Structural highlights
Function[HA11_MOUSE] Involved in the presentation of foreign antigens to the immune system. [B2MG_MOUSE] Component of the class I major histocompatibility complex (MHC). Involved in the presentation of peptide antigens to the immune system. Publication Abstract from PubMedImmune response (Ir) genes, originally proposed by Baruj Benacerraf to explain differential antigen-specific responses in animal models, have become synonymous with the major histocompatibility complex (MHC). We discovered a non-MHC-linked Ir gene in a T cell receptor (TCR) locus that was required for CD8(+) T cell responses to the Plasmodium berghei GAP5040-48 epitope in mice expressing the MHC class I allele H-2D(b). GAP5040-48-specific CD8(+) T cell responses emerged from a very large pool of naive Vbeta8.1(+) precursors, which dictated susceptibility to cerebral malaria and conferred protection against recombinant Listeria monocytogenes infection. Structural analysis of a prototypical Vbeta8.1(+) TCR-H-2D(b)-GAP5040-48 ternary complex revealed that germline-encoded complementarity-determining region 1beta residues present exclusively in the Vbeta8.1 segment mediated essential interactions with the GAP5040-48 peptide. Collectively, these findings demonstrated that Vbeta8.1 functioned as an Ir gene that was indispensable for immune reactivity against the malaria GAP5040-48 epitope. A T Cell Receptor Locus Harbors a Malaria-Specific Immune Response Gene.,Van Braeckel-Budimir N, Gras S, Ladell K, Josephs TM, Pewe L, Urban SL, Miners KL, Farenc C, Price DA, Rossjohn J, Harty JT Immunity. 2017 Nov 21;47(5):835-847.e4. doi: 10.1016/j.immuni.2017.10.013. Epub, 2017 Nov 14. PMID:29150238[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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