein in virus-like particle assembly

Involvement of the terminus of grouper betanodavirus capsid protein in virus-like particle assembly 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Involvement of the terminus of grouper betanodavirus capsid protein in virus-like particle assembly

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Publisher
Springer-Verlag
Copyright
Copyright © 2002 by Springer-Verlag/Wien
Subject
Legacy
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-002-0901-8
Publisher site
See Article on Publisher Site

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.

Journal

Archives of VirologySpringer Journals

Published: Jan 1, 2003

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