3F1R

Crystal structure of FGF20 dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.256 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Homodimerization controls the fibroblast growth factor 9 subfamily's receptor binding and heparan sulfate-dependent diffusion in the extracellular matrix

Kalinina, J.Byron, S.A.Makarenkova, H.P.Olsen, S.K.Eliseenkova, A.V.Larochelle, W.J.Dhanabal, M.Blais, S.Ornitz, D.M.Day, L.A.Neubert, T.A.Pollock, P.M.Mohammadi, M.

(2009) Mol Cell Biol 29: 4663-4678

  • DOI: 10.1128/MCB.01780-08
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Uncontrolled fibroblast growth factor (FGF) signaling can lead to human diseases, necessitating multiple layers of self-regulatory control mechanisms to keep its activity in check. Herein, we demonstrate that FGF9 and FGF20 ligands undergo a reversib ...

    Uncontrolled fibroblast growth factor (FGF) signaling can lead to human diseases, necessitating multiple layers of self-regulatory control mechanisms to keep its activity in check. Herein, we demonstrate that FGF9 and FGF20 ligands undergo a reversible homodimerization, occluding their key receptor binding sites. To test the role of dimerization in ligand autoinhibition, we introduced structure-based mutations into the dimer interfaces of FGF9 and FGF20. The mutations weakened the ability of the ligands to dimerize, effectively increasing the concentrations of monomeric ligands capable of binding and activating their cognate FGF receptor in vitro and in living cells. Interestingly, the monomeric ligands exhibit reduced heparin binding, resulting in their increased radii of heparan sulfate-dependent diffusion and biologic action, as evidenced by the wider dilation area of ex vivo lung cultures in response to implanted mutant FGF9-loaded beads. Hence, our data demonstrate that homodimerization autoregulates FGF9 and FGF20's receptor binding and concentration gradients in the extracellular matrix. Our study is the first to implicate ligand dimerization as an autoregulatory mechanism for growth factor bioactivity and sets the stage for engineering modified FGF9 subfamily ligands, with desired activity for use in both basic and translational research.


    Organizational Affiliation

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



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fibroblast growth factor 20A, B211Homo sapiensMutation(s): 0 
Gene Names: FGF20
Find proteins for Q9NP95 (Homo sapiens)
Explore Q9NP95 
Go to UniProtKB:  Q9NP95
NIH Common Fund Data Resources
PHAROS  Q9NP95
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.256 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.144α = 90
b = 102.144β = 90
c = 119.8γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
AMoREphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance