Major histocompatibility complex, class II, DQ beta 1 chain (HLA-DQB1)

Major histocompatibility complex, class II, DQ beta 1 chain (HLA-DQB1) is the beta-chain of the HLA-DQ heterodimer, a cell surface receptor essential for the function of antigen-presenting cells such as B lymphocytes, dendritic cells, and macrophages[1][2][3][4]. HLA-DQB1, together with its paired alpha chain (encoded by HLA-DQA1), forms the HLA-DQ molecule, which presents peptide antigens derived from extracellular proteins to CD4+ T lymphocytes, triggering adaptive immune responses[1][3][4]. This gene is highly polymorphic, with its encoded product exhibiting variability that determines peptide-binding specificity, influencing susceptibility to autoimmune and inflammatory diseases[4][5]. Specific HLA-DQB1 alleles are strongly associated with diseases such as celiac disease, type 1 diabetes, multiple sclerosis, and narcolepsy[2][3][4][5]. HLA-DQB1 typing is standard in transplantation to minimize graft-versus-host and rejection risks[1][2]. No drugs act directly on HLA-DQB1, but its variants are key biomarkers in disease susceptibility and transplant compatibility[2][4].

Other names

HLA class II histocompatibility antigen DQ beta 1 chainHLA-DQB1HLA-DQBMHC class II antigen DQB1IDDM1CELIAC1MHC class II DQ beta chainMHC class II HLA-DQ beta glycoproteinMHC class II antigen HLA-DQ-beta-1