1T1L | pdb_00001t1l

Crystal structure of the long-chain fatty acid transporter FadL

• PDB DOI: https://doi.org/10.2210/pdb1T1L/pdb

• Classification: LIPID TRANSPORT
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  PDBTMMemProtMDmpstruc


• Deposited: 2004-04-16 Released: 2004-06-15 
• Deposition Author(s): van den Berg, B., Black, P.N., Clemons Jr., W.M., Rapoport, T.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 
  0.331 (Depositor), 0.329 (DCC) 
• R-Value Work: 
  0.298 (Depositor), 0.298 (DCC) 
• R-Value Observed: 
  0.306 (Depositor) 

Literature

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: 1506-1509

• PubMed: 15178802 
• DOI: https://doi.org/10.1126/science.1097524
• Primary Citation Related Structures: 
  1T16, 1T1L


• PubMed Abstract: 
  

  The mechanisms by which hydrophobic molecules, such as long-chain fatty acids, enter cells are poorly understood. In Gram-negative bacteria, the lipopolysaccharide layer in the outer membrane is an efficient barrier for fatty acids and aromatic hydrocarbons destined for biodegradation. We report crystal structures of the long-chain fatty acid transporter FadL from Escherichia coli at 2.6 and 2.8 angstrom resolution. FadL forms a 14-stranded beta barrel that is occluded by a central hatch domain. The structures suggest that hydrophobic compounds bind to multiple sites in FadL and use a transport mechanism that involves spontaneous conformational changes in the hatch.

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Organizational Affiliation: 
• Howard Hughes Medical Institute and Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 93.99 kDa 
• Atom Count: 6,642 
• Modeled Residue Count: 842 
• Deposited Residue Count: 854 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Long-chain fatty acid transport protein	A, B	427	Escherichia coli	Mutation(s): 0  Gene Names: FADL, TTR, B2344 Membrane Entity: Yes
UniProt
Find proteins for P10384 (Escherichia coli (strain K12)) Explore P10384  Go to UniProtKB:  P10384

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
LDA	C [auth A], D [auth B]	LAURYL DIMETHYLAMINE-N-OXIDE C14 H31 N O SYELZBGXAIXKHU-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free:  0.331 (Depositor), 0.329 (DCC) 
• R-Value Work:  0.298 (Depositor), 0.298 (DCC) 
• R-Value Observed: 0.306 (Depositor) 

Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 122.02	α = 90
b = 122.02	β = 90
c = 164.736	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-06-15 
Deposition Author(s): van den Berg, B., Black, P.N., Clemons Jr., W.M., Rapoport, T.A.

Revision History  

• Version 1.0: 2004-06-15
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations