Immunoglobulin heavy constant alpha 1 (IGHA1)

Immunoglobulin heavy constant alpha 1 (IGHA1) encodes the constant region of the alpha heavy chain of immunoglobulin A1 (IgA1), the major class of antibody found in mucosal secretions. IgA1 plays a central role in adaptive immunity by binding antigens and facilitating their elimination, particularly at mucosal surfaces such as the gut, respiratory tract, and urogenital tract. Structurally, IgA1 features a unique, extended hinge region that confers flexibility but also susceptibility to specific bacterial proteases. IGHA1 expression is primarily restricted to B lymphocytes and plasma cells. Alterations in IGHA1 production or structure have clinical significance in infections, autoimmune diseases, and plasma cell malignancies. IGHA1 itself is not considered a classic drug target, but its presence and quantity have utility as a diagnostic biomarker in immunodeficiency and hematological cancers[1][2][3][4][5].

Other names

Ig alpha-1 chain C regionIgA1immunoglobulin alpha 1Ig alpha-1 chain C region BURIg alpha-1 chain C region TROimmunoglobulin heavy chain constant region alpha 1AI661180IGA1MYELOMASNC73TRO alpha1 Himmunoglobulin heavy constant α 1BAC87456.1LOC380791MGC27165

Not directly targeted by drugs as a therapeutic receptor; involved in antigen recognition and immune complex formation Drugs or therapies may influence its expression as part of plasma cell or B cell modulation Sometimes monitored as part of immunoglobulin replacement or depletion therapies[4][5]