3FVQ

Crystal structure of the nucleotide binding domain FbpC complexed with ATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.198 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Insights into how nucleotide-binding domains power ABC transport.

Newstead, S.Fowler, P.W.Bilton, P.Carpenter, E.P.Sadler, P.J.Campopiano, D.J.Sansom, M.S.Iwata, S.

(2009) Structure 17: 1213-1222

  • DOI: https://doi.org/10.1016/j.str.2009.07.009
  • Primary Citation of Related Structures:  
    3FVQ

  • PubMed Abstract: 

    The mechanism by which nucleotide-binding domains (NBDs) of ABC transporters power the transport of substrates across cell membranes is currently unclear. Here we report the crystal structure of an NBD, FbpC, from the Neisseria gonorrhoeae ferric iron uptake transporter with an unusual and substantial domain swap in the C-terminal regulatory domain. This entanglement suggests that FbpC is unable to open to the same extent as the homologous protein MalK. Using molecular dynamics we demonstrate that this is not the case: both NBDs open rapidly once ATP is removed. We conclude from this result that the closed structures of FbpC and MalK have higher free energies than their respective open states. This result has important implications for our understanding of the mechanism of power generation in ABC transporters, because the unwinding of this free energy ensures that the opening of these two NBDs is also powered.


  • Organizational Affiliation

    Division of Molecular Biosciences, Membrane Protein Crystallography Group, Imperial College London, London, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fe(3+) ions import ATP-binding protein fbpC
A, B
359Neisseria gonorrhoeae FA 1090Mutation(s): 0 
Gene Names: fbpCNGO0215
EC: 3.6.3.30
Membrane Entity: Yes 
UniProt
Find proteins for Q5FA19 (Neisseria gonorrhoeae (strain ATCC 700825 / FA 1090))
Explore Q5FA19 
Go to UniProtKB:  Q5FA19
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5FA19
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.861α = 90
b = 89.095β = 90
c = 149.014γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling
SOLVEphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2012-10-17
    Changes: Database references
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations