Recombinant Human HLA class II histocompatibility antigen, DR beta 5 chain (HLA-DRB5), partial

Code CSB-YP657235HU
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Source Yeast
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Code CSB-EP657235HU-B
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Source E.coli
Conjugate Avi-tag Biotinylated
E. coli biotin ligase (BirA) is highly specific in covalently attaching biotin to the 15 amino acid AviTag peptide. This recombinant protein was biotinylated in vivo by AviTag-BirA technology, which method is BriA catalyzes amide linkage between the biotin and the specific lysine of the AviTag.
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Code CSB-BP657235HU
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Source Baculovirus
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Code CSB-MP657235HU
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Source Mammalian cell
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Product Details

>85% (SDS-PAGE)
Target Names
Uniprot No.
Alternative Names
DR 9; DR beta 5; DR beta 5 chain; DR beta-5; DR beta5; DR2 beta 2; DR2-beta-2; DR9; DRB5_HUMAN; Dw2; FLJ76359; HLA class II histocompatibility antigen; HLA class II histocompatibility antigen DR beta 5 chain; HLA class II histocompatibility antigen DRB1-9 beta chain; HLA class II histocompatibility antigen; DR-5 beta chain; HLA DRB; HLA-DRB5; Human leucocyte antigen DRB5; Leukocyte antigen class II; Major histocompatibility complex; class II; DR beta 51; MHC class II antigen DRB1*9; MHC class II antigen DRB5; MHC class II HLA beta chain; MHC HLA-DR-beta cell surface glycoprotein; MHC HLA-DR-beta chain
Homo sapiens (Human)
Protein Length
Tag Info
Tag type will be determined during the manufacturing process.
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer before Lyophilization
Tris/PBS-based buffer, 6% Trehalose, pH 8.0
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
Troubleshooting and FAQs
Storage Condition
Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time
Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Please contact us to get it.

Customer Reviews and Q&A

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We are trying to develop a multiplexing assay on Luminex to detect the HLA Class I and II antibodies in individuals.
We are looking for manufacturer who can provide us human derived recombined HLA class I and II antigens, checked on your website
and find some Locus antigens are available with you. For the panel designing we need antigens of locu DRB5.
Could you please provide some idea about it?

As to your request for the antigen of DRB5, please check detailed information as follows:
We can provide all of these antigens expressed by our four expression systems: E.coli, Yeast, Baculovirus and Mammalian Cell, please check and confirm which expression system you need.
Recombinant Human HLA class II histocompatibility antigen, DR beta 5 chain(HLA-DRB5),partial
CSB-YP657235HU >> Yeast
CSB-EP657235HU >> E.coli
CSB-BP657235HU >> Baculovirus
CSB-MP657235HU >> Mammalian cell
Expression Region:30-227aa; Partial, provide the complete extracellular domain.
Tag information:Tag type will be determined during the manufacturing process.
The expected tag for each expression system is listed as follows: YP: N-terminal 6xHis-tagged; EP, BP, MP: N-terminal 10xHis-tagged and C-terminal Myc-tagged.


Target Background

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.
Gene References into Functions
  1. Variation at HLA-DRB5 being associated both with Parkinson's disease and Alzheimer's disease, ariation at HLA-DRB5 being associated both with Parkinson's disease and Alzheimer's disease. PMID: 27713094
  2. This study identified genetic overlap between Alzheimer disease and immune-mediated diseases, implicating the HLA locus and IPMK in the pathobiology of Alzheimer disease. PMID: 27088644
  3. HLA-DRB5 affects type 1 diabetes risk and islet autoantibodies. PMID: 26740600
  4. Brain DNA methylation in HLA-DRB5 was associated with pathological Alzheimer disease. PMID: 25365775
  5. findings indicated that copy number variants of HLA-DRB5 was associated with the risk of systemic lupus erythematosus, and copy number deletion appeared to be protective for SLE. PMID: 24366815
  6. DRB5*01:01 is associated with Thai systemic lupus erythematosus; the association is stronger than that of DRB1*15:01; genetic contribution of DRB5*01:01 is due partially to linkage disequilibrium between DRB1*16:02 and DRB5*01:01 in northern Thai population PMID: 22862923
  7. HLA-DRB5 was highly expressed in peripheral blood mononuclear cells from patients with systemic sclerosis-related interstitial lung disease. The HLA-DRB5*01:05 allele is a risk factor for interstitial lung disease in patients with systemic sclerosis. PMID: 22723597
  8. Transgenic mice expressing HLA-DRB5*01:01 genes are crossed with histocompatibility class (MHC) II knockout mice to replace mouse MHC class II genes with human MHC class II genes in a humanized model of autoimmunity. PMID: 22888134
  9. Eighteen out of 19 individuals showed HLA-DRB5, and none of the HLA-DRB5*null individuals, carried the HLADRB1* 15 allele. The findings support a contribution for HLA-DRB5 in keloid pathogenesis. PMID: 22033527
  10. HLA-DRB5 was found to have bimodal expression in human skeletal muscle tissue. PMID: 21299892
  11. In our study, we found that the HLA-DR9 allele and HPV16E6 infection had a function of synergy in the process of malignant transformation of esophageal epithelial cells, and jointly promoting the occurrence and development of esophageal cancer. PMID: 20193235
  12. the identification of a new HLA-DRB5 allele found in two members of a British Caucasoid family. PMID: 14617041
  13. hMBP82-100-specific type B T cells escaped tolerance in HLA-DRB5*0101 Tg mice PMID: 18713991
  14. the gene frequency of HLADR5 was significantly decreased in the total group of patients with autoimmune liver disease PMID: 19811438

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Subcellular Location
Cell membrane; Single-pass type I membrane protein. Endoplasmic reticulum membrane; Single-pass type I membrane protein. Golgi apparatus, trans-Golgi network membrane; Single-pass type I membrane protein. Endosome membrane; Single-pass type I membrane protein. Lysosome membrane; Single-pass type I membrane protein. Late endosome membrane; Single-pass type I membrane protein. Note=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.
Protein Families
MHC class II family
Database Links

HGNC: 4953

OMIM: 604776

KEGG: hsa:3127

STRING: 9606.ENSP00000364114

UniGene: Hs.485130

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