1HZI

INTERLEUKIN-4 MUTANT E9A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of interleukin 4 mutant E9A suggests polar steering in receptor-complex formation.

Hulsmeyer, M.Scheufler, C.Dreyer, M.K.

(2001) Acta Crystallogr.,Sect.D 57: 1334-1336


  • PubMed Abstract: 
  • Interleukin 4 (IL-4) is a pleiotropic cytokine which induces T-cell differentiation and class switching of B cells. It therefore plays a central role in the development of allergies and asthma. An IL-4 variant in which Glu9 was mutated to alanine sho ...

    Interleukin 4 (IL-4) is a pleiotropic cytokine which induces T-cell differentiation and class switching of B cells. It therefore plays a central role in the development of allergies and asthma. An IL-4 variant in which Glu9 was mutated to alanine shows an 800-fold drop in binding affinity towards its high-affinity receptor chain. As shown by surface plasmon resonance measurements, this mostly arises from a decreased association rate. Here, the crystal structure of this mutant is reported. It reveals that the protein has a virtually identical structure to the wild type, showing that the unusual behaviour of the mutated protein is not a consequence of misfolding. The possibility that polar interactions in the encounter complex have a steering effect is discussed.


    Related Citations: 
    • A MIXED-CHARGE PAIR IN HUMAN INTERLEUKIN 4 DOMINATES HIGH-AFFINITY INTERACTION WITH THE RECEPTOR A CHAIN
      Wang, Y.,Shen, B.-J.,Sebald, W.
      (1997) Proc.Natl.Acad.Sci.USA 94: 1657
    • Crystal Structure of the Interleukin-4/Receptor a chain complex reveals a mosaic binding interface
      Hage, T.,Sebald, W.,Reinemer, P.
      (1999) Cell 97: 271


    Organizational Affiliation

    Physiologische Chemie II, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. martin.huelsmeyer@charite.de




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INTERLEUKIN-4
A
129Homo sapiensGene Names: IL4
Find proteins for P05112 (Homo sapiens)
Go to Gene View: IL4
Go to UniProtKB:  P05112
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.225 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 91.050α = 90.00
b = 91.050β = 90.00
c = 45.600γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-08-29
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance