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  • Title: Selection and identification of B-cell epitope on NS1 protein of dengue virus type 2.
    Author: Jiang L, Zhou JM, Yin Y, Fang DY, Tang YX, Jiang LF.
    Journal: Virus Res; 2010 Jun; 150(1-2):49-55. PubMed ID: 20211209.
    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.
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