Mouse anti-Human HLA-DR Monoclonal Antibody | anti-HLA-DR antibody

Mouse anti HLA-DR

Cat. Num. AAA570332

• Gene Names: HLA-DRA; MLRW; HLA-DRA1
• Reactivity: Human
• Applications: Flow Cytometry, Functional Assay, Immunocytochemistry, Immunohistochemistry, Immunoprecipitation, Western Blot
• Synonyms: HLA-DR; Monoclonal Antibody; Mouse anti HLA-DR; anti-HLA-DR antibody

• Host: Mouse
• Reactivity: Human
• Clonality: Monoclonal
• Isotype: IgG2a
• Clone Number: Bra30
• Specificity: The antibody Bra30 is directed against a monomorphic determinant of human HLA Class II. The antibody recognises an epitope on the HLA-DR molecule that is dependent on the association of both heavy and lights chains of the HLA class II molecule. The antibody does not cross react with either HLA-DP or HLA-DQ molecules. The antibody has not been tested for cross reactivity with other species.
• Form/Format: Each vial contains 500 ul 0.2 mg/ml purified monoclonal antibody in phosphated buffered saline (PBS) containing 50% glycerol + 0.2% bovine serum albumin (BSA) + 0.02% sodium azide.
• Sequence Length: 254

• Applicable Applications for anti-HLA-DR antibody: Flow Cytometry (FC/FACS), Immunocytochemistry (ICC), Immunohistology (frozen), Immunoprecipitation (IP), Western Blot (WB)
• Application Notes: The Bra30 antibody is suitable for the detection of HLA Class II antigen by flow cytometry, immunocytochemistry and immunohistochemistry on frozen tissues. The antibody is also suitable for the detection of HLA class II by immunoprecipitation and western blotting.; ; Optimal antibody dilutions for the different applications should be determined by titration.
• Source Note: Bra30 is a mouse monoclonal IgG2a antibody derived by fusion of mouse myeloma cells with cells from a mouse immunized with REH-6 cells, a human pre-B cell leukaemia cell line.
• Preparation and Storage: Store at 4 degree C, or in small aliquots at -20 degree C.

Related Product Information for anti-HLA-DR antibody

The major histocompatibility complex (MHC) is a cluster of genes that play an important role in the immune response. In humans, this complex is referred to as the Human Leucocyte Antigen (HLA) system and is located on chromosome 6. In humans the MHC II locus includes genes for alpha and beta subunits of the three class II MHC proteins HLA-DR, HLA-DQ and HLA-DP. The HLA class II alpha and beta genes are highly polymorphic with the exception of HLA-DR alpha gene, which is reported to be monomorphorphic. HLA class II glycoproteins are expressed as alpha/beta heterodimers on the surface of antigen presenting cells such as dendritic cells, B-cells and monocytes. Their primary function is to present foreign antigen derived peptides to CD4 positive T-cells. HLA-class II molecules also play an important role in developing and maintaining tolerance to self-antigens and in transplant rejection. HLA-DR molecules have been associated with a range of autoimmune diseases including rheumatoid arthritis, Grave's disease and multiple sclerosis.

Product Categories/Family for anti-HLA-DR antibody

Immunology

References

1. Poláková K, Karpatová M.(1990).Study of monomorphic determinants on DR molecules of HLA class II antigens. Neoplasma. 37:239-51.

2. Lahat N, Bitterman H, Weiss-Cerem L, Rahat MA.(2011). Hypoxia increases membranal and secreted HLA-DR in endothelial cells, rendering them T-cell activators.Transpl. Int. 24:1018-26.

NCBI and Uniprot Product Information

• NCBI GI #: 52426774
• NCBI GeneID: 3122
• NCBI Accession #: NP_061984.2
• NCBI GenBank Nucleotide #: NM_019111.4
• UniProt Accession #: P01903; Q30160; Q6IAZ1; Q861I2; Q9TP70; A2BET4
• Molecular Weight: 28,607 Da
• NCBI Official Full Name: HLA class II histocompatibility antigen, DR alpha chain
• NCBI Official Synonym Full Names: major histocompatibility complex, class II, DR alpha
• NCBI Official Symbol: HLA-DRA
• NCBI Official Synonym Symbols: MLRW; HLA-DRA1
• NCBI Protein Information: HLA class II histocompatibility antigen, DR alpha chain; MHC class II antigen DRA; MHC cell surface glycoprotein; histocompatibility antigen HLA-DR alpha
• UniProt Protein Name: HLA class II histocompatibility antigen, DR alpha chain
• UniProt Gene Name: HLA-DRA
• UniProt Synonym Gene Names: HLA-DRA1
• UniProt Entry Name: DRA_HUMAN

NCBI Description

HLA-DRA is one of the HLA class II alpha chain paralogues. This class II molecule is a heterodimer consisting of an alpha and a beta chain, both anchored in the membrane. It plays a central role in the immune system by presenting peptides derived from extracellular proteins. Class II molecules are expressed in antigen presenting cells (APC: B lymphocytes, dendritic cells, macrophages). The alpha chain is approximately 33-35 kDa and its gene contains 5 exons. Exon 1 encodes the leader peptide, exons 2 and 3 encode the two extracellular domains, and exon 4 encodes the transmembrane domain and the cytoplasmic tail. DRA does not have polymorphisms in the peptide binding part and acts as the sole alpha chain for DRB1, DRB3, DRB4 and DRB5. [provided by RefSeq, Jul 2008]

Uniprot Description

HLA-DRA: Binds peptides derived from antigens that access the endocytic route of antigen presenting cells (APC) and presents them on the cell surface for recognition by the CD4 T-cells. The peptide binding cleft accommodates peptides of 10-30 residues. The peptides presented by MHC class II molecules are generated mostly by degradation of proteins that access the endocytic route, where they are processed by lysosomal proteases and other hydrolases. Exogenous antigens that have been endocytosed by the APC are thus readily available for presentation via MHC II molecules, and for this reason this antigen presentation pathway is usually referred to as exogenous. As membrane proteins on their way to degradation in lysosomes as part of their normal turn-over are also contained in the endosomal/lysosomal compartments, exogenous antigens must compete with those derived from endogenous components. Autophagy is also a source of endogenous peptides, autophagosomes constitutively fuse with MHC class II loading compartments. In addition to APCs, other cells of the gastrointestinal tract, such as epithelial cells, express MHC class II molecules and CD74 and act as APCs, which is an unusual trait of the GI tract. To produce a MHC class II molecule that presents an antigen, three MHC class II molecules (heterodimers of an alpha and a beta chain) associate with a CD74 trimer in the ER to form a heterononamer. Soon after the entry of this complex into the endosomal/lysosomal system where antigen processing occurs, CD74 undergoes a sequential degradation by various proteases, including CTSS and CTSL, leaving a small fragment termed CLIP (class-II-associated invariant chain peptide). The removal of CLIP is facilitated by HLA-DM via direct binding to the alpha-beta-CLIP complex so that CLIP is released. HLA-DM stabilizes MHC class II molecules until primary high affinity antigenic peptides are bound. The MHC II molecule bound to a peptide is then transported to the cell membrane surface. In B-cells, the interaction between HLA-DM and MHC class II molecules is regulated by HLA-DO. Primary dendritic cells (DCs) also to express HLA-DO. Lysosomal miroenvironment has been implicated in the regulation of antigen loading into MHC II molecules, increased acidification produces increased proteolysis and efficient peptide loading. Belongs to the MHC class II family.

Protein type: Membrane protein, integral

Chromosomal Location of Human Ortholog: 6p21.3

Cellular Component: Golgi membrane; cell surface; late endosome membrane; lysosomal membrane; lysosome; integral to plasma membrane; plasma membrane; trans-Golgi network membrane; MHC class II protein complex

Molecular Function: MHC class II receptor activity; peptide antigen binding

Biological Process: peptide antigen assembly with MHC class II protein complex; cytokine and chemokine mediated signaling pathway; T cell costimulation; antigen processing and presentation of exogenous peptide antigen via MHC class II; immune response; cognition; T cell receptor signaling pathway; polysaccharide assembly with MHC class II protein complex; antigen processing and presentation of peptide or polysaccharide antigen via MHC class II

Disease: Hepatitis B Virus, Susceptibility To