摘要:
                                There is growing interest in using tumor associated antigens presented by class1 major histocompatibility complex (MHC-I) proteins as cancer vaccines. As native peptides are poorly stable in biological fluids, researchers have sought to engineer synthetic peptidomimetics with greater biostability. Here, we demonstrate that antigenic peptidomimetics or the Melan-A/MART-(126(27L)-35) melanoma antigen adopt strikingly different conformations when hound to MHC-I highlighting the degeneracy of T cell recognition and revealing the challenges associated with mimicking native peptide conformation.