Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 35.86 kDa 
• Atom Count: 2349 
• Residue Count: 270 
• Unique protein chains: 1

3S98

human IFNAR1

• DOI: 10.2210/pdb3S98/pdb

• Classification: SIGNALING PROTEIN RECEPTOR
• Organism(s): Homo sapiens
• Expression System: Trichoplusia ni
• Mutation(s): No 


• Deposited: 2011-06-01 Released: 2011-08-31 
• Deposition Author(s): Thomas, C., Garcia, K.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.234 
• R-Value Work: 0.210 

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

• PubMed: 21854986 
• DOI: 10.1016/j.cell.2011.06.048
• Primary Citation of Related Structures:  
  3S8W, 3S98, 3S9D, 3SE3, 3SE4


• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Interferon alpha/beta receptor 1	A	306	Homo sapiens	Mutation(s): 0  Gene Names: IFNAR1, IFNAR
Find proteins for P17181 (Homo sapiens) Explore P17181  Go to UniProtKB:  P17181
NIH Common Fund Data Resources
PHAROS:  P17181 GTEx:  ENSG00000142166

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	A	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.234 
• R-Value Work: 0.210 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.09	α = 90
b = 86.18	β = 90
c = 91.34	γ = 90

Software Package:

Software Name	Purpose
Blu-Ice	data collection
autoSHARP	phasing
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-06-01 
• Released Date: 2011-08-31 
Deposition Author(s): Thomas, C., Garcia, K.C.

Revision History 

• Version 1.0: 2011-08-31
  Type: Initial release
  
• Version 1.1: 2012-03-21
  Changes: Database references
• Version 1.2: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Database references, Derived calculations, Structure summary