3SE4

human IFNw-IFNAR ternary complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5001 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural linkage between ligand discrimination and receptor activation by type I interferons.

Thomas, C.Moraga, I.Levin, D.Krutzik, P.O.Podoplelova, Y.Trejo, A.Lee, C.Yarden, G.Vleck, S.E.Glenn, J.S.Nolan, G.P.Piehler, J.Schreiber, G.Garcia, K.C.

(2011) Cell 146: 621-632

  • DOI: 10.1016/j.cell.2011.06.048
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Type I Interferons (IFNs) are important cytokines for innate immunity against viruses and cancer. Sixteen human type I IFN variants signal through the same cell-surface receptors, IFNAR1 and IFNAR2, yet they can evoke markedly different physiological ...

    Type I Interferons (IFNs) are important cytokines for innate immunity against viruses and cancer. Sixteen human type I IFN variants signal through the same cell-surface receptors, IFNAR1 and IFNAR2, yet they can evoke markedly different physiological effects. The crystal structures of two human type I IFN ternary signaling complexes containing IFNα2 and IFNω reveal recognition modes and heterotrimeric architectures that are unique among the cytokine receptor superfamily but conserved between different type I IFNs. Receptor-ligand cross-reactivity is enabled by conserved receptor-ligand "anchor points" interspersed among ligand-specific interactions that "tune" the relative IFN-binding affinities, in an apparent extracellular "ligand proofreading" mechanism that modulates biological activity. Functional differences between IFNs are linked to their respective receptor recognition chemistries, in concert with a ligand-induced conformational change in IFNAR1, that collectively control signal initiation and complex stability, ultimately regulating differential STAT phosphorylation profiles, receptor internalization rates, and downstream gene expression patterns.


    Organizational Affiliation

    Howard Hughes Medical Institute, Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interferon alpha/beta receptor 1
A
414Homo sapiensMutation(s): 0 
Gene Names: IFNAR1 (IFNAR)
Find proteins for P17181 (Homo sapiens)
Go to Gene View: IFNAR1
Go to UniProtKB:  P17181
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Interferon omega-1
B
177Homo sapiensMutation(s): 1 
Gene Names: IFNW1
Find proteins for P05000 (Homo sapiens)
Go to Gene View: IFNW1
Go to UniProtKB:  P05000
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Interferon alpha/beta receptor 2
C
199Homo sapiensMutation(s): 0 
Gene Names: IFNAR2 (IFNABR, IFNARB)
Find proteins for P48551 (Homo sapiens)
Go to Gene View: IFNAR2
Go to UniProtKB:  P48551
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5001 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.213 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 93.490α = 90.00
b = 93.490β = 90.00
c = 403.130γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
Blu-Icedata collection
XSCALEdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-31
    Type: Initial release
  • Version 1.1: 2012-03-21
    Type: Database references