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Virus Res. 2010 Jun;150(1-2):49-55. doi: 10.1016/j.virusres.2010.02.012. Epub 2010 Mar 6.

Selection and identification of B-cell epitope on NS1 protein of dengue virus type 2.

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  • 1Department of Microbiology, Zhongshan School of Medicine, Sun Yat-Sen University, Zhongshan Road 2, Guangzhou 510080, PR China.

Abstract

NS1 of dengue virus (DENV) is an important non-structural protein, which plays an important role in DENV replication and dengue infection. In this study, using the phage-displayed peptide library screening method and purified anti-DENV2-NS1 polyclonal antibody immunoglobulin G (IgG) as target, which was generated from the purified recombinant expressed DENV2-NS1 protein immunization on rabbit, seven B-cell epitopes of DENV2-NS1 protein were screened. Considering the results of comprehensive bioinformatic analysis on NS1 B-cell epitopes, possible dominant B-cell epitopes are located in amino acids residues 36-45, 80-89, 103-112, 121-130, 187-196, 295-304, and 315-324 of the NS1, and two epitope-based NS1 protein dodecapeptides corresponding to the predominant epitopes (PA10: (36)PESPSKLASA(45) and AA10: (187)AIKDNRAVHA(196)) were chosen for synthesis. Results of binding assay and competitive-inhibition assays indicated the two peptides were the specific epitopes of DENV2-NS1 protein. These epitopes could be useful in understanding the pathogenesis of DENV and as dengue vaccine constituents in further study.

(c) 2010 Elsevier B.V. All rights reserved.

PMID:
20211209
[PubMed - indexed for MEDLINE]
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