Download MendeleyStructural basis for CD8 + T cell recognition of the charge-reversed neoantigen UTP20 D2661H.
Wang, J., Li, S., Mao, L., Yang, D., Yao, Z., Shi, J., He, W., Wu, D.(2026) J Struct Biol : 108371-108371
- PubMed: 42727733 Search on PubMed
- DOI: https://doi.org/10.1016/j.jsb.2026.108371
- Primary Citation Related Structures:
9X7R, 9X7U, 9XME - PubMed Abstract:
Adoptive T cell therapy (ACT) eliminates tumors by infusing tumor reactive T cells. Neoantigens from somatic mutations are ideal targets due to their absence in normal tissues. How charge-reversing mutations drive neoantigen immunogenicity remains unclear. Here, we determined the wild-type and mutant UTP20-HLA-A2 structures and found them nearly identical except at the mutation site (Asp to His). The TCR-pHLA structure revealed selective recognition through specific interactions between CDR loops and the mutation site. Rosetta calculations showed that His provides favorable interactions absent in the wild-type. TCR engagement also induced a flip of the P6 side chain, reshaping the interface. These findings provide a structural basis for charge-reversed mutation-driven T cell responses and inform neoantigen-based ACT development.
- Laboratory of Structural Immunology, Hengyang Medical School, University of South China, Hengyang 421001, Hunan, China.
Organizational Affiliation:
