Abstract:
:The structure and amino acid diversity of the T-cell receptor (TCR), similar in nature to that of Fab portions of antibodies, would suggest that these proteins have a nearly infinite capacity to recognize antigen. Yet all currently defined native T cells expressing an α and β chain in their TCR can only sense antigen when presented in the context of a major histocompatibility complex (MHC) molecule. This MHC molecule can be one of many that exist in vertebrates, presenting small peptide fragments, lipid molecules, or small molecule metabolites. Here we review the pattern of TCR recognition of MHC molecules throughout a broad sampling of species and T-cell lineages and also touch upon T cells that do not appear to require MHC presentation for their surveillance function. We review the diversity of MHC molecules and information on the corresponding T-cell lineages identified in divergent species. We also discuss TCRs with structural domains unlike that of conventional TCRs of mouse and human. By presenting this broad view of TCR sequence, structure, domain organization, and function, we seek to explore how this receptor has evolved across time and been selected for alternative antigen-recognition capabilities in divergent lineages.
journal_name
Immunol Revjournal_title
Immunological reviewsauthors
Castro CD,Luoma AM,Adams EJdoi
10.1111/imr.12327subject
Has Abstractpub_date
2015-09-01 00:00:00pages
30-55issue
1eissn
0105-2896issn
1600-065Xjournal_volume
267pub_type
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journal_title:Immunological reviews
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更新日期:1985-10-01 00:00:00
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更新日期:2008-06-01 00:00:00
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更新日期:2007-04-01 00:00:00
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pub_type: 杂志文章,评审
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