Biological Assembly 1  

 3D View: Structure

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 14.99 kDa 
• Atom Count: 1081 
• Modelled Residue Count: 129 
• Deposited Residue Count: 129 
• Unique protein chains: 1

1RCB

CRYSTAL STRUCTURE OF HUMAN RECOMBINANT INTERLEUKIN-4 AT 2.25 ANGSTROMS RESOLUTION

• DOI: 10.2210/pdb1RCB/pdb

• Classification: CYTOKINE
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1992-08-26 Released: 1993-10-31 
• Deposition Author(s): Wlodawer, A., Pavlovsky, A., Gustchina, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Observed: 0.218 

Literature

Crystal structure of human recombinant interleukin-4 at 2.25 A resolution.

Wlodawer, A., Pavlovsky, A., Gustchina, A.

(1992) FEBS Lett 309: 59-64

• PubMed: 1511746 
• DOI: 10.1016/0014-5793(92)80739-4
• Primary Citation of Related Structures:  
  1RCB


• PubMed Abstract: 
  

The crystal structure of human recombinant interleukin-4 (IL-4) has been solved by multiple isomorphous replacement, and refined to an R factor of 0.218 at 2.25 A resolution. The molecule is a left-handed four-helix bundle with a short stretch of beta sheet. The structure bears close resemblance to other cytokines such as granulocyte-macrophage colony stimulating factor (GM-CSF). Although no sequence similarity of IL-4 to GM-CSF and other related cytokines has been previously postulated, structure-based alignment of IL-4 and GM-CSF revealed that the core of the molecules, including large parts of all four helices and extending over half of the molecule, has 30% sequence identity. This may have identified regions which are not only important to maintain structure, but could also play a role in receptor binding.

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Organizational Affiliation: 

Macromolucar Structure Laboratory, NCI-Fredrick Cancer Research and Development Center, MD 21702.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INTERLEUKIN-4	A	129	Homo sapiens	Mutation(s): 0  Gene Names: IL4
Find proteins for P05112 (Homo sapiens) Explore P05112  Go to UniProtKB:  P05112
NIH Common Fund Data Resources
PHAROS:  P05112 GTEx:  ENSG00000113520

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Observed: 0.218 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 91.8	α = 90
b = 91.8	β = 90
c = 46.4	γ = 90

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1992-08-26 
• Released Date: 1993-10-31 
Deposition Author(s): Wlodawer, A., Pavlovsky, A., Gustchina, A.

Revision History  

• Version 1.0: 1993-10-31
  Type: Initial release
  
• Version 1.1: 2008-03-21
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance