2UUS

Crystal structure of the rat FGF1-sucrose octasulfate (SOS) complex.

• PDB DOI: https://doi.org/10.2210/pdb2UUS/pdb

• Classification: GROWTH FACTOR
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-03-07 Released: 2008-05-13 
• Deposition Author(s): Kulahin, N., Kiselyov, V., Kochoyan, A., Kristensen, O., Berezin, V., Bock, E., Gajhede, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 
  0.277 (Depositor), 0.280 (DCC) 
• R-Value Work: 
  0.206 (Depositor), 0.210 (DCC) 
• R-Value Observed: 
  0.210 (Depositor) 

Starting Model: experimental

Literature

Dimerization Effect of Sucrose Octasulfate on Rat Fgf1.

Kulahin, N., Kiselyov, V., Kochoyan, A., Kristensen, O., Kastrup, J.S., Berezin, V., Bock, E., Gajhede, M.

(2008) Acta Crystallogr Sect F Struct Biol Cryst Commun 64: 448

• PubMed: 18540049 
• DOI: https://doi.org/10.1107/S174430910801066X
• Primary Citation of Related Structures:  
  2UUS


• PubMed Abstract: 
  

  Fibroblast growth factors (FGFs) constitute a family of at least 23 structurally related heparin-binding proteins that are involved in regulation of cell growth, survival, differentiation and migration. Sucrose octasulfate (SOS), a chemical analogue of heparin, has been demonstrated to activate FGF signalling pathways. The structure of rat FGF1 crystallized in the presence of SOS has been determined at 2.2 A resolution. SOS-mediated dimerization of FGF1 was observed, which was further supported by gel-filtration experiments. The major contributors to the sulfate-binding sites in rat FGF1 are Lys113, Lys118, Arg122 and Lys128. An arginine at position 116 is a consensus residue in mammalian FGF molecules; however, it is a serine in rat FGF1. This difference may be important for SOS-mediated FGF1 dimerization in rat.

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Organizational Affiliation: 

Protein Laboratory, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark. [e-mail]

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PQS (software)

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 30.93 kDa 
• Atom Count: 2,361 
• Modelled Residue Count: 261 
• Deposited Residue Count: 264 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEPARIN-BINDING GROWTH FACTOR 1	A, B	132	Rattus norvegicus	Mutation(s): 0
UniProt
Find proteins for P61149 (Rattus norvegicus) Explore P61149  Go to UniProtKB:  P61149

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
1,3,4,6-tetra-O-sulfo-beta-D-fructofuranose-(2-1)-2,3,4,6-tetra-O-sulfonato-alpha-D-glucopyranose	C	2		N/A
Glycosylation Resources
GlyTouCan:  G97555GV GlyCosmos:  G97555GV

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_900013	C	sucrose octasulfate	Oligosaccharide / Substrate analog

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free:  0.277 (Depositor), 0.280 (DCC) 
• R-Value Work:  0.206 (Depositor), 0.210 (DCC) 
• R-Value Observed: 0.210 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 36.883	α = 90
b = 52.778	β = 97.43
c = 73.127	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-05-13 
Deposition Author(s): Kulahin, N., Kiselyov, V., Kochoyan, A., Kristensen, O., Berezin, V., Bock, E., Gajhede, M.

Revision History  

• Version 1.0: 2008-05-13
  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: 2019-07-24
  Changes: Data collection
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Other, Structure summary
• Version 2.1: 2023-12-13
  Changes: Data collection, Database references, Refinement description, Structure summary