Characterization of the RNA-binding activity of VP3, a major structural protein of Infectious bursal disease virus

Characterization of the RNA-binding activity of VP3, a major structural protein of Infectious... Infectious bursal disease virus (IBDV) is the agent of an immune-depressive disease affecting the poultry industry worldwide. Infection of IBDV leads to expression of five mature virus-encoded proteins. Proteolytic processing of the virus-encoded polyprotein generates VP3 which coats the inner surface of the IBDV capsid. In this report, we describe the characterization of the RNA-binding activity of VP3. For these studies, the VP3 coding region was fused to a histidine tag and expressed in insect cells using a recombinant baculovirus. The histidine-tagged VP3 was affinity-purified and used to study its ability to bind RNA molecules using three complementary methods: (i) Northwestern blotting; (ii) binding of VP3 protein-RNA complexes to nitrocellulose membranes; and (iii) electrophoretic mobility shift assays. The results demonstrated that VP3 efficiently bound ssRNA and dsRNA. Under the experimental conditions used in this study, the formation of VP3-RNA complexes did not depend upon the presence of specific RNA sequences. A series of histidine-tagged VP3 deletion mutants spanning the whole VP3 coding region were generated. The use of these mutants revealed that the VP3 RNA-binding domain layed in a highly conserved 69 aa stretch close to the N-terminus of the protein. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Characterization of the RNA-binding activity of VP3, a major structural protein of Infectious bursal disease virus

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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/s00705-002-0949-5
Publisher site
See Article on Publisher Site

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