Molecular docking analysis of 2009-H1N1 and 2004-H5N1 influenza virus HLA-B*4405-restricted HA epitope candidates: implications for TCR cross-recognition and vaccine development

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• 作者：Chinh TT Su (1)
  Christian Sch?nbach (3) (4)
  Chee-Keong Kwoh (1) (2)
  
• 刊名：BMC Bioinformatics
• 出版年：2013
• 出版时间：January 2013
• 年：2013
• 卷：14
• 期：2-supp
• 全文大小：215KB
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• 作者单位：Chinh TT Su (1)
  Christian Sch?nbach (3) (4)
  Chee-Keong Kwoh (1) (2)
  
  1. Bioinformatics Research Centre, School of Computer Engineering, Nanyang Technological University, Singapore, 639798, Singapore
  3. Department of Bioscience and Bioinformatics, School of Computer Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka, 820-8502, Japan
  4. Biomedical Informatics Research Center, Kyushu Institute of Technology, Fukuoka, 820-8502, Japan
  2. Biomedical Engineering Research Centre, College of Engineering, Nanyang Technological University, Singapore, 637553, Singapore
  
• ISSN：1471-2105

文摘

Background The pandemic 2009-H1N1 influenza virus circulated in the human population and caused thousands deaths worldwide. Studies on pandemic influenza vaccines have shown that T cell recognition to conserved epitopes and cross-reactive T cell responses are important when new strains emerge, especially in the absence of antibody cross-reactivity. In this work, using HLA-B*4405 and DM1-TCR structure model, we systematically generated high confidence conserved 2009-H1N1 T cell epitope candidates and investigated their potential cross-reactivity against H5N1 avian flu virus. Results Molecular docking analysis of differential DM1-TCR recognition of the 2009-H1N1 epitope candidates yielded a mosaic epitope (KEKMNTEFW) and potential H5N1 HA cross-reactive epitopes that could be applied as multivalent peptide towards influenza A vaccine development. Structural models of TCR cross-recognition between 2009-H1N1 and 2004-H5N1 revealed steric and topological effects of TCR contact residue mutations on TCR binding affinity. Conclusions The results are novel with regard to HA epitopes and useful for developing possible vaccination strategies against the rapidly changing influenza viruses. Yet, the challenge of identifying epitope candidates that result in heterologous T cell immunity under natural influenza infection conditions can only be overcome if more structural data on the TCR repertoire become available.