Active Recombinant Human TNFRSF18 protein, Fc/Avi-tagged, Biotinylated

• Cat.No.: TNFRSF18-051H
• Product Overview: Biotinylated Recombinant Human TNFRSF18(Gln26-Glu161) protein, fused to Fc/Avi tag at the C-terminus, was expressed in CHO cells .

Specification

• Description: GITR (glucocorticoid-induced tumor necrosis factor receptor), also known as AITR and TNFRSF18, is a 40 kDa transmembrane glycoprotein that functions in immune regulation (1, 2). Mature human GITR consists of a 137 amino acid (aa) extracellular domain (ECD) with three tandem TNFR cysteine-rich repeats, a 21 aa transmembrane segment, and a 58 aa cytoplasmic domain (3, 4). Within the ECD, human GITR shares 55% and 60% aa sequence identity with mouse and rat GITR, respectively. Alternative splicing generates an isoform with a short deletion in the cytoplasmic domain and a potentially secreted isoform that is substituted within the third TNFR repeat and lacks the transmembrane and cytoplasmic regions. GITR is expressed on CD4+CD25+ regulatory T cells (Treg) as well as on subsets of thymocytes, lymph node cells, and splenocytes (4-6), and it is upregulated on antigen-activated conventional CD4+ and CD8+ T cells (3, 4, 6, 7). GITR binding by GITR Ligand/TNFSF18 costimulates the proliferation and activation of CD4+ or CD8+ conventional T cells (3, 7-9). It also induces the proliferation of Treg (8, 10) but inhibits the ability of Treg to suppress immune responses (5, 8, 11-13). This can result in the development of autoimmunity, increased tumor cell killing by effector T cells (5, 11), and increased inflammation in arthritis, allergic asthma, and inflammatory bowel disease (10, 14). GITR is also expressed on sympathetic neurons where it enhances NGF-induced neurite outgrowth and branching (15).
• Source: CHO cells
• Species: Human
• Tag: Fc&Avi
• Predicted N Terminal: Gln26 inferred from enzymatic pyroglutamate treatment revealing Arg27
• Form: Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
• Bio-activity: Measured by its binding ability in a functional ELISA. When Recombinant Human TNFSF18 is immobilized at 0.5 μg/mL (100 μL/well), It binds to Biotinylated Recombinant Human TNFRSF18 Fc Chimera Avi-tag with an ED50 of 0.05-0.5 μg/mL.
• Molecular Mass: 54-60 kDa, under reducing conditions
• Protein length: Gln26-Glu161
• Endotoxin: <0.10 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.
• Applications: Bioactivity
• Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.12 months from date of receipt, -20 to -70 °C as supplied.1 month, 2 to 8 °C under sterile conditions after reconstitution.3 months, -20 to -70 °C under sterile conditions after reconstitution.
• Reconstitution: Reconstitute at 500 μg/mL in PBS.

Gene Information

• Gene Name: TNFRSF18 tumor necrosis factor receptor superfamily, member 18 [ Homo sapiens ]
• Official Symbol: TNFRSF18
• Synonyms: TNFRSF18; tumor necrosis factor receptor superfamily, member 18; tumor necrosis factor receptor superfamily member 18; AITR; CD357; GITR; activation-inducible TNFR family receptor; glucocorticoid-induced TNFR-related protein; TNF receptor superfamily activation-inducible protein; GITR-D
• Gene ID: 8784
• mRNA Refseq: NM_004195
• Protein Refseq: NP_004186
• MIM: 603905
• UniProt ID: Q9Y5U5