ArticleNature immunology2026
SIRT2-mediated deacetylation of LCK governs the magnitude of T cell receptor signaling.
Article in Nature immunology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- SIRT2 deacylase modulators control B cell metabolic reprogramming in EBV infection and mitogenic activation.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
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21 authors.
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Abstract
T cell receptor (TCR) signaling is precisely tuned to prevent self-reactivity while allowing protective immunity. Here we found that acetylation modulated TCR signaling. The loss of SIRT2 deacetylase activity in T cells led to amplified calcium mobilization and phosphorylation of key proximal TCR molecules in naive T cells and reversed dampened TCR signaling in anergic T cells. During thymic selection, SIRT2 deficiency lowered the TCR signaling threshold and resulted in a broader TCR repertoire diversity. Mechanistically, we identified acetyl-lysine K228 on the linker region of LCK as a substrate specific for SIRT2 that governed LCK conformation and activity. SIRT2 inhibition in exhausted mouse and human tumor-infiltrating T cells restored TCR responsiveness and antitumor immunity. These findings highlighted SIRT2-modulated protein acetylation as a regulatory mechanism that set the TCR threshold in T cells.
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