Mapping of conformational epitopes on capsid protein VP2 of infectious bursal disease virus by fd-tet phage display

文献类型： 外文期刊

第一作者： Cui, XL

作者： Cui, XL;Nagesha, HS;Holmes, IH

作者机构：

关键词： infectious bursal disease virus;monoclonal antibodies (MAb);conformational epitope;fd-tet phage display

期刊名称：JOURNAL OF VIROLOGICAL METHODS （ 影响因子：2.014； 五年影响因子：2.001 ）

ISSN： 0166-0934

年卷期： 2003 年 114 卷 1 期

页码：

收录情况： SCI

摘要： Conformational epitopes on VP2 protein of infectious bursal disease virus (IBDV) were mapped using fd-tet phage display. A gene-targeted phage display library was made using DNA fragments ranging approximately from 80 to 400 bp of the hypervariable region of the VP2 gene of IBDV strain 002-73, as neutralizing monoclonal antibodies against the VP2 protein recognize VP2 conformation-dependent epitopes within the hypervariable region. The phages were selected using immobilized monoclonal antibodies. Epitopes on five phages selected with monoclonal antibody 17-82 were located between amino acids 211 and 344. A constructed phage containing amino acids from 204 to 344 strongly reacted with monoclonal antibodies. Compared to that of the constructed phage, the binding of monoclonal antibodies to the five selected phages was dramatically reduced when several amino acids at either terminus or both termini were absent. The binding of a phage, with conversion of the first hydrophilic region into a hydrophobic region as a result of a chance frameshift mutation from amino acids 214 to 225, dropped sharply. It indicates that conformational epitopes may be up to 423 bp long and the commonly suggested fragments of 50-300 bp for making gene-targeted phage display libraries are not long enough to cover the conformational epitopes. This technique can be used to identify the minimum length of the conformational epitopes for developing recombinant vaccines and specific diagnostic tests. (C) 2003 Elsevier B.V. All rights reserved.

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