4R7N

Fab C2E3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.45 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Robust Antibody-Antigen Complexes Prediction Generated by Combining Sequence Analyses, Mutagenesis, In Vitro Evolution, X-ray Crystallography and In Silico Docking.

Loyau, J.Didelot, G.Malinge, P.Ravn, U.Magistrelli, G.Depoisier, J.F.Pontini, G.Poitevin, Y.Kosco-Vilbois, M.Fischer, N.Thore, S.Rousseau, F.

(2015) J.Mol.Biol. 427: 2647-2662

  • DOI: 10.1016/j.jmb.2015.05.016
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Hu 15C1 is a potent anti-human Toll-like receptor 4 (TLR4) neutralizing antibody. To better understand the molecular basis of its biological activity, we used a multidisciplinary approach to generate an accurate model of the Hu 15C1-TLR4 complex. By ...

    Hu 15C1 is a potent anti-human Toll-like receptor 4 (TLR4) neutralizing antibody. To better understand the molecular basis of its biological activity, we used a multidisciplinary approach to generate an accurate model of the Hu 15C1-TLR4 complex. By combining site-directed mutagenesis, in vitro antibody evolution, affinity measurements and X-ray crystallography of Fab fragments, we identified key interactions across the Hu 15C1-TLR4 interface. These contact points were used as restraints to predict the structure of the Fab region of Hu 15C1 bound to TLR4 using computational molecular docking. This model was further evaluated and validated by additional site-directed mutagenesis studies. The predicted structure of the Hu 15C1-TLR4 complex indicates that the antibody antagonizes the receptor dimerization necessary for its activation. This study exemplifies how iterative cycles of antibody engineering can facilitate the discovery of components of antibody-target interactions.


    Organizational Affiliation

    Novimmune SA, Chemin des Aulx 14, 1228 Plan-les-Ouates, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fab C2E3 Heavy chain
A, C, E, G, I, K, M, O, Q, S
225N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fab C2E3 Light chain
B, D, F, H, J, L, N, P, R, T
214N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.45 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.236 
  • Space Group: P 21 2 21
Unit Cell:
Length (Å)Angle (°)
a = 178.100α = 90.00
b = 208.410β = 90.00
c = 214.380γ = 90.00
Software Package:
Software NamePurpose
StructureStudiodata collection
XDSdata reduction
PHASERphasing
PHENIXrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-29
    Type: Initial release
  • Version 1.1: 2015-08-26
    Type: Database references