Abstract
Identification of T cell epitopes is a critical, but often difficult step in studying T cell function and developing peptide-based vaccines and immunotherapies. Unlike antibodies that recognize free soluble antigens, T cell receptor (TCR) recognizes its epitope bound to major histocompatibility complex (MHC) expressed on antigen presenting cells (APCs). In addition, the examination of T cell epitope activity requires the use of professional APCs, which are difficult to isolate, expand, and maintain. To address these issues, we have developed a facile, accurate, and high-throughput method for T cell epitope mapping by screening antigen-derived peptide libraries in complex with MHC protein displayed on yeast cell surface. Here, we use hemagglutinin and influenza A virus X31/A/Aichi/68 as examples to describe the key steps in identification of CD4+ T cell epitopes from a single antigenic protein and the entire genome of a pathogen, respectively. Methods for single-chain peptide-MHC complex vector design, yeast surface display, peptide library generation in Escherichia coli, and functional screening in Saccharomyces cerevisiae are discussed.
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Wen, F., Zhao, H. (2013). Construction and Screening of an Antigen-Derived Peptide Library Displayed on Yeast Cell Surface for CD4+ T Cell Epitope Identification. In: Fulton, K., Twine, S. (eds) Immunoproteomics. Methods in Molecular Biology, vol 1061. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-589-7_15
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DOI: https://doi.org/10.1007/978-1-62703-589-7_15
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