| Product Name |
Recombinant Human HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) Protein |
| Product Overview |
This recombinant human HLA Class II Histocompatibility Antigen, DR Alpha Chain (HLA-DRA) protein includes amino acids 27-216aa of the target gene is expressed in E.coli.The protein is supplied in lyophilized form and formulated in phosphate buffered saline (pH7.4) containing 0.01% sarcosyl, 5% trehaloseprior to lyophilization. |
| Target Uniprot Id |
P01903 |
| Recommended Name |
HLA class II histocompatibility antigen, DR alpha chain |
| Gene Name |
HLA-DRA |
| Synonyms |
Major histocompatibility complex, class II, DR alpha, HLA-DA |
| Species |
Human |
| Predicted Molecular Mass |
24.3 kDa |
| Expression System |
E.coli |
| Expression Range |
27-216aa |
| Tag |
N-6His |
| Purity |
>95% |
| Formulation |
Lyophilized |
| Buffer |
Phosphate buffered saline (pH7.4) containing 0.01% sarcosyl, 5%Trehalose |
| Storage Condition |
1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C. |
| Reconstitution Instruction |
Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%. |
| Applications |
Positive Control; Immunogen; SDS-PAGE; WB |
| Research Area |
Immunology |
| Target Function |
An alpha chain of antigen-presenting major histocompatibility complex class II (MHCII) molecule. In complex with the beta chain HLA-DRB, displays antigenic peptides on professional antigen presenting cells (APCs) for recognition by alpha-beta T cell receptor (TCR) on HLA-DR-restricted CD4-positive T cells. This guides antigen-specific T-helper effector functions, both antibody-mediated immune response and macrophage activation, to ultimately eliminate the infectious agents and transformed cells. Typically presents extracellular peptide antigens of 10 to 30 amino acids that arise from proteolysis of endocytosed antigens in lysosomes. In the tumor microenvironment, presents antigenic peptides that are primarily generated in tumor-resident APCs likely via phagocytosis of apoptotic tumor cells or macropinocytosis of secreted tumor proteins. Presents peptides derived from intracellular proteins that are trapped in autolysosomes after macroautophagy, a mechanism especially relevant for T cell selection in the thymus and central immune tolerance. The selection of the immunodominant epitopes follows two processing modes: 'bind first, cut/trim later' for pathogen-derived antigenic peptides and 'cut first, bind later' for autoantigens/self-peptides. The anchor residue at position 1 of the peptide N-terminus, usually a large hydrophobic residue, is essential for high affinity interaction with MHCII molecules. |
| Subcellular Location |
Cell membrane; Single-pass type I membrane protein. Endoplasmic reticulum membrane; Single-pass type I membrane protein. Early endosome membrane; Single-pass type I membrane protein. Late endosome membrane; Single-pass type I membrane protein. Lysosome membrane; Single-pass type I membrane protein. Autolysosome membrane; Single-pass type I membrane protein. |
| Protein Family |
MHC class II family |
| Tissue Specificity |
Expressed in professional APCs: macrophages, dendritic cells and B cells (at protein level). Expressed in thymic epithelial cells (at protein level). |
