3OJV

Crystal Structure of FGF1 complexed with the ectodomain of FGFR1c exhibiting an ordered ligand specificity-determining betaC'-betaE loop


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.251 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Plasticity in Interactions of Fibroblast Growth Factor 1 (FGF1) N Terminus with FGF Receptors Underlies Promiscuity of FGF1.

Beenken, A.Eliseenkova, A.V.Ibrahimi, O.A.Olsen, S.K.Mohammadi, M.

(2012) J.Biol.Chem. 287: 3067-3078

  • DOI: 10.1074/jbc.M111.275891
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Tissue-specific alternative splicing in the second half of Ig-like domain 3 (D3) of fibroblast growth factor receptors 1-3 (FGFR1 to -3) generates epithelial FGFR1b-FGFR3b and mesenchymal FGFR1c-FGFR3c splice isoforms. This splicing event establishes ...

    Tissue-specific alternative splicing in the second half of Ig-like domain 3 (D3) of fibroblast growth factor receptors 1-3 (FGFR1 to -3) generates epithelial FGFR1b-FGFR3b and mesenchymal FGFR1c-FGFR3c splice isoforms. This splicing event establishes a selectivity filter to restrict the ligand binding specificity of FGFRb and FGFRc isoforms to mesenchymally and epithelially derived fibroblast growth factors (FGFs), respectively. FGF1 is termed the "universal FGFR ligand" because it overrides this specificity barrier. To elucidate the molecular basis for FGF1 cross-reactivity with the "b" and "c" splice isoforms of FGFRs, we determined the first crystal structure of FGF1 in complex with an FGFRb isoform, FGFR2b, at 2.1 Å resolution. Comparison of the FGF1-FGFR2b structure with the three previously published FGF1-FGFRc structures reveals that plasticity in the interactions of the N-terminal region of FGF1 with FGFR D3 is the main determinant of FGF1 cross-reactivity with both isoforms of FGFRs. In support of our structural data, we demonstrate that substitution of three N-terminal residues (Gly-19, His-25, and Phe-26) of FGF2 (a ligand that does not bind FGFR2b) for the corresponding residues of FGF1 (Phe-16, Asn-22, and Tyr-23) enables the FGF2 triple mutant to bind and activate FGFR2b. These findings taken together with our previous structural data on receptor binding specificity of FGF2, FGF8, and FGF10 conclusively show that sequence divergence at the N termini of FGFs is the primary regulator of the receptor binding specificity and promiscuity of FGFs.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heparin-binding growth factor 1
A, B
136Homo sapiensMutation(s): 0 
Gene Names: FGF1 (FGFA)
Find proteins for P05230 (Homo sapiens)
Go to Gene View: FGF1
Go to UniProtKB:  P05230
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Basic fibroblast growth factor receptor 1
C, D
226N/AMutation(s): 1 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SGN
Query on SGN

Download SDF File 
Download CCD File 
A
N,O6-DISULFO-GLUCOSAMINE
C6 H13 N O11 S2
DQTRACMFIGDHSN-UKFBFLRUSA-N
 Ligand Interaction
UAP
Query on UAP

Download SDF File 
Download CCD File 
A
4-deoxy-2-O-sulfo-alpha-L-threo-hex-4-enopyranuronic acid
C6 H8 O9 S
VJIMUKBSNUBECH-YKKSOZKNSA-N
 Ligand Interaction
IDS
Query on IDS

Download SDF File 
Download CCD File 
A
2-O-sulfo-alpha-L-idopyranuronic acid
O2-SULFO-GLUCURONIC ACID
C6 H10 O10 S
COJBCAMFZDFGFK-VCSGLWQLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.251 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 53.324α = 106.44
b = 53.421β = 106.40
c = 80.463γ = 94.44
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2012-03-07
    Type: Database references