Recombinant Human HLA-DQB1 protein (ab114251)



  • NatureRecombinant
  • SourceWheat germ
  • Amino Acid Sequence
    • AccessionP01920
    • SpeciesHuman
    • Molecular weight55 kDa including tags
    • Amino acids1 to 261
    • TagsGST tag N-Terminus

Associated products


Our Abpromise guarantee covers the use of ab114251 in the following tested applications.

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

  • Applications



    Western blot

  • FormLiquid
  • Additional notesProtein concentration is above or equal to 0.05 µg/µl
  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped on dry ice. Upon delivery aliquot and store at -80ºC. Avoid freeze / thaw cycles.

    pH: 8.00
    Constituents: 0.3% Glutathione, 0.79% Tris HCl

General Info

  • Alternative names
    • CELIAC1
    • DQ beta 1 chain
    • DQB1_HUMAN
    • HLA class II histocompatibility antigen
    • HLA class II histocompatibility antigen, DQ beta 1 chain
    • HLA class II histocompatibility antigen, DQ beta 2 chain
    • HLA DQB
    • HLA DQB1
    • HLA-DQB1
    • HLA-DQB2
    • IDDM1
    • Lymphocyte antigen
    • Major histocompatibility complex class II beta
    • Major histocompatibility complex, class II, DQ beta 1
    • MHC class II antigen DQB1
    • MHC class II antigen HLA DQ beta 1
    • MHC class II DQ beta chain
    • MHC class II HLA DQ beta glycoprotein
    • MHC class2 antigen
    • MHC DQ beta
    • OTTHUMP00000029167
    • OTTHUMP00000178569
    • OTTHUMP00000178570
    • OTTHUMP00000178571
    see all
  • 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 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.
  • 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.
  • Information by UniProt

Recombinant Human HLA-DQB1 protein images

  • ab114251 analysed by 12.5% SDS-PAGE and stained with Coomassie Blue.

References for Recombinant Human HLA-DQB1 protein (ab114251)

ab114251 has not yet been referenced specifically in any publications.

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