Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 84.81 kDa 
• Atom Count: 5496 
• Residue Count: 665 
• Unique protein chains: 2

1FQ9

CRYSTAL STRUCTURE OF A TERNARY FGF2-FGFR1-HEPARIN COMPLEX

• DOI: 10.2210/pdb1FQ9/pdb

• Classification: GROWTH FACTOR/GROWTH FACTOR RECEPTOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2000-09-04 Released: 2000-09-27 
• Deposition Author(s): Schlessinger, J., Plotnikov, A.N., Ibrahimi, O.A., Eliseenkova, A.V., Yeh, B.K., Yayon, A., Linhardt, R.J., Mohammadi, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.282 
• R-Value Work: 0.229 

Literature

Crystal structure of a ternary FGF-FGFR-heparin complex reveals a dual role for heparin in FGFR binding and dimerization.

Schlessinger, J., Plotnikov, A.N., Ibrahimi, O.A., Eliseenkova, A.V., Yeh, B.K., Yayon, A., Linhardt, R.J., Mohammadi, M.

(2000) Mol Cell 6: 743-750

• PubMed: 11030354 
• DOI: 10.1016/s1097-2765(00)00073-3
• Primary Citation of Related Structures:  
  1FQ9


• PubMed Abstract: 
  

The crystal structure of a dimeric 2:2:2 FGF:FGFR:heparin ternary complex at 3 A resolution has been determined. Within each 1:1 FGF:FGFR complex, heparin makes numerous contacts with both FGF and FGFR, thereby augmenting FGF-FGFR binding. Heparin also interacts with FGFR in the adjoining 1:1 FGF:FGFR complex to promote FGFR dimerization. The 6-O-sulfate group of heparin plays a pivotal role in mediating both interactions. The unexpected stoichiometry of heparin binding in the structure led us to propose a revised model for FGFR dimerization. Biochemical data in support of this model are also presented. This model provides a structural basis for FGFR activation by small molecule heparin analogs and may facilitate the design of heparin mimetics capable of modulating FGF signaling.

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Organizational Affiliation: 

Department of Pharmacology, New York University School of Medicine, New York, New York 10016, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FIBROBLAST GROWTH FACTOR 2	A, B	132	Homo sapiens	Mutation(s): 2  Gene Names: FGF2, FGFB
Find proteins for P09038 (Homo sapiens) Explore P09038  Go to UniProtKB:  P09038
NIH Common Fund Data Resources
PHAROS  P09038 GTEx  ENSG00000138685

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
FIBROBLAST GROWTH FACTOR RECEPTOR 1	C, D	225	Homo sapiens	Mutation(s): 1  Gene Names: FGFR1, BFGFR, CEK, FGFBR, FLG, FLT2, HBGFR EC: 2.7.10.1
Find proteins for P11362 (Homo sapiens) Explore P11362  Go to UniProtKB:  P11362
NIH Common Fund Data Resources
PHAROS  P11362 GTEx  ENSG00000077782

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
4-deoxy-2-O-sulfo-alpha-L-threo-hex-4-enopyranuronic 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-beta-L-altropyranuronic acid-(1-4)-2-deoxy-6-O-sulfo-2-(sulfoamino)-alpha-D-glucopyranose	E	8	N/A	N/A

Entity ID: 4
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
4-deoxy-2-O-sulfo-alpha-L-threo-hex-4-enopyranuronic 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	F	6		N/A

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.282 
• R-Value Work: 0.229 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 98.888	α = 90
b = 98.888	β = 90
c = 196.292	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-09-04 
• Released Date: 2000-09-27 
Deposition Author(s): Schlessinger, J., Plotnikov, A.N., Ibrahimi, O.A., Eliseenkova, A.V., Yeh, B.K., Yayon, A., Linhardt, R.J., Mohammadi, M.

Revision History 

• Version 1.0: 2000-09-27
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary