Recombinant Canine TNF RI/TNFRSF1A Protein, CF Summary
Details of Functionality |
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 0.04-0.2 µg/mL in the presence of 15 ng/mL of rcaTNF-alpha . |
Source |
E. coli-derived canine TNF RI/TNFRSF1A protein Ile22-Thr211, with an N-terminal Met |
Accession # |
|
N-terminal Sequence |
Met |
Protein/Peptide Type |
Recombinant Proteins |
Purity |
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain |
Endotoxin Note |
<0.01 EU per 1 μg of the protein by the LAL method. |
Applications/Dilutions
Dilutions |
|
Theoretical MW |
21.6 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors. |
Packaging, Storage & Formulations
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.
|
Buffer |
Lyophilized from a 0.2 μm filtered solution in PBS. |
Purity |
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain |
Reconstitution Instructions |
Reconstitute at 100 μg/mL in sterile PBS. |
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Canine TNF RI/TNFRSF1A Protein, CF
Background
TNF receptor 1 (TNF RI; also called TNF R-p55/p60, TNFRSF1A and CD120a) is a type I transmembrane protein that belongs to the TNF receptor superfamily (1, 2). TNF RI is widely expressed and is present on the cell surface as a trimer of 55 kDa subunits. It serves as a receptor for both TNF-alpha and TNF-beta /lymphotoxin. Each subunit contains four TNF-alpha trimer-binding cysteine-rich domains (CRD) in its extracellular domain (ECD) (1 - 6). TNF-alpha binding to TNF R1 induces the sequestration of TNF RI in lipid rafts, where it activates NF kappa B and is cleaved by ADAM-17/TACE (7, 8). Release of the 28 - 34 kDa TNF RI ECD occurs constitutively, and in response to products of pathogens such as LPS, CpG DNA or
S. aureus protein A (1, 7 - 12). Full-length TNF RI may also be released in exosome-like vesicles (12). This release helps to resolve inflammatory reactions as it down-regulates cell surface TNF RI and provides soluble TNF RI to bind TNF-alpha (6, 13, 14). Exclusion from lipid rafts causes endocytosis of TNF RI complexes and induces apoptosis (7, 15). Although there is a second receptor for TNF-alpha (TNF R2), TNF RI is thought to mediate most of the cellular effects of TNF-alpha (3). TNF R1 is essential for proper development of lymph node germinal centers and Peyer’s patches, and for combating intracellular pathogens such as Listeria monocytogenes (1 - 3). Canine TNF RI is a 452 amino acid (aa) protein (16). Based on human, its ECD will contain a PLAD domain that mediates constitutive trimer formation (6). The PLAD domain will be followed by four CRDs, a transmembrane domain, and a cytoplasmic sequence that contains a neutral sphingomyelinase activation domain and a death domain. The ECD of canine TNF RI shows approximately 87%, 75%, 80%, 66% and 67% aa identity with feline, porcine, human, rat and mouse TNF RI, respectively.
- Pfeffer, K. (2003) Cytokine Growth Factor Rev. 14:185.
- Hehlgans, T. and K. Pfeffer (2005) Immunology 115:1.
- Peschon, J.J. et al. (1998) J. Immunol. 160:943.
- Banner, D.W et al. (1993) Cell 73: 431.
- Medvedev, A.E. et al. (1996) J. Biol. Chem. 271:9778.
- Chan, F.K. et al. (2000) Science 288:2351.
- Legler, D.F. et al. (2003) Immunity 18:655.
- Tellier, E. et al. (2006) Exp. Cell Res. 312:3969.
- Xanthoulea, S. et al. (2004) J. Exp. Med. 200:367.
- Jin, L. et al. (2000) J. Immunol. 165:5153.
- Gomez, M.I. et al. (2006) J. Biol. Chem. 281:20190.
- Islam, A. et al. (2006) J. Biol. Chem. 281:6860.
- Garton, K.J. et al. (2006) J. Leukoc. Biol. 79:1105.
- McDermott, M.F. et al. (1999) Cell 97:133.
- Schneider-Brachert, W. et al. (2004) Immunity 21:415.
- GenBank Accession # XP_854474.
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