Recombinant Human sTNF RI/TNFRSF1A Protein


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Recombinant Human sTNF RI/TNFRSF1A Protein 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, in the presence of 0.25 ng/mL of recombinant human TNF-alpha, is 0.045‑0.09 µg/mL.
E. coli-derived human TNF RI/TNFRSF1A protein
Ile22-Thr211, with an N-terminal Met
Accession #
N-terminal Sequence
Protein/Peptide Type
Recombinant Proteins
>97%, 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.


Theoretical MW
21 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.
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636-R1 in the following applications:

Packaging, Storage & Formulations

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.
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain.
Reconstitution Instructions
Reconstitute at 100 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.


This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human sTNF RI/TNFRSF1A Protein

  • CD120a antigen
  • CD120a
  • FPF
  • p55
  • p55-R
  • p60
  • TNF RI
  • TNFARMGC19588
  • TNF-R
  • TNF-R1
  • TNFR55
  • TNF-R55
  • TNFR60
  • TNF-RI
  • TNF-R-I
  • TNFR-I
  • tumor necrosis factor binding protein 1
  • Tumor necrosis factor receptor 1
  • tumor necrosis factor receptor 1A isoform beta
  • tumor necrosis factor receptor superfamily member 1A
  • tumor necrosis factor receptor superfamily, member 1A
  • tumor necrosis factor receptor type 1
  • Tumor necrosis factor receptor type I
  • tumor necrosis factor-alpha receptor


TNF receptor 1 (TNF RI; also called TNF R-p55/p60 and TNFRSF1A) is a 55 kDa type I transmembrane protein member of the TNF receptor superfamily, designated TNFRSF1A (1, 2). Human TNF RI is a 455 amino acid (aa) protein that contains a 21 aa signal sequence and 190 aa ECD with a PLAD (pre-ligand assembly domain) that mediates constitutive dimer/trimer formation, followed by four CRD (cysteine-rich domains), a 23 aa transmembrane domain, and a 221 aa cytoplasmic sequence that contains a neutral sphingomyelinase activation domain and a death domain (3, 4). The ECD of human TNF RI shows 70%, 69%, 80%, 80%, and 73% aa identity with mouse, rat, canine, feline and porcine TNF RI, respectively; and it shows 23% aa identity with the ECD of TNF RII. Both TNF RI and TNF RII (TNFRSF1B) are widely expressed and contain four TNF-alpha trimer-binding CRD in their ECD. However, TNF RI is thought to mediate most of the cellular effects of TNF-alpha (3). It is essential for proper development of lymph node germinal centers and Peyer's patches, and for combating intracellular pathogens such as Listeria (1, 2, 5). TNF RI is also a receptor for TNF-beta /TNFSF1B (lymphotoxin-alpha ) (6). TNF RI is stored in the Golgi and translocates to the cell surface following pro‑inflammatory stimuli (7). TNF-alpha stabilizes TNF RI and induces its sequestering in lipid rafts, where it activates NF kappa B and is cleaved by ADAM-17/TACE (8, 9, 16). Release of the 28-34 kDa TNF RI ECD also occurs constitutively and in response to products of pathogens such as LPS, CpG DNA or S. aureus protein A (1, 10-12). Full-length TNF RI may also be released in exosome-like vesicles (13). Release helps to resolve inflammatory reactions, since it down-regulates cell surface TNF RI and provides soluble TNF RI to bind TNF-alpha (10, 14, 15). Exclusion from lipid rafts causes endocytosis of TNF RI complexes and induces apoptosis (1). Mutations of human TNF R1 can result in inflammatory episodes known as TRAPS (TNFR-associated periodic syndrome) (7).

  1. Pfeffer, K. (2003) Cytokine Growth Factor Rev. 14:185.
  2. Hehlgans, T. and K. Pfeffer (2005) Immunology 115:1.
  3. Chan, F.K. et al. (2000) Science 288:2351.
  4. Schall, T.J. et al. (1990) Cell 61:361.
  5. Peschon, J.J. et al. (1998) J. Immunol. 160:943.
  6. Banner, D.W et al. (1993) Cell 73: 431.
  7. Turner, M.D. et al. (2012) Biosci. Rep. 32:105.
  8. Legler, D.F. et al. (2003) Immunity 18:655.
  9. Tellier, E. et al. (2006) Exp. Cell Res. 312:3969.
  10. Xanthoulea, S. et al. (2004) J. Exp. Med. 200:367.
  11. Jin, L. et al. (2000) J. Immunol. 165:5153.
  12. Gomez, M.I. et al. (2006) J. Biol. Chem. 281:20190.
  13. Islam, A. et al. (2006) J. Biol. Chem. 281:6860.
  14. Garton, K.J. et al. (2006) J. Leukoc. Biol. 79:1105.
  15. McDermott, M.F. et al. (1999) Cell 97:133.

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Publications for TNF RI/TNFRSF1A (636-R1)(11)

We have publications tested in 2 confirmed species: Human, N/A.

We have publications tested in 3 applications: Bioassay, ELISA (Standard), Surface Plasmon Resonance.

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Showing Publications 1 - 10 of 11. Show All 11 Publications.
Publications using 636-R1 Applications Species
J Konge, F Leteurtre, M Goislard, D Biard, S Morel-Altm, A Vaurijoux, G Gruel, S Chevillard, J Lebeau Breast cancer stem cell-like cells generated during TGF?-induced EMT are radioresistant Oncotarget, 2018;9(34):23519-23531. 2018 [PMID: 29805752] (Bioassay, Human) Bioassay Human
Goodall L, Ovecka M, Rycroft D, Friel S, Sanderson A, Mistry P, Davies M, Stoop A Pharmacokinetic and Pharmacodynamic Characterisation of an Anti-Mouse TNF Receptor 1 Domain Antibody Formatted for In Vivo Half-Life Extension. PLoS ONE, 2015;10(9):e0137065. 2015 [PMID: 26352810] (Surface Plasmon Resonance, N/A) Surface Plasmon Resonance N/A
Sugita S, Kamao H, Iwasaki Y, Okamoto S, Hashiguchi T, Iseki K, Hayashi N, Mandai M, Takahashi M Inhibition of T-cell activation by retinal pigment epithelial cells derived from induced pluripotent stem cells. Invest Ophthalmol Vis Sci, 2015;56(2):1051-62. 2015 [PMID: 25604685] (Bioassay, Human) Bioassay Human
Wong J, Muthuswamy R, Bartlett D, Kalinski P IL-18-based combinatorial adjuvants promote the intranodal production of CCL19 by NK cells and dendritic cells of cancer patients. Oncoimmunology, 2013;2(9):e26245. 2013 [PMID: 24228233] (Bioassay, Human) Bioassay Human
Colucci S, Brunetti G, Mori G, Oranger A, Centonze M, Mori C, Cantatore FP, Tamma R, Rizzi R, Liso V, Zallone A, Grano M Soluble decoy receptor 3 modulates the survival and formation of osteoclasts from multiple myeloma bone disease patients. Leukemia, 2009;23(11):2139-46. 2009 [PMID: 19587706] (Bioassay, Human) Bioassay Human
Ferguson AR, Christensen RN, Gensel JC, Miller BA, Sun F, Beattie EC, Bresnahan JC, Beattie MS Cell death after spinal cord injury is exacerbated by rapid TNF alpha-induced trafficking of GluR2-lacking AMPARs to the plasma membrane. J. Neurosci., 2008;28(44):11391-400. 2008 [PMID: 18971481]
Dulos J, van der Vleuten MA, Kavelaars A, Heijnen CJ, Boots AM CYP7B expression and activity in fibroblast-like synoviocytes from patients with rheumatoid arthritis: regulation by proinflammatory cytokines. Arthritis Rheum., 2005;52(3):770-8. 2005 [PMID: 15751070] (Bioassay, Human) Bioassay Human
Mozaffarian D, Rimm EB, King IB, Lawler RL, McDonald GB, Levy WC trans fatty acids and systemic inflammation in heart failure. Am. J. Clin. Nutr., 2004;80(6):1521-5. 2004 [PMID: 15585763] (ELISA (Standard), N/A) ELISA (Standard) N/A
Copeland S, Siddiqui J, Remick D Direct comparison of traditional ELISAs and membrane protein arrays for detection and quantification of human cytokines. J. Immunol. Methods, 2004;284(1):99-106. 2004 [PMID: 14736420] (ELISA (Standard), N/A) ELISA (Standard) N/A
Jyonouchi H, Sun S, Itokazu N Innate immunity associated with inflammatory responses and cytokine production against common dietary proteins in patients with autism spectrum disorder. Neuropsychobiology, 0;46(2):76-84. 0 [PMID: 12378124] (ELISA (Standard), N/A) ELISA (Standard) N/A
Show All 11 Publications.

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Gene Symbol TNFRSF1A