4YPG

Structural Insights Into the Neutralization Properties of a Human Anti-Interferon Monoclonal Antibody


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Structural Insights into the Neutralization Properties of the Fully Human, Anti-interferon Monoclonal Antibody Sifalimumab.

Oganesyan, V.Peng, L.Woods, R.M.Wu, H.Dall'Acqua, W.F.

(2015) J.Biol.Chem. 290: 14979-14985

  • DOI: 10.1074/jbc.M115.652156

  • PubMed Abstract: 
  • We report the three-dimensional structure of human interferon α-2A (IFN-α2A) bound to the Fab fragment of a therapeutic monoclonal antibody (sifalimumab; IgG1/κ). The structure of the corresponding complex was solved at a resolution of 3.0 Å using mo ...

    We report the three-dimensional structure of human interferon α-2A (IFN-α2A) bound to the Fab fragment of a therapeutic monoclonal antibody (sifalimumab; IgG1/κ). The structure of the corresponding complex was solved at a resolution of 3.0 Å using molecular replacement and constitutes the first reported structure of a human type I IFN bound to a therapeutic antibody. This study revealed the major contribution made by the first complementarity-determining region in each of sifalimumab light and heavy chains. These data also provided the molecular basis for sifalimumab mechanism of action. We propose that its interferon-neutralizing properties are the result of direct competition for IFN-α2A binding to the IFN receptor subunit 1 (IFNAR1) and do not involve inhibiting IFN-α2A binding to the IFN receptor subunit 2 (IFNAR2).


    Organizational Affiliation

    From the Department of Antibody Discovery and Protein Engineering, MedImmune LLC, Gaithersburg, Maryland 20878 oganesyanv@medimmune.com.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sifalimumab light chain
A, L
215N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Sifalimumab heavy chain
B, H
219N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Interferon alpha-2
C, D
161Homo sapiensMutation(s): 0 
Gene Names: IFNA2 (IFNA2A, IFNA2B, IFNA2C)
Find proteins for P01563 (Homo sapiens)
Go to Gene View: IFNA2
Go to UniProtKB:  P01563
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NI
Query on NI

Download SDF File 
Download CCD File 
A, B, C, D, H, L
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.206 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 134.820α = 90.00
b = 153.260β = 90.00
c = 163.490γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-05-06
    Type: Initial release
  • Version 1.1: 2015-05-13
    Type: Database references
  • Version 1.2: 2015-06-24
    Type: Database references
  • Version 2.0: 2019-02-13
    Type: Advisory, Atomic model, Data collection, Database references, Derived calculations, Source and taxonomy, Structure summary