2HYM

NMR based Docking Model of the Complex between the Human Type I Interferon Receptor and Human Interferon alpha-2


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: LOWEST ENERGY STRUCTURES OF LOWEST ENERGY CLUSTER 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Determination of the human type I interferon receptor binding site on human interferon-alpha2 by cross saturation and an NMR-based model of the complex

Quadt-Akabayov, S.R.Chill, J.H.Levy, R.Kessler, N.Anglister, J.

(2006) Protein Sci. 15: 2656-2668

  • DOI: 10.1110/ps.062283006

  • PubMed Abstract: 
  • Type I interferons (IFNs) are a family of homologous helical cytokines that exhibit pleiotropic effects on a wide variety of cell types, including antiviral activity and antibacterial, antiprozoal, immunomodulatory, and cell growth regulatory functio ...

    Type I interferons (IFNs) are a family of homologous helical cytokines that exhibit pleiotropic effects on a wide variety of cell types, including antiviral activity and antibacterial, antiprozoal, immunomodulatory, and cell growth regulatory functions. Consequently, IFNs are the human proteins most widely used in the treatment of several kinds of cancer, hepatitis C, and multiple sclerosis. All type I IFNs bind to a cell surface receptor consisting of two subunits, IFNAR1 and IFNAR2, associating upon binding of interferon. The structure of the extracellular domain of IFNAR2 (R2-EC) was solved recently. Here we study the complex and the binding interface of IFNalpha2 with R2-EC using multidimensional NMR techniques. NMR shows that IFNalpha2 does not undergo significant structural changes upon binding to its receptor, suggesting a lock-and-key mechanism for binding. Cross saturation experiments were used to determine the receptor binding site upon IFNalpha2. The NMR data and previously published mutagenesis data were used to derive a docking model of the complex with an RMSD of 1 Angstrom, and its well-defined orientation between IFNalpha2 and R2-EC and the structural quality greatly improve upon previously suggested models. The relative ligand-receptor orientation is believed to be important for interferon signaling and possibly one of the parameters that distinguish the different IFN I subtypes. This structural information provides important insight into interferon signaling processes and may allow improvement in the development of therapeutically used IFNs and IFN-like molecules.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Soluble IFN alpha/beta receptor
A
212Homo sapiensMutation(s): 0 
Gene Names: IFNAR2 (IFNABR, IFNARB)
Find proteins for P48551 (Homo sapiens)
Go to Gene View: IFNAR2
Go to UniProtKB:  P48551
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Interferon alpha-2
B
165Homo sapiensMutation(s): 0 
Gene Names: IFNA2 (IFNA2A, IFNA2B, IFNA2C)
Find proteins for P01563 (Homo sapiens)
Go to Gene View: IFNA2
Go to UniProtKB:  P01563
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: LOWEST ENERGY STRUCTURES OF LOWEST ENERGY CLUSTER 
  • Olderado: 2HYM Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-10-10
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance