Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 84.45 kDa 
• Atom Count: 5247 
• Residue Count: 652 
• Unique protein chains: 2

1E0O

CRYSTAL STRUCTURE OF A TERNARY FGF1-FGFR2-HEPARIN COMPLEX

• DOI: 10.2210/pdb1E0O/pdb

• Classification: GROWTH FACTOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2000-04-03 Released: 2000-10-23 
• Deposition Author(s): Pellegrini, L., Burke, D.F., von Delft, F., Mulloy, B., Blundell, T.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.309 
• R-Value Work: 0.274 
• R-Value Observed: 0.274 

Literature

Crystal Structure of Fibroblast Growth Factor Receptor Ectodomain Bound to Ligand and Heparin

Pellegrini, L., Burke, D.F., von Delft, F., Mulloy, B., Blundell, T.L.

(2000) Nature 407: 1029

• PubMed: 11069186 
• DOI: 10.1038/35039551
• Primary Citation of Related Structures:  
  1E0O


• PubMed Abstract: 
  

Fibroblast growth factors (FGFs) are a large family of structurally related proteins with a wide range of physiological and pathological activities. Signal transduction requires association of FGF with its receptor tyrosine kinase (FGFR) and heparan sulphate proteoglycan in a specific complex on the cell surface. Direct involvement of the heparan sulphate glycosaminoglycan polysaccharide in the molecular association between FGF and its receptor is essential for biological activity. Although crystal structures of binary complexes of FGF-heparin and FGF-FGFR have been described, the molecular architecture of the FGF signalling complex has not been elucidated. Here we report the crystal structure of the FGFR2 ectodomain in a dimeric form that is induced by simultaneous binding to FGF1 and a heparin decasaccharide. The complex is assembled around a central heparin molecule linking two FGF1 ligands into a dimer that bridges between two receptor chains. The asymmetric heparin binding involves contacts with both FGF1 molecules but only one receptor chain. The structure of the FGF1-FGFR2-heparin ternary complex provides a structural basis for the essential role of heparan sulphate in FGF signalling.

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Organizational Affiliation: 

Department of Biochemistry, University of Cambridge, UK. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FIBROBLAST GROWTH FACTOR 1	A, C	140	Homo sapiens	Mutation(s): 0  Gene Names: FGF1, FGFA
Find proteins for P05230 (Homo sapiens) Explore P05230  Go to UniProtKB:  P05230
NIH Common Fund Data Resources
PHAROS  P05230 GTEx  ENSG00000113578

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
FIBROBLAST GROWTH FACTOR RECEPTOR 2	B, D	219	Homo sapiens	Mutation(s): 0  Gene Names: FGFR2, BEK, KGFR, KSAM EC: 2.7.10.1
Find proteins for P21802 (Homo sapiens) Explore P21802  Go to UniProtKB:  P21802
NIH Common Fund Data Resources
PHAROS  P21802 GTEx  ENSG00000066468

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
2-O-sulfo-alpha-L-idopyranuronic acid-(1-4)-2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranose-(1-4)-2-O-sulfo-alpha-L-idopyranuronic acid-(1-4)-2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranose-(1-4)-2-O-sulfo-alpha-L-idopyranuronic acid-(1-4)-2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranose-(1-4)-2-O-sulfo-alpha-L-idopyranuronic acid-(1-4)-2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranose-(1-4)-2-O-sulfo-alpha-L-idopyranuronic acid-(1-4)-2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranose	E	10		N/A

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C, D	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
NI	A, B, C, D	NICKEL (II) ION Ni VEQPNABPJHWNSG-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.309 
• R-Value Work: 0.274 
• R-Value Observed: 0.274 
• Space Group: P 6₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 195.9	α = 90
b = 195.9	β = 90
c = 68.86	γ = 120

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
SHARP	phasing
SHELX	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-04-03 
• Released Date: 2000-10-23 
Deposition Author(s): Pellegrini, L., Burke, D.F., von Delft, F., Mulloy, B., Blundell, T.L.

Revision History 

• Version 1.0: 2000-10-23
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-12-13
  Changes: Database references, Source and taxonomy, Structure summary
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary