5NAN

Crystal Structure of human IL-17AF in complex with human IL-17RA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.189 

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This is version 2.0 of the entry. See complete history


Literature

The human IL-17A/F heterodimer: a two-faced cytokine with unique receptor recognition properties.

Goepfert, A.Lehmann, S.Wirth, E.Rondeau, J.M.

(2017) Sci Rep 7: 8906-8906

  • DOI: 10.1038/s41598-017-08360-9
  • Primary Citation of Related Structures:  
    5N92, 5NAN

  • PubMed Abstract: 
  • IL-17A and IL-17F are prominent members of the IL-17 family of cytokines that regulates both innate and adaptive immunity. IL-17A has been implicated in chronic inflammatory and autoimmune diseases, and anti-IL-17A antibodies have shown remarkable clinical efficacy in psoriasis and psoriatic arthritis patients ...

    IL-17A and IL-17F are prominent members of the IL-17 family of cytokines that regulates both innate and adaptive immunity. IL-17A has been implicated in chronic inflammatory and autoimmune diseases, and anti-IL-17A antibodies have shown remarkable clinical efficacy in psoriasis and psoriatic arthritis patients. IL-17A and IL-17F are homodimeric cytokines that can also form the IL-17A/F heterodimer whose precise role in health and disease remains elusive. All three cytokines signal through the assembly of a ternary complex with the IL-17RA and IL-17RC receptors. Here we report the X-ray analysis of the human IL-17A/F heterodimer that reveals a two-faced cytokine closely mimicking IL-17A as well as IL-17F. We also present the crystal structure of its complex with the IL-17RA receptor. Unexpectedly in view of the much higher affinity of this receptor toward IL-17A, we find that IL-17RA is bound to the "F-face" of the heterodimer in the crystal. Using site-directed mutagenesis, we then demonstrate that IL-17RA can also bind to the "A-face" of IL-17A/F with similar affinity. Further, we show that IL-17RC does not discriminate between the two faces of the cytokine heterodimer either, thus enabling the formation of two topologically-distinct heterotrimeric complexes with potentially different signaling properties.


    Organizational Affiliation

    Novartis Institutes for BioMedical Research, Novartis Pharma AG, CH-4002, Basel, Switzerland. jeanmichel.rondeau@novartis.com.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Interleukin-17AA, D132Homo sapiensMutation(s): 0 
Gene Names: IL17ACTLA8IL17
UniProt & NIH Common Fund Data Resources
Find proteins for Q16552 (Homo sapiens)
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Go to UniProtKB:  Q16552
PHAROS:  Q16552
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Interleukin-17 receptor AB, C311Homo sapiensMutation(s): 0 
Gene Names: IL17RAIL17R
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Find proteins for Q96F46 (Homo sapiens)
Explore Q96F46 
Go to UniProtKB:  Q96F46
PHAROS:  Q96F46
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Interleukin-17FE, F139Homo sapiensMutation(s): 0 
Gene Names: IL17F
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Find proteins for Q96PD4 (Homo sapiens)
Explore Q96PD4 
Go to UniProtKB:  Q96PD4
PHAROS:  Q96PD4
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  • Reference Sequence
Oligosaccharides

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Entity ID: 4
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[beta-D-galactopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseG3 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
H [auth B], I [auth C], J [auth C], K [auth C], L [auth E]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.189 
  • Space Group: P 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.002α = 90
b = 66.103β = 90.13
c = 104.119γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
BUSTERrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-09-06
    Type: Initial release
  • Version 1.1: 2017-09-13
    Changes: Structure summary
  • Version 1.2: 2017-09-20
    Changes: Database references
  • Version 1.3: 2018-01-24
    Changes: Source and taxonomy
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary