3O7Q

Crystal structure of a Major Facilitator Superfamily (MFS) transporter, FucP, in the outward conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.143 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of a fucose transporter in an outward-open conformation

Dang, S.Y.Sun, L.F.Huang, Y.Lu, F.Liu, Y.Gong, H.Wang, J.Yan, N.

(2010) Nature 467: 734-738

  • DOI: 10.1038/nature09406
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The major facilitator superfamily (MFS) transporters are an ancient and widespread family of secondary active transporters. In Escherichia coli, the uptake of l-fucose, a source of carbon for microorganisms, is mediated by an MFS proton symporter, Fu ...

    The major facilitator superfamily (MFS) transporters are an ancient and widespread family of secondary active transporters. In Escherichia coli, the uptake of l-fucose, a source of carbon for microorganisms, is mediated by an MFS proton symporter, FucP. Despite intensive study of the MFS transporters, atomic structure information is only available on three proteins and the outward-open conformation has yet to be captured. Here we report the crystal structure of FucP at 3.1 Å resolution, which shows that it contains an outward-open, amphipathic cavity. The similarly folded amino and carboxyl domains of FucP have contrasting surface features along the transport path, with negative electrostatic potential on the N domain and hydrophobic surface on the C domain. FucP only contains two acidic residues along the transport path, Asp 46 and Glu 135, which can undergo cycles of protonation and deprotonation. Their essential role in active transport is supported by both in vivo and in vitro experiments. Structure-based biochemical analyses provide insights into energy coupling, substrate recognition and the transport mechanism of FucP.


    Organizational Affiliation

    State Key Laboratory of Bio-membrane and Membrane Biotechnology, Center for Structural Biology, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-fucose-proton symporter
A
438Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fucP
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Major Facilitator Superfamily (MFS) Transporters
Protein: 
FucP Fucose Transporter in outward-facing conformation
Find proteins for P11551 (Escherichia coli (strain K12))
Go to UniProtKB:  P11551
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BNG
Query on BNG

Download SDF File 
Download CCD File 
A
B-NONYLGLUCOSIDE
C15 H30 O6
QFAPUKLCALRPLH-UXXRCYHCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.143 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.215 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 119.460α = 90.00
b = 119.460β = 90.00
c = 98.360γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
BSSdata collection
PHENIXrefinement
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2014-03-26
    Type: Database references