T cell receptor beta joining 2-1 (TRBJ2-1)

T cell receptor beta joining 2-1 (TRBJ2-1) is a gene segment in the beta chain locus of the T cell receptor (TCR), encoding a part of the J (joining) region of the TCR beta subunit in humans[1][4][8]. The TCR is formed through somatic V(D)J recombination, in which one Variable (V), one Diversity (D), and one Joining (J) segment are assembled to create a highly diverse repertoire of antigen-specific receptors on T lymphocytes[3][5]. TRBJ2-1 specifically contributes to the CDR3 (complementarity-determining region 3) loop of the TCR beta chain, a region critical for direct peptide-major histocompatibility complex (MHC) contact during antigen recognition[1][3]. While essential for the adaptive immune system and immune repertoire diversity, TRBJ2-1 itself is a gene segment, not a protein or receptor target of drugs, and is not typically considered a therapeutic target[1][8]. Its primary role is in genetic recombination to ensure T cell diversity and proper immune function[5]. If you are looking for information about the functional T cell receptor complex as a therapeutic target, refer to "T cell receptor (TCR), alpha/beta complex" as a canonical entity.

Other names

TCRBJ2S1TRBJ21TRBJ2-1