5HHV

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1038/srep26071
  • Primary Citation of Related Structures:  

  • 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- ...

    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

    Sanford-Burnham Medical Research Institute, 10901 North Torrey Pines Road, San Diego, CA 92037, USA.,Pfizer Worldwide Research and Development, San Diego, CA 92121, USA.,Worldwide Research and Development, Pfizer Inc., Eastern Point Road, Groton, CT 06340 USA.,Worldwide Research and Development, Pfizer Inc., 610 Main Street, Cambridge, MA 02139, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-17A
A, B
123Homo sapiensMutation(s): 2 
Gene Names: IL17A (CTLA8, IL17)
Find proteins for Q16552 (Homo sapiens)
Go to Gene View: IL17A
Go to UniProtKB:  Q16552
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CAT-2000 FAB heavy chain
H
237N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
IL-17A peptide inhibitor
I
16N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
CAT-2000 FAB light chain
L
214N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ACE
Query on ACE
I
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.198 
  • Space Group: P 3 2 1
Unit Cell:
Length (Å)Angle (°)
a = 110.200α = 90.00
b = 110.200β = 90.00
c = 90.300γ = 120.00
Software Package:
Software NamePurpose
AutoPROCdata scaling
Aimlessdata scaling
BUSTERrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-01-11 
  • Released Date: 2016-06-01 
  • Deposition Author(s): Liu, S.

Revision History 

  • Version 1.0: 2016-06-01
    Type: Initial release
  • Version 1.1: 2017-11-22
    Type: Derived calculations, Refinement description