|Product Overview:||Recombinant Human TNFRSF9(Leu24-His183) fused with His tag at C-terminal was expressed in CHO.|
|Description:||4-1BB, also known as CD137 and TNFRSF9, is an approximately 30 kDa transmembrane glycoprotein in the TNF receptor superfamily. 4-1BB functions in the development and activation of multiple immune cells. Mature human 4-1BB consists of a 163 amino acid (aa) extracellular domain (ECD) with four TNFR cysteine-rich repeats, a 27 aa transmembrane segment, and a 42 aa cytoplasmic domain. Within the ECD, human 4-1BB shares 60% aa sequence identity with mouse and rat 4-1BB. 4-1BB is expressed as a disulfide-linked homodimer on various populations of activated T cell including CD4+, CD8+, memory CD8+, NKT, and regulatory T cells as well as on myeloid and mast cell progenitors, dendritic cells, mast cells, and bacterially infected osteoblasts. It binds with high affinity to the transmembrane 4-1BB Ligand/TNFSF9 which is expressed on antigen presenting cells and myeloid progenitor cells. This interaction costimulates the proliferation, activation, and/or survival of the 4-1BB expressing cell. It can also enhance the activation-induced cell death of repetitively stimulated T cells. Mice lacking 4-1BB show augmented T cell activation, perhaps due to its absence on regulatory T cells. 4-1BB can associate with OX40 on activated T cells, forming a complex that responds to either ligand and inhibits Treg and CD8+ T cell proliferation. Reverse signaling through 4-1BB Ligand inhibits the development of dendritic cells, B cells, and osteoclasts but supports mature dendritic cell survival and costimulates the proliferation and activation of mast cells.
4-1BB activation enhances CD8+ T cell and NK cell mediated anti-tumor immunity. It also contributes to the development of inflammation in high fat diet-induced metabolic syndrome. Soluble forms of 4-1BB and 4-1BB Ligand circulate at elevated levels in the serum of rheumatoid arthritis and hematologic cancer patients, respectively.
|Predicted N Terminal:||Leu24|
|Form:||yophilized from a 0.2 μm filtered solution in PBS.|
|Bio-activity:||Measured by its binding ability in a functional ELISA. When Recombinant Human 4-1BB/TNFRSF9/CD137 is immobilized at 50 ng/mL, 100 μL/well, the concentration of Recombinant Human 4‑1BB Ligand/TNFSF9 that produces 50% of the optimal binding response is approximately 2.5-12.5 ng/mL.|
|Molecular Mass:||Predicted Molecular Mass: 18 kDa
SDS-PAGE: 25-38 kDa, reducing conditions
|Endotoxin:||<0.1 EU per 1 μg of the protein by the LAL method.|
|Purity:||>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.|
|Storage:||Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 centigrade as supplied.
1 month, 2 to 8 centigrade under sterile conditions after reconstitution.
3 months, -20 to -70 centigrade under sterile conditions after reconstitution.
|Reconstitution:||Reconstitute at 500 μg/mL in PBS.|
|Gene Name:||TNFRSF9 tumor necrosis factor receptor superfamily, member 9 [ Homo sapiens ]|
|Synonyms:||TNFRSF9; tumor necrosis factor receptor superfamily, member 9; ILA; tumor necrosis factor receptor superfamily member 9; 4 1BB; CD137; CD137 antigen; T cell antigen ILA; T-cell antigen ILA; 4-1BB ligand receptor; homolog of mouse 4-1BB; receptor protein 4-1BB; T-cell antigen 4-1BB homolog; induced by lymphocyte activation (ILA); interleukin-activated receptor, homolog of mouse Ly63; 4-1BB; CDw137; MGC2172; FLJ43501;|
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