3DI2

Crystal structure of the complex of human interleukin-7 with unglycosylated human interleukin-7 receptor alpha ectodomain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and Biophysical Studies of the Human IL-7/IL-7Ralpha Complex.

McElroy, C.A.Dohm, J.A.Walsh, S.T.

(2009) Structure 17: 54-65

  • DOI: 10.1016/j.str.2008.10.019
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • IL-7 and IL-7Ralpha bind the gamma(c) receptor, forming a complex crucial to several signaling cascades leading to the development and homeostasis of T and B cells. We report that the IL-7Ralpha ectodomain uses glycosylation to modulate its binding c ...

    IL-7 and IL-7Ralpha bind the gamma(c) receptor, forming a complex crucial to several signaling cascades leading to the development and homeostasis of T and B cells. We report that the IL-7Ralpha ectodomain uses glycosylation to modulate its binding constants to IL-7, unlike the other receptors in the gamma(c) family. IL-7 binds glycosylated IL-7Ralpha 300-fold more tightly than unglycosylated IL-7Ralpha, and the enhanced affinity is attributed primarily to an accelerated on rate. Structural comparison of IL-7 in complex to both forms of IL-7Ralpha reveals that glycosylation does not participate directly in the binding interface. The SCID mutations of IL-7Ralpha locate outside the binding interface with IL-7, suggesting that the expressed mutations cause protein folding defects in IL-7Ralpha. The IL-7/IL-7Ralpha structures provide a window into the molecular recognition events of the IL-7 signaling cascade and provide sites to target for designing new therapeutics to treat IL-7-related diseases.


    Organizational Affiliation

    Department of Molecular and Cellular Biochemistry, College of Medicine, Comprehensive Cancer Center, Ohio State University, 467 Hamilton Hall, 1645 Neil Avenue, Columbus, OH 43210, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interleukin-7
A, C
154Homo sapiensMutation(s): 1 
Gene Names: IL7
Find proteins for P13232 (Homo sapiens)
Go to Gene View: IL7
Go to UniProtKB:  P13232
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Interleukin-7 receptor subunit alpha
B, D
223Homo sapiensMutation(s): 1 
Gene Names: IL7R
Find proteins for P16871 (Homo sapiens)
Go to Gene View: IL7R
Go to UniProtKB:  P16871
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1PE
Query on 1PE

Download SDF File 
Download CCD File 
A
PENTAETHYLENE GLYCOL
PEG400
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.212 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 47.202α = 90.00
b = 113.021β = 105.10
c = 87.534γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-01-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance