HLA-DR Antibody (YA4707)

HLA-DR Antibody (YA4707) is a Mouse-derived and non-conjugated monoclonal antibody, targeting to HLA-DR.

P01903

3122 [NCBI]

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Function：An alpha chain of antigen-presenting major histocompatibility complex class II (MHCII) molecule. In complex with the beta chain HLA-DRB, displays antigenic peptides on professional antigen presenting cells (APCs) for recognition by alpha-beta T cell receptor (TCR) on HLA-DR-restricted CD4-positive T cells. This guides antigen-specific T-helper effector functions, both antibody-mediated immune response and macrophage activation, to ultimately eliminate the infectious agents and transformed cells (PubMed:15265931, PubMed:15322540, PubMed:17334368, PubMed:22327072, PubMed:24190431, PubMed:27591323, PubMed:29884618, PubMed:31495665, PubMed:8145819, PubMed:9075930). Typically presents extracellular peptide antigens of 10 to 30 amino acids that arise from proteolysis of endocytosed antigens in lysosomes (PubMed:8145819). In the tumor microenvironment, presents antigenic peptides that are primarily generated in tumor-resident APCs likely via phagocytosis of apoptotic tumor cells or macropinocytosis of secreted tumor proteins (PubMed:31495665). Presents peptides derived from intracellular proteins that are trapped in autolysosomes after macroautophagy, a mechanism especially relevant for T cell selection in the thymus and central immune tolerance (PubMed:17182262, PubMed:23783831). The selection of the immunodominant epitopes follows two processing modes: 'bind first, cut/trim later' for pathogen-derived antigenic peptides and 'cut first, bind later' for autoantigens/self-peptides (PubMed:25413013). The anchor residue at position 1 of the peptide N-terminus, usually a large hydrophobic residue, is essential for high affinity interaction with MHCII molecules (PubMed:8145819)

Subcellular Localization：Cell membrane; Single-pass type I membrane protein; Endoplasmic reticulum membrane; Single-pass type I membrane protein; Early endosome membrane; Single-pass type I membrane protein; Late endosome membrane; Single-pass type I membrane protein; Lysosome membrane; Single-pass type I membrane protein; Autolysosome membrane; Single-pass type I membrane protein

Expression：
Tissue_specificity:Expressed in professional APCs: macrophages, dendritic cells and B cells (at protein level) (PubMed:15322540, PubMed:23783831, PubMed:31495665) . Expressed in thymic epithelial cells (at protein level) (PubMed:23783831)

Induction:Up-regulated in dendritic cells upon maturation

Subunit：Heterotrimer that consists of an alpha chain HLA-DRA, a beta chain HLA-DRB and a peptide (peptide-MHCII)

DASS-397D15.1 antibody; DR alpha chain antibody; DR alpha chain precursor antibody; DRA_HUMAN antibody; DRB1 antibody; DRB4 antibody; FLJ51114 antibody; Histocompatibility antigen HLA DR alpha antibody; Histocompatibility antigen HLA-DR alpha antibody; HLA class II histocompatibility antigen antibody; HLA class II histocompatibility antigen DR alpha chain antibody; HLA DR1B antibody; HLA DR3B antibody; HLA DRA antibody; HLA DRA1 antibody; HLA DRB1 antibody; HLA DRB3 antibody; HLA DRB4 antibody; HLA DRB5 antibody; HLA-DR histocompatibility type antibody; HLA-DRA antibody; HLADR4B antibody; HLADRA1 antibody; HLADRB antibody; Major histocompatibility complex class II DR alpha antibody; Major histocompatibility complex class II DR beta 1 antibody; Major histocompatibility complex class II DR beta 3 antibody; Major histocompatibility complex class II DR beta 4 antibody; Major histocompatibility complex class II DR beta 5 antibody; MGC117330 antibody; MHC cell surface glycoprotein antibody; MHC class II antigen DRA antibody; MHC II antibody; MLRW antibody; OTTHUMP00000029406 antibody; OTTHUMP00000029407 antibody; HLA-DRA nanobody;