3FVQ

Crystal structure of the nucleotide binding domain FbpC complexed with ATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1016/j.str.2009.07.009

  • 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 iro ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fe(3+) ions import ATP-binding protein fbpC
A, B
359Neisseria gonorrhoeae (strain ATCC 700825 / FA 1090)Mutation(s): 0 
Gene Names: fbpC
EC: 3.6.3.30
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
FbpC ferric iron-uptake transporter nucleotide-binding domain
Find proteins for Q5FA19 (Neisseria gonorrhoeae (strain ATCC 700825 / FA 1090))
Go to UniProtKB:  Q5FA19
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A, B
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 55.861α = 90.00
b = 89.095β = 90.00
c = 149.014γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SOLVEphasing
SCALAdata scaling
ADSCdata collection
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-10-17
    Type: Database references