Abstract
Immunoreceptors have crucial roles in sensing environmental signals and initiating immune responses to protect the host. Dysregulation of immunoreceptor signalling can therefore lead to a range of diseases, making immunoreceptor-based therapies a promising frontier in biomedicine. A common feature of various immunoreceptors is the basic-residue-rich sequence (BRS), which is a largely unexplored aspect of immunoreceptor signalling. The BRS is typically located in the cytoplasmic juxtamembrane region of immunoreceptors, where it forms dynamic interactions with neighbouring charged molecules to regulate signalling. Loss or gain of the basic residues in an immunoreceptor BRS has been linked to severe human diseases, such as immunodeficiency and autoimmunity. In this Perspective, we describe the role of BRSs in various immunoreceptors, elucidating their signalling mechanisms and biological functions. Furthermore, we highlight pathogenic mutations in immunoreceptor BRSs and discuss the potential of leveraging BRS signalling in engineered T cell-based therapies.
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Acknowledgements
C.X. is funded by a Ministry of Science and Technology of the Peoples’s Republic of China (MOST) grant (2023YFA1800200), a Chinese Academy of Sciences (CAS) grant (YSBR-014) and a Science and Technology Commission of Shanghai Municipality (STCSM) grant (23J21901300). X.S. is funded by a MOST grant (2023YFA0915700). We thank H. Wang for discussion and proof-reading.
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C.X. composed the paper. X.S. and X.H. contributed to discussions. C.X. and X.S. wrote the paper and X.H. prepared the figures. X.S. collected the references and performed bioinformatic analyses.
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Nature Reviews Immunology thanks Susana Minguet, who co-reviewed with Nadine Woessner, Wanli Liu, who co-reviewed with Chenguang Xu, and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.
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Shi, X., He, X. & Xu, C. Charge-based immunoreceptor signalling in health and disease. Nat Rev Immunol 25, 298–311 (2025). https://doi.org/10.1038/s41577-024-01105-6
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DOI: https://doi.org/10.1038/s41577-024-01105-6


