T cell receptor alpha joining 44 (TRAJ44)

T cell receptor alpha joining 44 (TRAJ44) refers to a specific **joining (J) gene segment** within the T cell receptor alpha (TRA) locus. TRAJ44 encodes part of the J region that, through somatic recombination, helps generate the vast diversity of T cell receptor (TCR) alpha chains. A T cell receptor is composed of an alpha (TRA) and beta (TRB) chain heterodimer; each chain is constructed from variable (V), joining (J), and, for the beta chain, diversity (D) segments, facilitating antigen recognition when complexed with major histocompatibility complex (MHC) molecules on the cell surface. TRAJ44 itself does not form a protein with direct signaling or ligand-binding function but rather participates as a genetic component in the assembly of the TCR alpha chain, essential for T cell-mediated immunity. It is not considered a direct therapeutic target or independent receptor; instead, it is a **gene segment** required for the proper function and diversity of TCRs[1][2][4][5][7].

Other names

TRAJ44