Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 50.30 kDa 
• Atom Count: 3695 
• Modelled Residue Count: 423 
• Deposited Residue Count: 430 
• Unique protein chains: 1

1BQU

CYTOKYNE-BINDING REGION OF GP130

• DOI: 10.2210/pdb1BQU/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-08-18 Released: 1998-08-26 
• Deposition Author(s): Bravo, J., Staunton, D., Heath, J.K., Jones, E.Y.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.255 
• R-Value Work: 0.221 
• R-Value Observed: 0.221 

Literature

Crystal structure of a cytokine-binding region of gp130.

Bravo, J., Staunton, D., Heath, J.K., Jones, E.Y.

(1998) EMBO J 17: 1665-1674

• PubMed: 9501088 
• DOI: 10.1093/emboj/17.6.1665
• Primary Citation of Related Structures:  
  1BQU


• PubMed Abstract: 
  

The structure of the cytokine-binding homology region of the cell surface receptor gp130 has been determined by X-ray crystallography at 2.0 A resolution. The beta sandwich structure of the two domains conforms to the topology of the cytokine receptor superfamily. This first structure of an uncomplexed receptor exhibits a similar L-shaped quaternary structure to that of ligand-bound family members and suggests a limited flexibility in relative domain orientation of some 3 degrees. The putative ligand-binding loops are relatively rigid, with a phenylalanine side chain similarly positioned to exposed aromatic residues implicated in ligand binding for other such receptors. The positioning and structure of the N-terminal portion of the polypeptide chain have implications for the structure and function of cytokine receptors, such as gp130, which contain an additional N-terminal immunoglobulin-like domain.

---

Organizational Affiliation: 

Laboratory of Molecular Biophysics, The Rex Richards Building, South Parks Road, Oxford OX1 3QU.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (GP130)	A, B	215	Homo sapiens	Mutation(s): 0  Gene Names: IL6ST
Find proteins for P40189 (Homo sapiens) Explore P40189  Go to UniProtKB:  P40189
NIH Common Fund Data Resources
PHAROS:  P40189 GTEx:  ENSG00000134352

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth A], E [auth A], H [auth B], I [auth B], J [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
GOL	F [auth A], G [auth A], K [auth B], L [auth B], M [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.255 
• R-Value Work: 0.221 
• R-Value Observed: 0.221 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 84.48	α = 90
b = 132.295	β = 90
c = 121.933	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-08-18 
• Released Date: 1998-08-26 
Deposition Author(s): Bravo, J., Staunton, D., Heath, J.K., Jones, E.Y.

Revision History  

• Version 1.0: 1998-08-26
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Atomic model, Non-polymer description, Version format compliance