5W59

Crystal structure of a monomeric human FGF9 in complex with the ectodomain of human FGFR1c

  • Classification: CYTOKINE
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli
  • Mutation(s): Yes 

  • Deposited: 2017-06-14 Released: 2017-08-16 
  • Deposition Author(s): Mohammadi, M., Ma, J., Liu, Y.
  • Funding Organization(s): National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.176 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Regulation of Receptor Binding Specificity of FGF9 by an Autoinhibitory Homodimerization.

Liu, Y.Ma, J.Beenken, A.Srinivasan, L.Eliseenkova, A.V.Mohammadi, M.

(2017) Structure 25: 1325-1336.e3

  • DOI: https://doi.org/10.1016/j.str.2017.06.016
  • Primary Citation of Related Structures:  
    5W59

  • PubMed Abstract: 

    The epithelial fibroblast growth factor 9 (FGF9) subfamily specifically binds and activates the mesenchymal "c" splice isoform of FGF receptors 1-3 (FGFR1-3) to regulate organogenesis and tissue homeostasis. The unique N and C termini of FGF9 subfamily ligands mediate a reversible homodimerization that occludes major receptor binding sites within the ligand core region. Here we provide compelling X-ray crystallographic, biophysical, and biochemical data showing that homodimerization controls receptor binding specificity of the FGF9 subfamily by keeping the concentration of active FGF9 monomers at a level, which is sufficient for a normal FGFR "c" isoform binding/signaling, but is insufficient for an illegitimate FGFR "b" isoform binding/signaling. We show that deletion of the N terminus or alanine substitutions in the C terminus of FGF9 skews the delicate ligand equilibrium toward active FGF9 monomers causing off-target binding and activation of FGFR b isoforms. Our study is the first to implicate ligand homodimerization in the regulation of ligand-receptor specificity.


  • Organizational Affiliation

    Department of Biochemistry & Molecular Pharmacology, New York University School of Medicine, New York, NY 10016, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fibroblast growth factor 9175Homo sapiensMutation(s): 3 
Gene Names: FGF9
UniProt & NIH Common Fund Data Resources
Find proteins for P31371 (Homo sapiens)
Explore P31371 
Go to UniProtKB:  P31371
PHAROS:  P31371
GTEx:  ENSG00000102678 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP31371
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Fibroblast growth factor receptor 1226Homo sapiensMutation(s): 0 
Gene Names: FGFR1BFGFRCEKFGFBRFLGFLT2HBGFR
EC: 2.7.10.1
UniProt & NIH Common Fund Data Resources
Find proteins for P11362 (Homo sapiens)
Explore P11362 
Go to UniProtKB:  P11362
PHAROS:  P11362
GTEx:  ENSG00000077782 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP11362
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.176 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.159α = 90
b = 86.793β = 90
c = 136.857γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)United StatesDE13686

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-09-13
    Changes: Author supporting evidence
  • Version 1.2: 2017-09-20
    Changes: Database references
  • Version 1.3: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.4: 2023-10-04
    Changes: Data collection, Database references, Refinement description