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

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

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  • 中文名称：
    人HLA-DRB5重组蛋白
  • 货号：
    CSB-EP657235HU
  • 规格：
    ￥2328
  • 图片：
    • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
  • 其他：

产品详情

  • 纯度：
    Greater than 90% as determined by SDS-PAGE.
  • 基因名：
    HLA-DRB5
  • Uniprot No.：
    Q30154
  • 别名：
    DR beta-5 DR2-beta-2 Dw2 MHC class II antigen DRB5
  • 种属：
    Homo sapiens (Human)
  • 蛋白长度：
    Partial
  • 来源：
    E.coli
  • 分子量：
    27.1 kDa
  • 表达区域：
    30-227aa
  • 氨基酸序列
    GDTRPRFLQQDKYECHFFNGTERVRFLHRDIYNQEEDLRFDSDVGEYRAVTELGRPDAEYWNSQKDFLEDRRAAVDTYCRHNYGVGESFTVQRRVEPKVTVYPARTQTLQHHNLLVCSVNGFYPGSIEVRWFRNSQEEKAGVVSTGLIQNGDWTFQTLVMLETVPRSGEVYTCQVEHPSVTSPLTVEWRAQSESAQSK
    Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
  • 蛋白标签：
    N-terminal 6xHis-tagged
  • 产品提供形式：
    Liquid or 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.
  • 缓冲液：
    If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose.
  • 复溶：
    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°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
  • 储存条件：
    Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
  • 保质期：
    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.
  • 货期：
    3-7 business days
  • 注意事项：
    Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
  • Datasheet & COA：
    Please contact us to get it.

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HLA-DRB5 Proteins

靶点详情

  • 功能：
    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.
  • 基因功能参考文献：
    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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  • 亚细胞定位：
    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.
  • 蛋白家族：
    MHC class II family
  • 数据库链接：

    HGNC: 4953

    OMIM: 604776

    KEGG: hsa:3127

    STRING: 9606.ENSP00000364114

    UniGene: Hs.485130

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