HLA-DP beta 1-restricted peptide complex (HLA-DPB1-peptide complex)

The **HLA-DP beta 1-restricted peptide complex** is a cell surface receptor complex formed by the HLA-DPB1 protein (a major histocompatibility complex class II beta chain) and an antigenic peptide. This complex is expressed primarily on professional antigen-presenting cells such as dendritic cells, macrophages, and B lymphocytes. Together with the HLA-DPA1 alpha chain, HLA-DPB1 forms a heterodimer that binds peptides derived from extracellular antigens and presents them on the cell surface for recognition by CD4+ T cells. The ability of HLA-DPB1 to bind and display various peptides is fundamental to shaping adaptive immune responses against pathogens, determining compatibility for organ transplantation, and influencing susceptibility to autoimmune diseases and some cancers. The HLA-DPB1*04:01 allele is a common variant with relevance for disease association studies and transplantation immunology. Peptides presented by the HLA-DPB1*04-restricted complex are targets for T cell recognition, and this interaction is leveraged in some immunotherapeutic strategies[1][2][3][6].

Other names

HLA-DPB1*04:01-peptide complexHLA-DP1-peptide complexMHC class II, DP beta 1-peptide complexHuman leukocyte antigen DPB1-peptide complex

Presentation of antigenic peptides to CD4+ T cells, initiating antigen-specific immune responses[1][2][3] In cancer immunotherapy, vaccines or engineered T cells may recognize peptides presented by the HLA-DPB1*04:01 complex