Recombinant Rat sTNF RII/TNFRSF1B Fc Chimera Protein, CF

Name: Recombinant Rat sTNF RII/TNFRSF1B Fc Chimera Protein, CF
Brand: R&D Systems
SKU: 8348-R2
Price: 491 USD
Availability: InStock

R&D Systems | Catalog # 8348-R2

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Product Documents

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Product Specifications
Preparation & Storage
Calculators
Background
Product Documents
Specific Notices
Research Areas

Key Product Details

R&D Systems NS0-derived Recombinant Rat sTNF RII/TNFRSF1B Fc Chimera Protein (8348-R2)
Quality control testing to verify active proteins with lot specific assays by in-house scientists
All R&D Systems proteins are covered with a 100% guarantee

Source

NS0

Accession Number

Q80WY6

Structure / Form

Disulfide-Linked Homodimer

Applications

Bioactivity

View all TNF RII/TNFRSF1B Proteins and Enzymes »

Product Specifications

Source

Mouse myeloma cell line, NS0-derived rat TNF RII/TNFRSF1B protein

Rat TNF RII/TNFRSF1B (Val23-Gly258) Accession # Q80WY6	IEGRMDP	Mouse IgG₂ (Glu98-Lys330)
N-terminus		C-terminus

Purity

>95%, by SDS-PAGE with silver staining.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis

Val23

Predicted Molecular Mass

52 kDa

SDS-PAGE

62-85 kDa, reducing conditions

Activity

Measured by its ability to inhibit the TNF-alpha mediated cytotoxicity in the L‑929 mouse fibroblast cells in the presence of the metabolic inhibitor actinomycin D. Matthews, N. and M.L. Neale (1987) in Lymphokines and Interferons, A Practical Approach. Clemens, M.J. et al. (eds): IRL Press. 221.
The ED₅₀ for this effect is 0.4-2.4 ng/mL in the presence of 0.1 ng/mL of Recombinant Rat TNF‑ alpha (Catalog # 510-RT).

Formulation, Preparation, and Storage

8348-R2

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution	Reconstitute at 500 μg/mL in sterile PBS. Loading...
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & 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.

Calculators

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

Volume (to add to vial)

Mass (in vial)

Desired Reconstitution Concentration

Background: TNF RII/TNFRSF1B

Tumor Necrosis Factor Receptor II (TNF RII), also known as TNFRSF1B, p75/p80, and CD120b, is a type I transmembrane protein that belongs to the TNF receptor superfamily. It has a molecular weight of approximately 75 kDa (1-4). The TNF receptor superfamily is comprised of structurally related receptors that bind to TNF-related ligands and regulate numerous processes such as immune cell activation and apoptosis. Receptors in this superfamily are characterized by the presence of a cysteine-rich region in their extracellular domain (ECD) (1-3, 5). Rat TNF RII contains four cysteine-rich repeats in its ECD, which shares 56% and 84% amino acid sequence identity with the human and mouse orthologs, respectively. Several receptors in the TNF superfamily also contain intracellular death domains (DDs) that recruit caspase-interacting proteins to initiate apoptosis upon ligand binding. Those receptors that lack DDs, like TNF RII, bind TNF Receptor‑associated Factors, which transduce signals generated by activation of these receptors (6, 7).

TNF RII is expressed predominantly on cells of the hematopoietic lineage, such as T and natural killer cells, as well as on endothelial cells, microglia, astrocytes, neurons, oligodendrocytes, cardiac myocytes, and thymocytes (6, 8, 9). In humans, TNF RII is also located on mesenchymal stem cells (6, 9, 10). TNF RII binds to the membrane-bound forms of TNF-alpha and Lymphotoxin-alpha /TNF-beta ; soluble TNF is thought to signal predominately through TNF RI (7, 11). TNF RII activation primarily initiates pro-inflammatory and pro-survival responses via NF kappa B-dependent signaling pathways (6, 7, 12-15). However, under certain conditions, TNF RII signaling can induce apoptosis (6). TNF RII also exists as a soluble receptor, which can be generated by proteolytic cleavage of its ECD from the cell surface or by alternative splicing (2 16). Soluble TNF RII is believed to inhibit TNF biological activity by binding TNF thereby preventing it from activating membrane TNF receptors (17). Polymorphisms of the human TNFR2 gene, which result in increased expression of both membrane-bound and soluble TNF RII, have been associated with several autoimmune diseases including Crohn’s disease, systemic lupus erythematosus, and familial rheumatoid arthritis (6, 17).