The T-cell receptor on the surface of T cells requires antigen recognition to function. Structural studies reveal that its predecessor, the pre-T-cell receptor, is much more independent. See Letter p.844
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Malissen, B., Luche, H. Egocentric pre–T–cell receptors. Nature 467, 793–794 (2010). https://doi.org/10.1038/467793a
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DOI: https://doi.org/10.1038/467793a
Jose Ordovas-Montanes
I would just like to comment on the concluding sentence and bring to the attention of the authors that there is already very suggestive evidence that the pre-B-cell receptor is also functioning through ligand-independent dimerization. (1) This was published this year in Nature Immunology and describes a role for which binding of surrogate light chain to a glycosylation residue present only on uHC can mediate autonomous cross-linking of the BCR and delivery of survival signals.
1. Ubelhart, R., et al. (2010). N-linked glycosylation selectively regulates autonomous precursor BCR function. Nature Immunology. 11: 759-766.