[Nature, Classic] T-Cell Receptor: The Ig Family Reunion We Didn't See Coming! скачать в хорошем качестве

[Nature, Classic] T-Cell Receptor: The Ig Family Reunion We Didn't See Coming!

This podcast episode delves into the landmark 1984 Nature paper, "Sequence relationships between putative T-cell receptor polypeptides and immunoglobulins," authored by Stephen M. Hedrick, Ellen A. Nielsen, Joshua Kavaler, David I. Cohen, and Mark M. Davis. You can access this pivotal research via its DOI: https://doi.org/10.1038/308153a0. Prior to this study, immunologists had unraveled B-cell antibody diversity but struggled to identify the elusive antigen-binding receptor on T lymphocytes, which remained a crucial gap in understanding adaptive immunity. The Davis laboratory aimed to close this gap by identifying T-cell-specific sequences. They employed an innovative subtractive cDNA hybridisation strategy, leading to the cloning and sequencing of two polypeptides, Ti-α and Ti-β. Crucially, sequence alignment revealed these polypeptides contained immunoglobulin-like domains, and their genes underwent rearrangement akin to antibodies, demonstrating lineage specificity. This work provided the first molecular evidence that T cells deploy an Ig-related gene family as their antigen receptor, unifying B- and T-cell recognition under a common molecular logic and cementing the concept of a clonotypic TCR. It was a paradigm-shifting milestone that fundamentally defined modern T-cell biology.