2R8A

Crystal structure of the long-chain fatty acid transporter FadL mutant delta N8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.248 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

From the Cover: Ligand-gated diffusion across the bacterial outer membrane.

Lepore, B.W.Indic, M.Pham, H.Hearn, E.M.Patel, D.R.van den Berg, B.

(2011) Proc.Natl.Acad.Sci.USA 108: 10121-10126

  • DOI: 10.1073/pnas.1018532108
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ligand-gated channels, in which a substrate transport pathway is formed as a result of the binding of a small-molecule chemical messenger, constitute a diverse class of membrane proteins with important functions in prokaryotic and eukaryotic organism ...

    Ligand-gated channels, in which a substrate transport pathway is formed as a result of the binding of a small-molecule chemical messenger, constitute a diverse class of membrane proteins with important functions in prokaryotic and eukaryotic organisms. Despite their widespread nature, no ligand-gated channels have yet been found within the outer membrane (OM) of Gram-negative bacteria. Here we show, using in vivo transport assays, intrinsic tryptophan fluorescence and X-ray crystallography, that high-affinity (submicromolar) substrate binding to the OM long-chain fatty acid transporter FadL from Escherichia coli causes conformational changes in the N terminus that open up a channel for substrate diffusion. The OM long-chain fatty acid transporter FadL from E. coli is a unique paradigm for OM diffusion-driven transport, in which ligand gating within a β-barrel membrane protein is a prerequisite for channel formation.


    Related Citations: 
    • Crystal structure of the long-chain fatty acid transporter FadL
      van den Berg, B.,Black, P.N.,Clemons Jr., W.M.,Rapoport, T.A.
      (2004) Science 304: 1506


    Organizational Affiliation

    University of Massachusetts Medical School, Program in Molecular Medicine, 373 Plantation Street, Worcester, MA 01605, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Long-chain fatty acid transport protein
A, B
419Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fadL (ttr)
Find proteins for P10384 (Escherichia coli (strain K12))
Go to UniProtKB:  P10384
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
C8E
Query on C8E

Download SDF File 
Download CCD File 
A, B
(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
C16 H34 O5
FEOZZFHAVXYAMB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.248 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 64.766α = 90.00
b = 64.766β = 90.00
c = 270.651γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHASERphasing
HKL-2000data reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-09-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance