Epitopes described in "T Cell receptor clonotype influences epitope hierarchy in the CD8+ T cell response to respiratory syncytial virus infection."

Article Authors:Padma Billam; Kathryn L Bonaparte; Jie Liu; Tracy J Ruckwardt; Man Chen; Alex B Ryder; Rui Wang; Pradyot Dash; Paul G Thomas; Barney S Graham
Article Title:T Cell receptor clonotype influences epitope hierarchy in the CD8+ T cell response to respiratory syncytial virus infection.
Reference Detail
Reference ID:1021619
Abstract:CD8+ T cell responses are important for recognizing and resolving viral infections. To better understand the selection and hierarchy of virus-specific T cell responses, we compared the T cell receptor (TCR) clonotype in parent and hybrid strains of respiratory syncytial virus-infected mice. K(d)M2(82-90) (SYIGSINNI) in BALB/c and D(b)M(187-195) (NAITNAKII) in C57Bl/6 are both dominant epitopes in parent strains but assume a distinct hierarchy, with K(d)M2(82-90) dominant to D(b)M(187-195) in hybrid CB6F1/J mice. The dominant K(d)M2(82-90) response is relatively public and is restricted primarily to the highly prevalent V13.2 in BALB/c and hybrid mice, whereas D(b)M(187-195) responses in C57BL/6 mice are relatively private and involve multiple V subtypes, some of which are lost in hybrids. A significant frequency of TCR CDR3 sequences in the D(b)M(187-195) response have a distinct "(D/E)WG" motif formed by a limited number of recombination strategies. Modeling of the dominant epitope suggested a flat, featureless structure, but D(b)M(187-195) showed a distinctive structure formed by Lys(7). The data suggest that common recombination events in prevalent V genes may provide a numerical advantage in the T cell response and that distinct epitope structures may impose more limited options for successful TCR selection. Defining how epitope structure is interpreted to inform T cell function will improve the design of future gene-based vaccines.
Affiliations:Vaccine Research Center, NIAID, National Institutes of Health, Bethesda, Maryland 20892-3017, USA.
Reference Type:Literature
PubMed ID:21118816
Journal:J Biol Chem
Journal Volume:286
Article Pages:4829-41
Journal ISSN:0021-9258
Article Chemical List:Complementarity Determining Regions;Epitopes, T-Lymphocyte;Receptors, Antigen, T-Cell, alpha-beta
Article MeSH List:Amino Acid Motifs; Animals; CD8-Positive T-Lymphocytes(immunology; metabolism); Chimera(genetics; immunology; metabolism); Complementarity Determining Regions(genetics; immunology; metabolism); Epitopes, T-Lymphocyte(genetics; immunology; metabolism); Mice; Mice, Inbred BALB C; Models, Immunological; Receptors, Antigen, T-Cell, alpha-beta(genetics; immunology; metabolism); Respiratory Syncytial Virus Infections(genetics; immunology; metabolism); Respiratory Syncytial Viruses(genetics; immunology; metabolism); Species Specificity
Curation Last Updated:2015-07-30 20:39:07