6O4O

The structure of human interleukin 11


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.62 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.177 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structure of the extracellular domains of human interleukin 11 alpha receptor reveals mechanisms of cytokine engagement.

Metcalfe, R.D.Aizel, K.Zlatic, C.O.Nguyen, P.M.Morton, C.J.Lio, D.S.Cheng, H.C.Dobson, R.C.J.Parker, M.W.Gooley, P.R.Putoczki, T.L.Griffin, M.D.W.

(2020) J Biol Chem 295: 8285-8301

  • DOI: https://doi.org/10.1074/jbc.RA119.012351
  • Primary Citation of Related Structures:  
    6O4O, 6O4P

  • PubMed Abstract: 

    Interleukin (IL) 11 activates multiple intracellular signaling pathways by forming a complex with its cell surface α-receptor, IL-11Rα, and the β-subunit receptor, gp130. Dysregulated IL-11 signaling has been implicated in several diseases, including some cancers and fibrosis. Mutations in IL-11Rα that reduce signaling are also associated with hereditary cranial malformations. Here we present the first crystal structure of the extracellular domains of human IL-11Rα and a structure of human IL-11 that reveals previously unresolved detail. Disease-associated mutations in IL-11Rα are generally distal to putative ligand-binding sites. Molecular dynamics simulations showed that specific mutations destabilize IL-11Rα and may have indirect effects on the cytokine-binding region. We show that IL-11 and IL-11Rα form a 1:1 complex with nanomolar affinity and present a model of the complex. Our results suggest that the thermodynamic and structural mechanisms of complex formation between IL-11 and IL-11Rα differ substantially from those previously reported for similar cytokines. This work reveals key determinants of the engagement of IL-11 by IL-11Rα that may be exploited in the development of strategies to modulate formation of the IL-11-IL-11Rα complex.


  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Interleukin-11169Homo sapiensMutation(s): 0 
Gene Names: IL11
UniProt & NIH Common Fund Data Resources
Find proteins for P20809 (Homo sapiens)
Explore P20809 
Go to UniProtKB:  P20809
PHAROS:  P20809
GTEx:  ENSG00000095752 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP20809
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.62 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.177 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.02α = 90
b = 133.762β = 90
c = 27.183γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)Australia--

Revision History  (Full details and data files)

  • Version 1.0: 2020-05-06
    Type: Initial release
  • Version 1.1: 2020-06-24
    Changes: Database references
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Refinement description