Immunoglobulin heavy variable 2-5 (IGHV2-5)

Immunoglobulin heavy variable 2-5 (IGHV2-5) encodes the variable (V) region of the immunoglobulin heavy chain, a critical part of the antigen-binding site formed in B cell-derived antibodies. The IGHV2-5 gene is one member of the IGHV multigene family located within the immunoglobulin heavy-chain (IGH) locus, which undergoes recombination with diversity (D) and joining (J) segments during B cell development to generate antibody diversity. The V region, comprising three complementarity-determining regions (CDRs) and four framework regions, is responsible for specific antigen recognition and binding, shaping the adaptive immune response. IGHV2-5 features multiple allelic variants, contributing to the diversity of the antibody repertoire in humans; sequence polymorphisms, particularly in CDR1 and CDR2, affect antigen affinity and specificity. IGHV2-5 is not a therapeutic target (like receptor or enzyme); instead, it is a gene segment providing building blocks for antibody molecules. No drugs specifically target IGHV2-5, nor is it a biomarker for disease or drug response. Its clinical relevance is indirect—through its contribution to normal and abnormal antibody responses.

Other names

IGHV2-5Ig heavy chain V-II region HEIg heavy chain V-II region MCEIGHV25VHIg heavy chain V-II region 5immunoglobulin heavy chain variable region

Not applicable (IGHV2-5 is not directly targeted by drugs; its role is inherent to the antigen-binding diversity in antibodies.)