Mouse type I natural killer T cell receptors (iNKT TCRs) use a single V alpha 14-J alpha 18 sequence and V beta s that are almost always V beta 8.2, V beta 7, or V beta 2, although the basis of this differential usage is unclear. We showed that the V beta bias occurred as a consequence of the CDR2 beta loops determining the affinity of the iNKT TCR for CD1d-glycolipids, thus controlling positive selection. Within a conserved iNKT-TCR-CD1d docking framework, these inherent V beta-CD1d affiniti...Expand abstract
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T cell receptor CDR2 beta and CDR3 beta loops collaborate functionally to shape the iNKT cell repertoire.
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