The Juxtamembrane Domain of Butyrophilin BTN3A1 Controls Phosphoantigen-Mediated Activation of Human Vγ9Vδ2 T Cells.

Vγ9Vδ2 T lymphocytes are the major human peripheral γδ T cell subset, with broad reactivity against stressed human cells, including tumor cells. Vγ9Vδ2 T cells are specifically activated by small phosphorylated metabolites called phosphoantigens (PAg). Stress-induced changes in target cell PAg levels are specifically detected by butyrophilin (BTN)3A1, using its intracellular B30.2 domain. This leads to the activation of Vγ9Vδ2 T cells. In this study, we show that changes in the juxtamembrane domain of BTN3A1, but not its transmembrane domain, induce a markedly enhanced or reduced γδ T cell reactivity. There is thus a specific requirement for BTN3A1's juxtamembrane domain for correct γδ T cell-related function. This work identified, as being of particular importance, a juxtamembrane domain region of BTN3A molecules identified as a possible dimerization interface and that is located close to the start of the B30.2 domain. Copyright © 2017 by The American Association of Immunologists, Inc.

Citation

Cassie-Marie Peigné, Alexandra Léger, Marie-Claude Gesnel, Fabienne Konczak, Daniel Olive, Marc Bonneville, Richard Breathnach, Emmanuel Scotet. The Juxtamembrane Domain of Butyrophilin BTN3A1 Controls Phosphoantigen-Mediated Activation of Human Vγ9Vδ2 T Cells. Journal of immunology (Baltimore, Md. : 1950). 2017 Jun 01;198(11):4228-4234

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PMID: 28461569

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