Macromolecule Content

• Total Structure Weight: 24.32 kDa 
• Atom Count: 1710 
• Modelled Residue Count: 212 
• Deposited Residue Count: 212 
• Unique protein chains: 1

1N6U

NMR structure of the interferon-binding ectodomain of the human interferon receptor

• DOI: 10.2210/pdb1N6U/pdb
• BMRB: 5049

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-11-12 Released: 2003-07-15 
• Deposition Author(s): Chill, J.H., Quadt, S.R., Levy, R., Schreiber, G., Anglister, J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 35 
• Conformers Submitted: 22 
• Selection Criteria: structures with the lowest energy 

Literature

The human type I interferon receptor. NMR structure reveals the molecular basis of ligand binding.

Chill, J.H., Quadt, S.R., Levy, R., Schreiber, G., Anglister, J.

(2003) Structure 11: 791-802

• PubMed: 12842042 
• DOI: 10.1016/s0969-2126(03)00120-5
• Primary Citation of Related Structures:  
  1N6V, 1N6U


• PubMed Abstract: 
  

The potent antiviral and antiproliferative activities of human type I interferons (IFNs) are mediated by a single receptor comprising two subunits, IFNAR1 and IFNAR2. The structure of the IFNAR2 IFN binding ectodomain (IFNAR2-EC), the first helical cytokine receptor structure determined in solution, reveals the molecular basis for IFN binding. The atypical perpendicular orientation of its two fibronectin domains explains the lack of C domain involvement in ligand binding. A model of the IFNAR2-EC/IFNalpha2 complex based on double mutant cycle-derived constraints uncovers an extensive and predominantly aliphatic hydrophobic patch on the receptor that interacts with a matching hydrophobic surface of IFNalpha2. An adjacent motif of alternating charged side chains guides the two proteins into a tight complex. The binding interface may account for crossreactivity and ligand specificity of the receptor. This molecular description of IFN binding should be invaluable for study and design of IFN-based biomedical agents.

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Related Citations: 

• The human interferon receptor: NMR-based modeling, mapping of the IFN-alpha2 binding site, and observed ligand-induced tightening
  Chill, J.H., Nivasch, R., Levy, R., Albeck, S., Schreiber, G., Anglister, J.
  (2002) Biochemistry 41: 3575

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Organizational Affiliation: 

Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Interferon-alpha/beta receptor beta chain	A	212	Homo sapiens	Mutation(s): 0  Gene Names: IFNAR2 OR IFNARB, IFNAR2, IFNABR, IFNARB
Find proteins for P48551 (Homo sapiens) Explore P48551  Go to UniProtKB:  P48551
NIH Common Fund Data Resources
PHAROS:  P48551 GTEx:  ENSG00000159110

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 35 
• Conformers Submitted: 22 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1N6U Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-11-12 
• Released Date: 2003-07-15 
Deposition Author(s): Chill, J.H., Quadt, S.R., Levy, R., Schreiber, G., Anglister, J.

Revision History  

• Version 1.0: 2003-07-15
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance