5MXA

Structure of unbound Interleukin-23


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Structural Activation of Pro-inflammatory Human Cytokine IL-23 by Cognate IL-23 Receptor Enables Recruitment of the Shared Receptor IL-12R beta 1.

Bloch, Y.Bouchareychas, L.Merceron, R.Skladanowska, K.Van den Bossche, L.Detry, S.Govindarajan, S.Elewaut, D.Haerynck, F.Dullaers, M.Adamopoulos, I.E.Savvides, S.N.

(2018) Immunity 48: 45-58.e6

  • DOI: 10.1016/j.immuni.2017.12.008
  • Primary Citation of Related Structures:  
    5N2K, 5MXA, 5MZV, 5NJD

  • PubMed Abstract: 
  • Interleukin-23 (IL-23), an IL-12 family cytokine, plays pivotal roles in pro-inflammatory T helper 17 cell responses linked to autoimmune and inflammatory diseases. Despite intense therapeutic targeting, structural and mechanistic insights into receptor complexes mediated by IL-23, and by IL-12 family members in general, have remained elusive ...

    Interleukin-23 (IL-23), an IL-12 family cytokine, plays pivotal roles in pro-inflammatory T helper 17 cell responses linked to autoimmune and inflammatory diseases. Despite intense therapeutic targeting, structural and mechanistic insights into receptor complexes mediated by IL-23, and by IL-12 family members in general, have remained elusive. We determined a crystal structure of human IL-23 in complex with its cognate receptor, IL-23R, and revealed that IL-23R bound to IL-23 exclusively via its N-terminal immunoglobulin domain. The structural and functional hotspot of this interaction partially restructured the helical IL-23p19 subunit of IL-23 and restrained its IL-12p40 subunit to cooperatively bind the shared receptor IL-12Rβ1 with high affinity. Together with structural insights from the interaction of IL-23 with the inhibitory antibody briakinumab and by leveraging additional IL-23:antibody complexes, we propose a mechanistic paradigm for IL-23 and IL-12 whereby cognate receptor binding to the helical cytokine subunits primes recruitment of the shared receptors via the IL-12p40 subunit.


    Related Citations: 
    • Preparation, crystallization and preliminary X-ray diffraction studies of the glycosylated form of human interleukin-23.
      Shirouzono, T., Chirifu, M., Nakamura, C., Yamagata, Y., Ikemizu, S.
      (2012) Acta Crystallogr Sect F Struct Biol Cryst Commun 68: 432

    Organizational Affiliation

    Laboratory for Protein Biochemistry and Biomolecular Engineering, Department of Biochemistry and Microbiology, Ghent University, 9052 Ghent, Belgium; VIB-UGent Center for Inflammation Research, 9052 Ghent, Belgium. Electronic address: savvas.savvides@ugent.be.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Interleukin-23 subunit alpha B198Homo sapiensMutation(s): 0 
Gene Names: IL23ASGRFUNQ2498/PRO5798
Find proteins for Q9NPF7 (Homo sapiens)
Explore Q9NPF7 
Go to UniProtKB:  Q9NPF7
NIH Common Fund Data Resources
PHAROS:  Q9NPF7
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Interleukin-12 subunit beta A328Homo sapiensMutation(s): 0 
Gene Names: IL12BNKSF2
Find proteins for P29460 (Homo sapiens)
Explore P29460 
Go to UniProtKB:  P29460
NIH Common Fund Data Resources
PHAROS:  P29460
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C
4 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.849α = 90
b = 109.849β = 90
c = 87.735γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
VLAIOBelgium--

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-20
    Type: Initial release
  • Version 1.1: 2018-01-03
    Changes: Database references
  • Version 1.2: 2018-01-10
    Changes: Database references
  • Version 1.3: 2018-01-31
    Changes: Database references
  • Version 1.4: 2018-02-07
    Changes: Structure summary
  • Version 1.5: 2019-08-14
    Changes: Data collection
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary