UpTCR: a unified progressive knowledge transfer foundation model for robust T-cell receptor-antigen binding recognition
Abstract T-cell receptor (TCR) recognition of antigenic peptides presented by human leukocyte antigen (HLA) molecules underpins adaptive immunity and T cell-based immunotherapy. However, the scarcity of complete interaction data and TCR cross-reactivity challenge robust prediction. Here, we present UpTCR, a unified progressive knowledge-transfer foundation model that learns from incomplete data to predict TCR-antigen-HLA binding. UpTCR progressively transfers knowledge from dimeric and trimeric interactions to tetrameric complexes and uses soft contrastive learning to mitigate false negatives. It outperforms existing methods in predicting TCR binding specificity and antigen-HLA binding affinity, particularly for neoantigens, and reveals pairwise residue-level interactions across the tetramer. UpTCR also transfers effectively to breast cancer cohorts with limited data. Prospective validation against melanoma antigen variants identifies eight immunogenic peptides that elicit T cell responses and one variant associated with immune escape. These findings establish UpTCR as a generalizable and interpretable tool for studying antigen recognition and advancing TCR-based immunotherapies.
Authors
- Zhenchao Tang (ORCID: https://orcid.org/0000-0003-4258-1301)
- Jiansong Fan (ORCID: https://orcid.org/0000-0002-4453-3840)
- Jiashu Han (ORCID: https://orcid.org/0009-0007-4000-9893)
- Tianxu Lv (ORCID: https://orcid.org/0009-0006-8192-9330)
- Maiyi Zhong
- Chenyi Lei (ORCID: https://orcid.org/0000-0001-6287-3673)
- Xiang Pan (ORCID: https://orcid.org/0000-0002-7671-518X)
- Yixuan Huang (ORCID: https://orcid.org/0000-0003-2162-4544)
- Xiaoqing Lian (ORCID: https://orcid.org/0000-0001-8662-257X)
- Dandan Meng (ORCID: https://orcid.org/0000-0002-9406-9986)
- Kai Miao (ORCID: https://orcid.org/0000-0003-4832-3354)
- Lihua Li (ORCID: https://orcid.org/0000-0003-0435-6453)
- Xiao Liu (ORCID: https://orcid.org/0000-0002-8073-0534)
- Bing He (ORCID: https://orcid.org/0000-0003-1719-9290)
- Jianhua Yao (ORCID: https://orcid.org/0000-0001-9157-9596)
- Zihan Feng
- Dawei Huang (ORCID: https://orcid.org/0000-0003-0732-1467)
- Shouzhi Chen (ORCID: https://orcid.org/0000-0001-7016-5335)
- Zheyu Hu
- Jiale Zhou
- Fei Ye
- Pengjiang Qian
- Li Chen
- Yuan Liu
- Yang Xiao
Institutions
- Jiangnan University (CN)
- Chinese Academy of Medical Sciences & Peking Union Medical College (CN)
- University of Macau (MO)
- Tencent (China) (CN)
- Peking Union Medical College Hospital (CN)
- University Town of Shenzhen (CN)
- Tsinghua–Berkeley Shenzhen Institute (CN)
- Tsinghua Shenzhen International Graduate School (CN)
- Hangzhou Dianzi University (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2026-09-24
- DOI
- https://doi.org/10.1038/s41467-026-78075-x
- Primary Topic
- vaccines and immunoinformatics approaches
- Type
- article
- Field-Weighted Citation Impact
- 0.00