Production and characterization of mouse monoclonal antibodies against lysis protein E of phiX174
文献类型: 外文期刊
第一作者: Yu, Shenye
作者: Yu, Shenye;Zhao, Hailing;Wang, Huanan;Wang, Xiumei;Xu, Lili;Si, Wei;Chen, Liping;Zhang, Wanjiang;Liu, Siguo;Shao, Guangxi
作者机构:
关键词: Monoclonal antibody;Phage phiX174;Protein E;Epitope
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: 2013 年 189 卷 2 期
页码:
收录情况: SCI
摘要: Bacterial ghosts offer a new avenue for the study of inactivated vaccines. However, for many years the mechanism of genetic inactivation was controversial. To obtain mouse monoclonal antibodies (mAbs) against protein E will allow the observation of its location and dynamic expression to expand understanding of the lysis mechanism. In this study, a His-tagged Delta E fusion protein expressed in bacteria was used as the immunogen, and mAbs targeting protein E were produced by the hybridoma technique and selected by enzyme-linked immunosorbent assay using GST-E and GST-AE as coating proteins. Purified mAbs from mouse ascites were screened against a phage-displayed random dodecapeptide library (Ph.D.-12). After three rounds of biopanning, 30 phage clones were randomly selected and sequenced, and their amino acids were deduced. One epitope showed a good match with protein E at 57-63aa (KPLN-R) and the synthetic decapeptide Epep (VRLKPLNCSR) strongly inhibited combination of E-A5 with E fusion proteins. Immunofluorescence microscopy indicated specific immunoreactivity of E-A5 with Escherichia coli-expressed native protein E. The novel mAbs may be of great potential value in analysis of the function and lysis pathway of protein E and other relative phages and in evaluation of E as potential marker of bacterial ghosts. (C) 2013 Elsevier B.V. All rights reserved.
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