5HHX

Inhibiting complex IL-17A and IL-17RA interactions with a linear peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.180 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Inhibiting complex IL-17A and IL-17RA interactions with a linear peptide.

Liu, S.Desharnais, J.Sahasrabudhe, P.V.Jin, P.Li, W.Oates, B.D.Shanker, S.Banker, M.E.Chrunyk, B.A.Song, X.Feng, X.Griffor, M.Jimenez, J.Chen, G.Tumelty, D.Bhat, A.Bradshaw, C.W.Woodnutt, G.Lappe, R.W.Thorarensen, A.Qiu, X.Withka, J.M.Wood, L.D.

(2016) Sci Rep 6: 26071-26071

  • DOI: https://doi.org/10.1038/srep26071
  • Primary Citation of Related Structures:  
    5HHV, 5HHX

  • PubMed Abstract: 

    IL-17A is a pro-inflammatory cytokine that has been implicated in autoimmune and inflammatory diseases. Monoclonal antibodies inhibiting IL-17A signaling have demonstrated remarkable efficacy, but an oral therapy is still lacking. A high affinity IL-17A peptide antagonist (HAP) of 15 residues was identified through phage-display screening followed by saturation mutagenesis optimization and amino acid substitutions. HAP binds specifically to IL-17A and inhibits the interaction of the cytokine with its receptor, IL-17RA. Tested in primary human cells, HAP blocked the production of multiple inflammatory cytokines. Crystal structure studies revealed that two HAP molecules bind to one IL-17A dimer symmetrically. The N-terminal portions of HAP form a β-strand that inserts between two IL-17A monomers while the C-terminal section forms an α helix that directly blocks IL-17RA from binding to the same region of IL-17A. This mode of inhibition suggests opportunities for developing peptide antagonists against this challenging target.


  • Organizational Affiliation

    Worldwide Research and Development, Pfizer Inc., Eastern Point Road, Groton, CT 06340 USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Interleukin-17A
A, B
138Homo sapiensMutation(s): 0 
Gene Names: IL17ACTLA8IL17
UniProt & NIH Common Fund Data Resources
Find proteins for Q16552 (Homo sapiens)
Explore Q16552 
Go to UniProtKB:  Q16552
PHAROS:  Q16552
GTEx:  ENSG00000112115 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ16552
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CAT-2000 FAB heavy chainC [auth H]237Homo sapiensMutation(s): 0 
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  • Reference Sequence

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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
IL-17A peptide inhibitorD [auth I]16synthetic constructMutation(s): 0 
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
CAT-2000 FAB light chainE [auth L]214Homo sapiensMutation(s): 0 
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Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.180 
  • Space Group: P 3 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.4α = 90
b = 113.4β = 90
c = 86.79γ = 120
Software Package:
Software NamePurpose
BUSTERrefinement
autoPROCdata scaling
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

  • Released Date: 2016-06-01 
  • Deposition Author(s): Liu, S.

Revision History  (Full details and data files)

  • Version 1.0: 2016-06-01
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Derived calculations, Refinement description
  • Version 1.2: 2023-09-27
    Changes: Data collection, Database references, Refinement description
  • Version 1.3: 2024-10-09
    Changes: Structure summary