T cell receptor alpha joining 50 (TRAJ50)

T cell receptor alpha joining 50 (TRAJ50) is a gene segment that encodes one of the joining (J) regions within the T cell receptor (TCR) alpha (TRA) locus[1][6][3]. TCRs are heterodimeric molecules expressed on T lymphocytes, responsible for recognizing antigenic peptides presented by major histocompatibility complex (MHC) molecules on antigen-presenting cells[1][2][6]. The TRAJ50 segment is one of many such J segments that, through somatic recombination, contribute to the diversity of the T cell receptor repertoire required for adaptive immunity[1][2]. The function of TRAJ50 is structural and genetic, as one recombination component for constructing the complete variable domain of the TCR alpha chain, rather than acting as a protein receptor or drug target itself[1][3][6]. Key Notes for Target Mapping and Curation: - **TRAJ50 is not itself a standalone druggable target or protein:** it is a genomic J segment that contributes to the diversity of TCR alpha chains via genetic recombination. - It is not the full T cell receptor alpha chain, nor the T cell receptor as a whole. - References frequently designate it as “TRAJ50” or “T cell receptor alpha joining 50”[1][6][3], with no other common aliases for the segment. - TRAJ50 is part of the TCR gene locus (on chromosome 14 in humans), within the immune receptor gene family[1][6][7]. - **If an entry or context requires a therapeutic target, this should point instead to targets like “T cell receptor alpha chain” or “T cell receptor”** (full-length receptor or complex, not an individual J gene segment). In summary, “TRAJ50” designates a specific J region gene within the TCR alpha locus. It should not be considered a drug target, receptor, or protein but instead as a genomic segment crucial for TCR diversity[1][2][6].

Other names

TRAJ50Traj50 (mouse)