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Cell Biology of T Cell Receptor Expression and Regulation

Abstract : T cell receptors (TCRs) are protein complexes formed by six different polypeptides. In most T cells, TCRs are composed of αβ subunits displaying immunoglobulin-like variable domains that recognize peptide antigens associated with major histocompatibility complex molecules expressed on the surface of antigen-presenting cells. TCRαβ subunits are associated with the CD3 complex formed by the γ, δ, ε, and ζ subunits, which are invariable and ensure signal transduction. Here, we review how the expression and function of TCR complexes are orchestrated by several fine-tuned cellular processes that encompass (a) synthesis of the subunits and their correct assembly and expression at the plasma membrane as a single functional complex, (b) TCR membrane localization and dynamics at the plasma membrane and in endosomal compartments, (c) TCR signal transduction leading to T cell activation, and (d) TCR degradation. These processes balance each other to ensure efficient T cell responses to a variety of antigenic stimuli while preventing autoimmunity.
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Contributor : Vincenzo Di Bartolo Connect in order to contact the contributor
Submitted on : Friday, November 27, 2020 - 6:12:02 PM
Last modification on : Tuesday, May 3, 2022 - 6:18:18 PM




Andres Alcover, Balbino Alarcón, Vincenzo Di Bartolo. Cell Biology of T Cell Receptor Expression and Regulation. Annual Review of Immunology, 2018, 36 (1), pp.103-125. ⟨10.1146/annurev-immunol-042617-053429⟩. ⟨pasteur-03028889⟩



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