4P0K

Crystal Structure of Double Loop-Swapped Interleukin-36Ra

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history. 

Literature

Molecular Determinants of Agonist and Antagonist Signaling through the IL-36 Receptor.

Gunther, S., Sundberg, E.J.

(2014) J Immunol. 193: 921-930

  • DOI: 10.4049/jimmunol.1400538
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • The IL-1 family consists of 11 cytokines that control a complex network of proinflammatory signals critical for regulating immune responses to infections. They also play a central role in numerous chronic inflammatory disorders. Accordingly, inhibiti ...

    The IL-1 family consists of 11 cytokines that control a complex network of proinflammatory signals critical for regulating immune responses to infections. They also play a central role in numerous chronic inflammatory disorders. Accordingly, inhibiting the activities of these cytokines is an important therapeutic strategy for treating autoimmune diseases and lymphomas. Agonist cytokines in the IL-1 family activate signaling by binding their cognate receptor and then recruiting a receptor accessory protein. Conversely, antagonist cytokines bind their cognate receptor but prohibit recruitment of receptor accessory protein, which precludes functional signaling complexes. The IL-36 subfamily of cytokines is the most diverse, including three agonists and at least one antagonist, and is the least well-characterized group within this family. Signaling through the IL-36 receptor directly stimulates dendritic cells and primes naive CD4 T cells for Th1 responses. Appropriately balanced IL-36 signaling is a critical determinant of skin and lung health. IL-36 signaling has been presumed to function analogously to IL-1 signaling. In this study, we have defined molecular determinants of agonist and antagonist signaling through the IL-36 receptor. We present the crystal structure of IL-36γ, which, to our knowledge, is the first reported structure of an IL-36 agonist. Using this structure as a guide, we designed a comprehensive series of IL-36 agonist/antagonist chimeric proteins for which we measured binding to the IL-36 receptor/IL-1 receptor accessory protein complex and functional activation and inhibition of signaling. Our data reveal how the fine specificity of IL-36 signaling is distinct from that of IL-1.

    Organizational Affiliation: 

    Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD 21201;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-36 receptor antagonist/Interleukin-36 gamma chimera protein
A
154Homo sapiensMutation(s): 1 
Gene Names: IL36RN (FIL1D, IL1F5, IL1HY1, IL1L1, IL1RP3), IL36G (IL1E, IL1F9, IL1H1, IL1RP2)
Find proteins for Q9UBH0 (Homo sapiens)
Go to Gene View: IL36RN
Go to UniProtKB:  Q9UBH0
Find proteins for Q9NZH8 (Homo sapiens)
Go to Gene View: IL36G
Go to UniProtKB:  Q9NZH8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.195 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 43.115α = 90.00
b = 43.115β = 90.00
c = 119.122γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
PDB_EXTRACTdata extraction
XDSdata scaling
PHENIXrefinement
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
American Asthma FoundationUnited States13-0066

Revision History 

  • Version 1.0: 2014-06-25
    Type: Initial release
  • Version 1.1: 2014-07-16
    Type: Database references
  • Version 1.2: 2015-02-04
    Type: Derived calculations
  • Version 1.3: 2017-10-04
    Type: Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary