PMID- 23046123 OWN - NLM STAT- MEDLINE DCOM- 20130225 LR - 20211021 IS - 1600-065X (Electronic) IS - 0105-2896 (Linking) VI - 250 IP - 1 DP - 2012 Nov TI - A structural voyage toward an understanding of the MHC-I-restricted immune response: lessons learned and much to be learned. PG - 61-81 LID - 10.1111/j.1600-065X.2012.01159.x [doi] AB - T cells that express clonally distributed alphabeta T-cell receptors (TCRs) corecognize antigenic peptides (p) bound to major histocompatibility complex class I (MHC-I) and class II molecules (MHC-II). Extensive human leukocyte antigen (HLA) polymorphism enables HLA molecules from different haplotypes to capture an array of self- and microbe-derived peptide antigens that is fundamental to adaptive immunity. T cells developing in the thymus are selected for weak binding to self-peptide-HLA complexes generating a vast repertoire of clonally distinct T cells in the periphery. Indeed, diversity within germline loci and the finally assembled TCR genes, coupled with inherent TCR cross-reactivity, enables CD8(+) T cells to survey the multitude of pHLA-I landscapes. Precisely how does the TCR ligate to pHLA-I, and how does knowledge of the detailed structural interactions inform immunobiology? A recent number of our structural studies concerning the TCR-pMHC-I axis, alongside others in the field, have provided insight into HLA-I polymorphism, pMHC-I flexibility, TCR bias, TCR polymorphism, maintenance of self-tolerance, T-cell cross-reactivity, and alloreactivity. Collectively, the data also provide an opportunity to address the structural correlates of MHC-I restriction. Here, we provide our perspective concerning these advances in the field. Although much key information has been gleaned, the structural data show that some of the key concepts surrounding the TCR-pMHC-I interaction remain controversial and unresolved. CI - (c) 2012 John Wiley & Sons A/S. FAU - Gras, Stephanie AU - Gras S AD - Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia. FAU - Burrows, Scott R AU - Burrows SR FAU - Turner, Stephen J AU - Turner SJ FAU - Sewell, Andrew K AU - Sewell AK FAU - McCluskey, James AU - McCluskey J FAU - Rossjohn, Jamie AU - Rossjohn J LA - eng GR - BB/H001085/1/BB_/Biotechnology and Biological Sciences Research Council/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - England TA - Immunol Rev JT - Immunological reviews JID - 7702118 RN - 0 (HLA Antigens) RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Peptides) RN - 0 (Receptors, Antigen, T-Cell, alpha-beta) SB - IM MH - Adaptive Immunity MH - Animals MH - Binding Sites MH - Cross Reactions MH - HLA Antigens/*chemistry/immunology/metabolism MH - Histocompatibility Antigens Class I/*chemistry/immunology/metabolism MH - Humans MH - Major Histocompatibility Complex/*immunology MH - Mice MH - Models, Molecular MH - Peptides/*chemistry/immunology/metabolism MH - Protein Binding MH - Protein Conformation MH - Receptors, Antigen, T-Cell, alpha-beta/*chemistry/immunology/metabolism MH - T-Lymphocytes/cytology/*immunology/metabolism EDAT- 2012/10/11 06:00 MHDA- 2013/02/26 06:00 CRDT- 2012/10/11 06:00 PHST- 2012/10/11 06:00 [entrez] PHST- 2012/10/11 06:00 [pubmed] PHST- 2013/02/26 06:00 [medline] AID - 10.1111/j.1600-065X.2012.01159.x [doi] PST - ppublish SO - Immunol Rev. 2012 Nov;250(1):61-81. doi: 10.1111/j.1600-065X.2012.01159.x.