6H41

Structure of the complex of the IL-5 inhibitory peptide AF17121 bound to the IL-5 receptor IL-5Ralpha


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis of Interleukin-5 Inhibition by the Small Cyclic Peptide AF17121.

Scheide-Noeth, J.P.Rosen, M.Baumstark, D.Dietz, H.Mueller, T.D.

(2019) J. Mol. Biol. 431: 714-731

  • DOI: 10.1016/j.jmb.2018.11.029

  • PubMed Abstract: 
  • Interleukin-5 (IL-5) is a T-helper cell of subtype 2 cytokine involved in many aspects of eosinophil life. Eosinophilic granulocytes play a pathogenic role in the progression of atopic diseases, such as allergy, asthma and atopic dermatitis and hyper ...

    Interleukin-5 (IL-5) is a T-helper cell of subtype 2 cytokine involved in many aspects of eosinophil life. Eosinophilic granulocytes play a pathogenic role in the progression of atopic diseases, such as allergy, asthma and atopic dermatitis and hypereosinophilic syndromes. Here, eosinophils upon activation degranulate leading to the release of proinflammatory proteins and mediators stored in intracellular vesicles termed granula thereby causing local inflammation, which when persisting leads to tissue damage and organ failure. As a key regulator of eosinophil function, IL-5 therefore presents a major pharmaceutical target and approaches to interfere with IL-5 receptor activation are of great interest. Here we present the structure of the IL-5 inhibiting peptide AF17121 bound to the extracellular domain of the IL-5 receptor IL-5Rα. The small 18mer cyclic peptide snugly fits into the wrench-like cleft of the IL-5 receptor, thereby blocking access of key residues for IL-5 binding. While AF17121 and IL-5 seemingly bind to a similar epitope at IL-5Rα, functional studies show that recognition and binding of both ligands differ. Using the structure data, peptide variants with improved IL-5 inhibition have been generated, which might present valuable starting points for superior peptide-based IL-5 antagonists.


    Related Citations: 
    • Structure analysis of the IL-5 ligand-receptor complex reveals a wrench-like architecture for IL-5Ralpha.
      Patino, E.,Kotzsch, A.,Saremba, S.,Nickel, J.,Schmitz, W.,Sebald, W.,Mueller, T.D.
      (2011) Structure 19: 1864


    Organizational Affiliation

    Department of Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute of the University Wuerzburg, Julius-von-Sachs-Platz 2, D-97082, Wuerzburg, Germany.,Department of Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute of the University Wuerzburg, Julius-von-Sachs-Platz 2, D-97082, Wuerzburg, Germany. Electronic address: mueller@biozentrum.uni-wuerzburg.de.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-5 receptor subunit alpha
A
309Homo sapiensMutation(s): 1 
Gene Names: IL5RA (IL5R)
Find proteins for Q01344 (Homo sapiens)
Go to Gene View: IL5RA
Go to UniProtKB:  Q01344
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
VAL-ASP-GLU-CYS-TRP-ARG-ILE-ILE-ALA-SER-HIS-THR-TRP-PHE-CYS-ALA-GLU-GLU
B
18N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.202 
  • Space Group: P 64 2 2
Unit Cell:
Length (Å)Angle (°)
a = 138.061α = 90.00
b = 138.061β = 90.00
c = 145.855γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
PDB_EXTRACTdata extraction
SCALAdata scaling
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanyMU1095/7-1

Revision History 

  • Version 1.0: 2018-12-26
    Type: Initial release
  • Version 1.1: 2019-02-27
    Type: Data collection, Database references