TCR Vβ11 Antigen

TCR Vβ11 is also called TCRBV11S1. Vβ11 is the human variable β11 chain of the T cell receptor. Two Vβ11 sequences are described, PL3.12 and PH15. These sequences differ only in their leader sequence and therefore lead to the same mature protein. An invariant Vα24/Vβ11 T cell receptor is expressed in all individuals by clonal expanded CD4– CD8– T cells, reactive to bacterial antigens. This unique lymphocyte population restricted by the CD1d molecule recognition has been identified as the natural killer T (NKT) cells. Vβ11 is expressed by 0.4% to 0.9% of peripheral CD3+ cells in normal blood. This sequence is also referred to as TRBV25-1 (based on the IMGT gene nomenclature).