3PGU

Phe3Glu mutant of EcFadL

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report


This is version 1.2 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 U S A 108: 10121-10126

  • DOI: 10.1073/pnas.1018532108
  • Primary Citation of Related Structures:  
    2R89, 2R8A, 3PF1, 3PGR, 3PGS, 3PGU

  • 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 organisms. Despite their widespread nature, no ligand-gated channels have yet been found within the outer membrane (OM) of Gram-negative bacteria ...

    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.

    Organizational Affiliation: 

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



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Long-chain fatty acid transport protein A427Escherichia coli K-12Mutation(s): 1 
Gene Names: b2344, fadL, JW2341, ttr
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL		Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric		Protein: 
FadL long-chain fatty acid transporter D348R mutant
Find proteins for P10384 (Escherichia coli (strain K12))
Explore P10384 
Go to UniProtKB:  P10384
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2PE
Query on 2PE
Download Ideal Coordinates CCD File 
A
NONAETHYLENE GLYCOL
C18 H38 O10
YZUUTMGDONTGTN-UHFFFAOYSA-N		 Ligand Interaction
C8E
Query on C8E
Download Ideal Coordinates CCD File 
A
(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE
C16 H34 O5
FEOZZFHAVXYAMB-UHFFFAOYSA-N		 Ligand Interaction
OLA
Query on OLA
Download Ideal Coordinates CCD File 
A
OLEIC ACID
C18 H34 O2
ZQPPMHVWECSIRJ-KTKRTIGZSA-N		 Ligand Interaction
NI
Query on NI
Download Ideal Coordinates CCD File 
A
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N		 Ligand Interaction
NA
Query on NA
Download Ideal Coordinates CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
OLAKd :  200   nM  PDBBind
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.2α = 90
b = 65.2β = 90
c = 280.28γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-05-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2015-01-07
    Changes: Structure summary