Recombinant Human HLA-DR protein (His tag) (ab237748)
Key features and details
- Expression system: Escherichia coli
- Purity: > 85% SDS-PAGE
- Tags: His tag N-Terminus
- Suitable for: SDS-PAGE
Description
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Product name
Recombinant Human HLA-DR protein (His tag)
See all HLA-DR proteins and peptides -
Purity
> 85 % SDS-PAGE. -
Expression system
Escherichia coli -
Accession
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Protein length
Full length protein -
Animal free
No -
Nature
Recombinant -
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Species
Human -
Sequence
IKEEHVIIQAEFYLNPDQSGEFMFDFDGDEIFHVDMAKKETVWRLEEFGR FASFEAQGALANIAVDKANLEIMTKRSNYTPITNVPPEVTVLTNSPVELR EPNVLICFIDKFTPPVVNVTWLRNGKPVTTGVSETVFLPREDHLFRKFHY LPFLPSTEDVYDCRVEHWGLDEPLLKHWEFDAPSPLPETTENVVCALGLT VGLVGIIIGTIFIIKGVRKSNAAERRGPL -
Predicted molecular weight
30 kDa including tags -
Amino acids
26 to 254 -
Tags
His tag N-Terminus -
Additional sequence information
This product is the mature full length protein from aa 26 to 254. The signal peptide is not included.
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Associated products
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Related Products
Specifications
Our Abpromise guarantee covers the use of ab237748 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
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Applications
SDS-PAGE
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Form
Liquid -
Concentration information loading...
Preparation and Storage
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Stability and Storage
Shipped at 4°C. Store at -20°C or -80°C. Avoid freeze / thaw cycle.
Constituents: Tris buffer, 50% Glycerol (glycerin, glycerine)
General Info
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Alternative names
- DASS-397D15.1
- DR alpha chain
- DR alpha chain precursor
see all -
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 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 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
modificationsUbiquitinated by MARCH1 or MARCH8 at Lys-244 leading to down-regulation of MHC class II. When associated with ubiquitination of the beta subunit of HLA-DR: HLA-DRB4 'Lys-254', the down-regulation of MHC class II may be highly effective. -
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
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Protocols
To our knowledge, customised protocols are not required for this product. Please try the standard protocols listed below and let us know how you get on.
Datasheets and documents
References (0)
ab237748 has not yet been referenced specifically in any publications.