Anti-MHC Class II antibody [ER-TR3] (FITC) (ab15638)

Overview

• Product nameAnti-MHC Class II antibody [ER-TR3] (FITC)See all MHC Class II primary antibodies ...
• Description
  Rat monoclonal [ER-TR3] to MHC Class II (FITC)
• ConjugationFITC
• SpecificityThe antigen is found on B-cells, interdigitating cells and macrophages in peripheral lymphoid organs but is absent from T-cells. It is also expressed as a fine reticular pattern on stromal thymic cells of the cortex and as a confluent pattern on stromal thymic cells of the medulla.
• Tested applicationsFlow Cyt more details
• Species reactivity
  Reacts with: Mouse
  

  Does not react with

  Human
• Immunogen

  Full length native protein (purified) (Mouse).

• Positive controlMouse dendritic cells, B-cells and macrophages.

Properties

• FormLiquid
• Storage instructionsStore at +4°C. Do not freeze.
• Storage bufferPreservative: 0.01% Thimerosal
  Constituents: 10mg/ml BSA, PBS, pH 7.2
  
  
• Concentration information loading...
• PurityIgG fraction
• Purification notesPurified IgG from culture supernatant.
• Clonality Monoclonal
• Clone numberER-TR3
• IsotypeIgG2b
• Research Areas
  • Immunology
  • Adaptive Immunity
  • MHC
  • Class II

Applications

Target

• FunctionBinds 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 accomodates 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 an 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.
• Sequence similaritiesBelongs to the MHC class II family.
  Contains 1 Ig-like C1-type (immunoglobulin-like) domain.
• Cellular localizationCell membrane. Endoplasmic reticulum membrane. Golgi apparatus > trans-Golgi network membrane. Endosome membrane. Lysosome membrane. The MHC class II complex transits through a number of intracellular compartments in the endocytic pathway until it reaches the cell membrane for antigen presentation.

Target information above from: UniProt accession P04440 The UniProt Consortium
The Universal Protein Resource (UniProt) in 2010
Nucleic Acids Res. 38:D142-D148 (2010) .

Information by UniProt
• Database links
  • Entrez Gene: 100504404 Mouse

• Alternative names
  DMA antibodyDMB antibodyDP beta 1 antibody

  DP beta 1 chain antibodyDP(W4) beta chain antibodyDPB 1 antibodyDPB1 antibodyDPB1_HUMAN antibodyDRB antibodyH2Ea antibodyHLA class II histocompatibility antigen antibodyHLA class II histocompatibility antigen DM beta chain antibodyHLA DMB antibodyHLA DPB1 antibodyHLA-DP antibodyHLA-DP1B antibodyHLA-DPB antibodyHLA-DPB1 antibodyHLADM antibodyHLADP1B antibodyMajor histocompatibility complex class II antibodyMajor histocompatibility complex class II DP beta 1 antibodyMHC class II antigen DMB antibodyMHC class II antigen DPB1 antibodyMHC DPB1 antibodyRING6 antibodyRING7 antibody

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