1BFB

BASIC FIBROBLAST GROWTH FACTOR COMPLEXED WITH HEPARIN TETRAMER FRAGMENT

• PDB DOI: https://doi.org/10.2210/pdb1BFB/pdb

• Classification: GROWTH FACTOR
• Organism(s): Homo sapiens
• Mutation(s): Yes 


• Deposited: 1995-12-12 Released: 1996-04-03 
• Deposition Author(s): Faham, S., Rees, D.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work: 0.206 
• R-Value Observed: 0.206 

Literature

Heparin structure and interactions with basic fibroblast growth factor.

Faham, S., Hileman, R.E., Fromm, J.R., Linhardt, R.J., Rees, D.C.

(1996) Science 271: 1116-1120

• PubMed: 8599088 
• DOI: https://doi.org/10.1126/science.271.5252.1116
• Primary Citation of Related Structures:  
  1BFB, 1BFC


• PubMed Abstract: 
  

  Crystal structures of heparin-derived tetra- and hexasaccharides complexed with basic fibroblast growth factor (bFGF) were determined at resolutions of 1.9 and 2.2 angstroms, respectively. The heparin structure may be approximated as a helical polymer with a disaccharide rotation of 174 degrees and a translation of 8.6 angstroms along the helix axis. Both molecules bound similarly to a region of the bFGF surface containing residues asparagine-28, arginine-121, lysine-126, and glutamine-135, the hexasaccharide also interacted with an additional binding site formed by lysine-27, asparagine-102, and lysine-136. No significant conformational change in bFGF occurred upon heparin oligosaccharide binding, which suggests that heparin primarily serves to juxtapose components of the FGF signal transduction pathway.

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Organizational Affiliation: 

Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 17.67 kDa 
• Atom Count: 1,070 
• Modelled Residue Count: 124 
• Deposited Residue Count: 147 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BASIC FIBROBLAST GROWTH FACTOR	A	147	Homo sapiens	Mutation(s): 2
UniProt & NIH Common Fund Data Resources
Find proteins for P09038 (Homo sapiens) Explore P09038  Go to UniProtKB:  P09038
PHAROS:  P09038 GTEx:  ENSG00000138685

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
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	B	4		N/A
Glycosylation Resources
GlyTouCan:  G88016IC GlyCosmos:  G88016IC

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Work: 0.206 
• R-Value Observed: 0.206 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 32.02	α = 90
b = 41.8	β = 90
c = 85.87	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
MSC	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-04-03 
Deposition Author(s): Faham, S., Rees, D.C.

Revision History  

• Version 1.0: 1996-04-03
  Type: Initial release
  
• Version 1.1: 2008-03-24
  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: Atomic model, Data collection, Derived calculations, Other, Structure summary
• Version 2.1: 2021-11-03
  Changes: Database references, Structure summary
• Version 2.2: 2024-02-07
  Changes: Data collection