1MD6

High resolution crystal structure of murine IL-1F5 reveals unique loop conformation for specificity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.204 

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This is version 1.2 of the entry. See complete history


Literature

High-Resolution Structure of Murine Interleukin 1 Homologue IL-1F5 Reveals Unique Loop Conformations for Receptor Binding Specificity.

Dunn, E.F.Gay, N.J.Bristow, A.F.Gearing, D.P.O'Neill, L.A.Pei, X.Y.

(2003) Biochemistry 42: 10938-10944

  • DOI: 10.1021/bi0341197
  • Primary Citation of Related Structures:  
    1MD6

  • PubMed Abstract: 
  • Interleukin-1 (IL-1) F5 is a novel member of the IL-1 family. The IL-1 family are involved in innate immune responses to infection and injury. These cytokines bind to specific receptors and cause activation of NFkappaB and MAP kinase. IL-1F5 has a sequence identity of 44% to IL-1 receptor antagonist (IL-1Ra), a natural antagonist of the IL-1 system ...

    Interleukin-1 (IL-1) F5 is a novel member of the IL-1 family. The IL-1 family are involved in innate immune responses to infection and injury. These cytokines bind to specific receptors and cause activation of NFkappaB and MAP kinase. IL-1F5 has a sequence identity of 44% to IL-1 receptor antagonist (IL-1Ra), a natural antagonist of the IL-1 system. Here we report the crystal structure of IL-1F5 to a resolution of 1.6 A. It has the same beta-trefoil fold as other IL-1 family members, and the hydrophobic core is well conserved. However, there are substantial differences in the loop conformations, structures that confer binding specificity for the cognate receptor to IL-1beta and the antagonist IL-1Ra. Docking and superimposition of the IL-1F5 structure suggest that is unlikely to bind to the interleukin1 receptor, consistent with biochemical studies. The structure IL-1F5 lacks features that confer antagonist properties on IL-1Ra, and we predict that like IL-1beta it will act as an agonist. These studies give insights into how distinct receptor specificities can evolve within related cytokine families.


    Organizational Affiliation

    Department of Biochemistry, Trinity College, Dublin 2, Ireland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
interleukin 1 family, member 5 (delta)A154Mus musculusMutation(s): 0 
Gene Names: IL36RNFil1dIl1f5Il1h3Il1hy1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9QYY1 (Mus musculus)
Explore Q9QYY1 
Go to UniProtKB:  Q9QYY1
IMPC:  MGI:1859325
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.204 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.932α = 90
b = 78.932β = 90
c = 69.74γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing
CNSrefinement
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-30
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance