3PIW

Zebrafish interferon 2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.141 
  • R-Value Observed: 0.144 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of Zebrafish Interferons I and II Reveals Conservation of Type I Interferon Structure in Vertebrates.

Hamming, O.J.Lutfalla, G.Levraud, J.P.Hartmann, R.

(2011) J Virol 85: 8181-8187

  • DOI: https://doi.org/10.1128/JVI.00521-11
  • Primary Citation of Related Structures:  
    3PIV, 3PIW

  • PubMed Abstract: 

    Interferons (IFNs) play a major role in orchestrating the innate immune response toward viruses in vertebrates, and their defining characteristic is their ability to induce an antiviral state in responsive cells. Interferons have been reported in a multitude of species, from bony fish to mammals. However, our current knowledge about the molecular function of fish IFNs as well as their evolutionary relationship to tetrapod IFNs is limited. Here we establish the three-dimensional (3D) structure of zebrafish IFNϕ1 and IFNϕ2 by crystallography. These high-resolution structures offer the first structural insight into fish cytokines. Tetrapods possess two types of IFNs that play an immediate antiviral role: type I IFNs (e.g., alpha interferon [IFN-α] and beta interferon [IFN-β]) and type III IFNs (lambda interferon [IFN-λ]), and each type is characterized by its specific receptor usage. Similarly, two groups of antiviral IFNs with distinct receptors exist in fish, including zebrafish. IFNϕ1 and IFNϕ2 represent group I and group II IFNs, respectively. Nevertheless, both structures reported here reveal a characteristic type I IFN architecture with a straight F helix, as opposed to the remaining class II cytokines, including IFN-λ, where helix F contains a characteristic bend. Phylogenetic trees derived from structure-guided multiple alignments confirmed that both groups of fish IFNs are evolutionarily closer to type I than to type III tetrapod IFNs. Thus, these fish IFNs belong to the type I IFN family. Our results also imply that a dual antiviral IFN system has arisen twice during vertebrate evolution.


  • Organizational Affiliation

    Centre for Structural Biology, Department of Molecular Biology, Aarhus University, Aarhus, Denmark.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Type I interferon 2161Danio rerioMutation(s): 4 
Gene Names: ifnphi2ifn2
UniProt
Find proteins for A8E6E2 (Danio rerio)
Explore A8E6E2 
Go to UniProtKB:  A8E6E2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA8E6E2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.141 
  • R-Value Observed: 0.144 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.215α = 90
b = 84.215β = 90
c = 45.209γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-07-20
    Type: Initial release
  • Version 1.1: 2011-08-03
    Changes: Database references
  • Version 1.2: 2018-03-07
    Changes: Data collection