Mouse anti-Human, Pig HLA-DQ Monoclonal Antibody | anti-HLA-DQ antibody

HLA-DQ (MHC II) Mouse Monoclonal Antibody

Cat. Num. AAA439067

• Gene Names: HLA-DQA1; CD; GSE; DQ-A1; CELIAC1; HLA-DQA
• Reactivity: Human, Pig
• Applications: Flow Cytometry, Functional Assay, Immunofluorescence
• Synonyms: HLA-DQ; Monoclonal Antibody; HLA-DQ (MHC II) Mouse Monoclonal Antibody; CELIAC1; DC 4 alpha chain Gluten sensitive enteropathy (celiac disease) (GSE); HLA Class II DQ; HLA class II histocompatibility antigen DQ; HLA class II histocompatibility antigen DQ(1) alpha chain; HLA class II histocompatibility antigen DQ(3) alpha chain; HLA DQA1; HLA DQB; HLA DQB1; IDDM1; Leucocyte antigen DQA1; Major histocompatibility complex class II DQ alpha 1; Major histocompatibility complex class II DQ beta 1; MHC class II antigen HLA DQ beta 1; MHC class II HLA DQ alpha 1; MHC class II HLA DQ beta glycoprotein; MHC DQ beta; MHC HLA DQ alpha; anti-HLA-DQ antibody

• Host: Mouse
• Reactivity: Human, Pig
• Clonality: Monoclonal
• Isotype: IgG2a, kappa
• Clone Number: SPM422
• Specificity: Recognizes a DQ antigen, which is a dimer of 60kDa. The class II molecule is a heterodimer consisting of an alpha (DQA) and a beta chain (DQB), 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 33-35kDa. It is encoded by 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. Within the DQ molecule both the alpha chain and the beta chain contain the polymorphisms specifying the peptide binding specificities, resulting in up to four different molecules. Typing for these polymorphisms is routinely done for bone marrow transplantation. This MAb strongly blocks cytotoxicity activity of T4-positive cytotoxic T cell clones.
• Form/Format: 200ug/ml of Ab purified from Bioreactor Concentrate by Protein A/G. Prepared in 10mM PBS with 0.05% BSA & 0.05% azide. Also available WITHOUT BSA & azide at 1.0mg/ml.
• Sequence Length: 255

• Applicable Applications for anti-HLA-DQ antibody: Flow Cytometry (FC/FACS), Immunofluorescence (IF)
• Application Notes: Flow Cytometry (0.5-1ug/million cells in 0.1ml); Immunofluorescence (0.5-1ug/ml); ; Optial dilution for a specific application should be determined.
• Cellular Localization: Cell Surface
• Immunogen: T4-positive CTL clone HG-38
• Hu-Chromosome Location: 6p21.3
• Positive Control: Raji cells. Tonsil or lymph node
• Preparation and Storage: Antibody with azide - store at 2 to 8°C. Non-hazardous. No MSDS required.

Flow Cytometry (FC)

(Flow Cytometric Analysis of Raji cells. HLA-DQ Mouse Monoclonal Antibody (SPM422) followed by goat anti-Mouse IgG-CF488 (Blue); Isotype Control (Red).)

References

Spits H; Keizer G; Borst J; Terhorst C; Hekman A; de Vries JE. Characterization of monoclonal antibodies against cell surface molecules associated with cytotoxic activity of natural and activated killer cells and cloned CTL lines. Hybridoma, 1983, 2(4):423-37. Spits H., Borst J., Giphan M., Coligan J., Terhorst C. and de Vries J., Eur. J. Immunol. 14, (1984). Bontrop R., Schreuder G., Mikalski E., van Miltenburg R. and Giphan M., Tissue Antigens, 27, (1986).

NCBI and Uniprot Product Information

• NCBI GI #: 18426975
• NCBI GeneID: 3117
• NCBI Accession #: NP_002113.2
• NCBI GenBank Nucleotide #: NM_002122.3
• UniProt Accession #: P01908; O19630; O19706; P01907; P04225; P04226; P05536; P79553; Q06751; Q29876; Q29994; P01909
• Molecular Weight: 60kDa
• NCBI Official Full Name: HLA class II histocompatibility antigen, DQ alpha 1 chain
• NCBI Official Synonym Full Names: major histocompatibility complex, class II, DQ alpha 1
• NCBI Official Symbol: HLA-DQA1
• NCBI Official Synonym Symbols: CD; GSE; DQ-A1; CELIAC1; HLA-DQA
• NCBI Protein Information: HLA class II histocompatibility antigen, DQ alpha 1 chain
• UniProt Protein Name: HLA class II histocompatibility antigen, DQ alpha 1 chain
• UniProt Gene Name: HLA-DQA1
• UniProt Entry Name: DQA1_HUMAN

NCBI Description

HLA-DQA1 belongs to the HLA class II alpha chain paralogues. The class II molecule is a heterodimer consisting of an alpha (DQA) and a beta chain (DQB), 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. It is encoded by 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. Within the DQ molecule both the alpha chain and the beta chain contain the polymorphisms specifying the peptide binding specificities, resulting in up to four different molecules. Typing for these polymorphisms is routinely done for bone marrow transplantation. [provided by RefSeq, Jul 2008]

Uniprot Description

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 microenvironment has been implicated in the regulation of antigen loading into MHC II molecules, increased acidification produces increased proteolysis and efficient peptide loading.