2zpx Citations

Fast binding kinetics and conserved 3D structure underlie the antagonistic activity of mutant TNF: useful information for designing artificial proteo-antagonists.


Tumour necrosis factor (TNF) is an important cytokine that induces an inflammatory response predominantly through the TNF receptor-1 (TNFR1). A crucial strategy for the treatment of many autoimmune diseases, therefore, is to block the binding of TNF to TNFR1. We previously identified a TNFR1-selective antagonistic mutant TNF (R1antTNF) from a phage library containing six randomized amino acid residues at the receptor-binding site (amino acids 84-89). Two R1antTNFs, R1antTNF-T2 (A84S, V85T, S86T, Y87H, Q88N and T89Q) and R1antTNF-T8 (A84T, V85P, S86A, Y87I, Q88N and T89R), were successfully isolated from this library. Here, we analysed R1antTNF-T8 using surface plasmon resonance spectroscopy and X-ray crystallography to determine the mechanism underlying the antagonistic activity of R1antTNF. The kinetic association/dissociation parameters of R1antTNF-T8 were higher than those of wild-type TNF, indicating more rapid bond dissociation. X-ray crystallographic analysis suggested that the binding mode of the T89R mutation changed from a hydrophobic to an electrostatic interaction, which may be responsible for the antagonistic behaviour of R1antTNF. Knowledge of these structure-function relationships will facilitate the design of novel TNF inhibitors based on the cytokine structure.

Reviews citing this publication (1)

  1. Biologics: the next-generation therapeutics for analgesia? Hatcher JP, Chessell IP, Hughes JP. Expert Rev Neurother 11 1653-1658 (2011)

Articles citing this publication (4)

  1. Congresses The TNF superfamily in 2009: new pathways, new indications, and new drugs. Tansey MG, Szymkowski DE. Drug Discov. Today 14 1082-1088 (2009)
  2. Interleukin-1β and tumor necrosis factor-α: reliable targets for protective therapies in Parkinson's Disease? Leal MC, Casabona JC, Puntel M, Pitossi FJ. Front Cell Neurosci 7 53 (2013)
  3. Unraveling the binding mechanism of trivalent tumor necrosis factor ligands and their receptors. Reis CR, van Assen AH, Quax WJ, Cool RH. Mol. Cell Proteomics 10 M110.002808 (2011)
  4. Structural pathways of cytokines may illuminate their roles in regulation of cancer development and immunotherapy. Guven-Maiorov E, Acuner-Ozbabacan SE, Keskin O, Gursoy A, Nussinov R. Cancers (Basel) 6 663-683 (2014)