1ILR

CRYSTAL STRUCTURE OF THE INTERLEUKIN-1 RECEPTOR ANTAGONIST


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 

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This is version 1.3 of the entry. See complete history


Literature

Refined crystal structure of the interleukin-1 receptor antagonist. Presence of a disulfide link and a cis-proline.

Schreuder, H.A.Rondeau, J.M.Tardif, C.Soffientini, A.Sarubbi, E.Akeson, A.Bowlin, T.L.Yanofsky, S.Barrett, R.W.

(1995) Eur J Biochem 227: 838-847

  • DOI: 10.1111/j.1432-1033.1995.tb20209.x
  • Primary Citation of Related Structures:  
    1ILR

  • PubMed Abstract: 
  • Interleukin-1 (IL-1) molecules are cytokines involved in the acute-phase response against infection and injury. Three naturally occurring IL-1 molecules are known, two agonists: IL-1 alpha and IL-1 beta, and one antagonist, the IL-1 receptor antagonist (IL-1ra) ...

    Interleukin-1 (IL-1) molecules are cytokines involved in the acute-phase response against infection and injury. Three naturally occurring IL-1 molecules are known, two agonists: IL-1 alpha and IL-1 beta, and one antagonist, the IL-1 receptor antagonist (IL-1ra). Although IL-1 action protects the organism by enhancing the response to pathogens, its overproduction can lead to pathology and has been implicated in disease states that include septic shock, rheumatoid arthritis, graft versus host disease and certain leukemias. The crystal structure of IL-1ra has been solved at 0.21-nm resolution by molecular replacement using the IL-1 beta structure as a search model. The crystals contain two independent IL-1ra molecules which are very similar. IL-1ra has the same fold as IL-1 alpha and IL-1 beta. The fold consists of twelve beta-strands which form a six-stranded beta-barrel, closed on one side by three beta-hairpin loops. Cys69 and Cys116 are linked via a disulfide bond and Pro53 has been built in the cis-conformation. Comparison of the IL-1ra structure with the IL-1 alpha and IL-1 beta structures present in the Protein Data Bank shows that a putative receptor interaction region, involving the N-terminus up to the beginning of strand beta 1 and the loops D and G, is very different in the three IL-1 molecules. Other putative interaction regions, as identified with mutagenesis studies, are structurally conserved and rigid, allowing precise and specific interactions with the IL-1 receptor.


    Organizational Affiliation

    Marion Merrell Dow Research Institute, Strasbourg, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
INTERLEUKIN-1 RECEPTOR ANTAGONIST PROTEIN 12152Homo sapiensMutation(s): 0 
Gene Names: IL1RNIL1F3IL1RA
Find proteins for P18510 (Homo sapiens)
Explore P18510 
Go to UniProtKB:  P18510
NIH Common Fund Data Resources
PHAROS:  P18510
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.3α = 90
b = 71.3β = 90
c = 117.3γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-02-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other