2ZPX

TNF Receptor Subtype One-selective TNF Mutant with Antagonistic Activity; R1antTNF-T8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.83 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.268 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

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

Mukai, Y.Nakamura, T.Yoshioka, Y.Shibata, H.Abe, Y.Nomura, T.Taniai, M.Ohta, T.Nakagawa, S.Tsunoda, S.Kamada, H.Yamagata, Y.Tsutsumi, Y.

(2009) J.Biochem. 146: 167-172

  • DOI: 10.1093/jb/mvp065

  • PubMed Abstract: 
  • 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 ...

    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.


    Organizational Affiliation

    Osaka University, Yamadaoka, Suita, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tumor necrosis factor
A, B, C
157Homo sapiensMutation(s): 12 
Gene Names: TNF (TNFA, TNFSF2)
Find proteins for P01375 (Homo sapiens)
Go to Gene View: TNF
Go to UniProtKB:  P01375
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.83 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.268 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.586α = 90.00
b = 111.331β = 90.00
c = 75.382γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
HKL-2000data collection
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-03-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance