3HBW

Crystal Structure of Human Fibroblast Growth Factor Homologous Factor 2A (FHF2A), also referred to as Fibroblast Growth Factor 13A (FGF13A)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.219 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal structure of a fibroblast growth factor homologous factor (FHF) defines a conserved surface on FHFs for binding and modulation of voltage-gated sodium channels.

Goetz, R.Dover, K.Laezza, F.Shtraizent, N.Huang, X.Tchetchik, D.Eliseenkova, A.V.Xu, C.F.Neubert, T.A.Ornitz, D.M.Goldfarb, M.Mohammadi, M.

(2009) J Biol Chem 284: 17883-17896

  • DOI: 10.1074/jbc.M109.001842
  • Primary Citation of Related Structures:  
    3HBW

  • PubMed Abstract: 
  • Voltage-gated sodium channels (Nav) produce sodium currents that underlie the initiation and propagation of action potentials in nerve and muscle cells. Fibroblast growth factor homologous factors (FHFs) bind to the intracellular C-terminal region of the Nav alpha subunit to modulate fast inactivation of the channel ...

    Voltage-gated sodium channels (Nav) produce sodium currents that underlie the initiation and propagation of action potentials in nerve and muscle cells. Fibroblast growth factor homologous factors (FHFs) bind to the intracellular C-terminal region of the Nav alpha subunit to modulate fast inactivation of the channel. In this study we solved the crystal structure of a 149-residue-long fragment of human FHF2A which unveils the structural features of the homology core domain of all 10 human FHF isoforms. Through analysis of crystal packing contacts and site-directed mutagenesis experiments we identified a conserved surface on the FHF core domain that mediates channel binding in vitro and in vivo. Mutations at this channel binding surface impaired the ability of FHFs to co-localize with Navs at the axon initial segment of hippocampal neurons. The mutations also disabled FHF modulation of voltage-dependent fast inactivation of sodium channels in neuronal cells. Based on our data, we propose that FHFs constitute auxiliary subunits for Navs.


    Organizational Affiliation

    Department of Pharmacology, Skirball Institute of Biomolecular Medicine, New York University School of Medicine, New York, NY 10016, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fibroblast growth factor 13A, B193Homo sapiensMutation(s): 0 
Gene Names: FGF13FHF2fibroblast growth factor homologous factor 2 (FHF2)
UniProt & NIH Common Fund Data Resources
Find proteins for Q92913 (Homo sapiens)
Explore Q92913 
Go to UniProtKB:  Q92913
PHAROS:  Q92913
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.219 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.218α = 90
b = 57.998β = 93.79
c = 52.236γ = 90
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

  • Deposited Date: 2009-05-05 
  • Released Date: 2009-05-26 
  • Deposition Author(s): Mohammadi, M.

Revision History  (Full details and data files)

  • Version 1.0: 2009-05-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance