6PNX

Crystal Structure of an Asymmetric Dimer of FGF Receptor 3 Kinases Trapped in A-loop Tyrosine Transphosphorylation Reaction

  • Classification: TRANSFERASE
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli BL21(DE3)
  • Mutation(s): Yes 

  • Deposited: 2019-07-03 Released: 2020-01-22 
  • Deposition Author(s): Mohammadi, M.
  • Funding Organization(s): National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report

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This is version 1.3 of the entry. See complete history


Literature

Molecular basis for receptor tyrosine kinase A-loop tyrosine transphosphorylation.

Chen, L.Marsiglia, W.M.Chen, H.Katigbak, J.Erdjument-Bromage, H.Kemble, D.J.Fu, L.Ma, J.Sun, G.Zhang, Y.Liang, G.Neubert, T.A.Li, X.Traaseth, N.J.Mohammadi, M.

(2020) Nat Chem Biol 16: 267-277

  • DOI: https://doi.org/10.1038/s41589-019-0455-7
  • Primary Citation of Related Structures:  
    6PNX

  • PubMed Abstract: 

    A long-standing mystery shrouds the mechanism by which catalytically repressed receptor tyrosine kinase domains accomplish transphosphorylation of activation loop (A-loop) tyrosines. Here we show that this reaction proceeds via an asymmetric complex that is thermodynamically disadvantaged because of an electrostatic repulsion between enzyme and substrate kinases. Under physiological conditions, the energetic gain resulting from ligand-induced dimerization of extracellular domains overcomes this opposing clash, stabilizing the A-loop-transphosphorylating dimer. A unique pathogenic fibroblast growth factor receptor gain-of-function mutation promotes formation of the complex responsible for phosphorylation of A-loop tyrosines by eliminating this repulsive force. We show that asymmetric complex formation induces a more phosphorylatable A-loop conformation in the substrate kinase, which in turn promotes the active state of the enzyme kinase. This explains how quantitative differences in the stability of ligand-induced extracellular dimerization promotes formation of the intracellular A-loop-transphosphorylating asymmetric complex to varying extents, thereby modulating intracellular kinase activity and signaling intensity.


  • Organizational Affiliation

    Department of Cell Biology and Skirball Institute of Biomolecular Medicine, New York University School of Medicine, New York, NY, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fibroblast growth factor receptor 3
A, B
324Homo sapiensMutation(s): 3 
Gene Names: FGFR3JTK4
EC: 2.7.10.1
UniProt & NIH Common Fund Data Resources
Find proteins for P22607 (Homo sapiens)
Explore P22607 
Go to UniProtKB:  P22607
PHAROS:  P22607
GTEx:  ENSG00000068078 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP22607
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.686α = 90
b = 93.253β = 103.06
c = 75.49γ = 90
Software Package:
Software NamePurpose
XDSdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
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 StatesR01 DE13686

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-22
    Type: Initial release
  • Version 1.1: 2020-02-05
    Changes: Database references
  • Version 1.2: 2020-03-04
    Changes: Database references
  • Version 1.3: 2023-10-11
    Changes: Data collection, Database references, Refinement description