Overview

  • Product name
  • Description
    Rabbit polyclonal to HLA DRB3
  • Host species
    Rabbit
  • Tested applications
    Suitable for: IHC-P, WBmore details
  • Species reactivity
    Reacts with: Mouse, Rat, Human
  • Immunogen

    Recombinant full length protein corresponding to Human HLA DRB3.
    Database link: P79483

  • Positive control
    • Raji cell extracts.

Properties

  • Form
    Liquid
  • Storage instructions
    Shipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C long term. Avoid freeze / thaw cycle.
  • Storage buffer
    pH: 7.3
    Preservative: 0.02% Sodium azide
    Constituents: 50% Glycerol, 49% PBS
  • Concentration information loading...
  • Purity
    Protein A purified
  • Clonality
    Polyclonal
  • Isotype
    IgG
  • Research areas

Applications

Our Abpromise guarantee covers the use of ab175121 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
IHC-P 1/50 - 1/200.

ab171870 - Rabbit polyclonal IgG, is suitable for use as an isotype control with this antibody.

WB 1/500 - 1/2000. Predicted molecular weight: 30 kDa.

Target

  • Function
    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 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 similarities
    Belongs to the MHC class II family.
    Contains 1 Ig-like C1-type (immunoglobulin-like) domain.
  • Post-translational
    modifications
    Ubiquitinated by MARCH1 and MARCH8 at Lys-254 leading to sorting into the endosome system and down-regulation of MHC class II.
  • Cellular localization
    Cell membrane. Endoplasmic reticulum membrane. Golgi apparatus > trans-Golgi network membrane. Endosome membrane. Lysosome membrane. Late endosome 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.
  • Information by UniProt
  • Database links
  • Alternative names
    • DR beta 3 chain antibody
    • DR7 antibody
    • DRB3_HUMAN antibody
    • HLA class II histocompatibility antigen antibody
    • HLA class II histocompatibility antigen DR beta 3 chain antibody
    • HLA class II histocompatibility antigen DRB1 7 beta chain antibody
    • HLA DR3B antibody
    • HLA-DRB3 antibody
    • Human leucocyte antigen DRB3 antibody
    • Major histocompatibility complex class II DR beta 3 antibody
    • MGC117330 antibody
    • MHC class II antigen DR beta 3 chain antibody
    • MHC class II antigen DRB3 antibody
    • MHC class II HLA DR beta 3 chain antibody
    see all

Images

  • Anti-HLA DRB3 antibody (ab175121) at 1/500 dilution + Raji cell extracts

    Predicted band size: 30 kDa

References

ab175121 has not yet been referenced specifically in any publications.

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Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"

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