Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 54.65 kDa 
• Atom Count: 4043 
• Residue Count: 452 
• Unique protein chains: 1

1HW1

THE FADR-DNA COMPLEX: TRANSCRIPTIONAL CONTROL OF FATTY ACID METABOLISM IN ESCHERICHIA COLI

• DOI: 10.2210/pdb1HW1/pdb

• Classification: TRANSCRIPTION
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2001-01-09 Released: 2001-01-24 
• Deposition Author(s): Xu, Y., Heath, R.J., Li, Z., Rock, C.O., White, S.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.216 
• R-Value Work: 0.198 

Literature

The FadR.DNA complex. Transcriptional control of fatty acid metabolism in Escherichia coli.

Xu, Y., Heath, R.J., Li, Z., Rock, C.O., White, S.W.

(2001) J Biol Chem 276: 17373-17379

• PubMed: 11279025 
• DOI: 10.1074/jbc.M100195200
• Primary Citation of Related Structures:  
  1HW2, 1HW1


• PubMed Abstract: 
  

In Escherichia coli, the expression of fatty acid metabolic genes is controlled by the transcription factor, FadR. The affinity of FadR for DNA is controlled by long chain acyl-CoA molecules, which bind to the protein and modulate gene expression. The crystal structure of FadR reveals a two domain dimeric molecule where the N-terminal domains bind DNA, and the C-terminal domains bind acyl-CoA. The DNA binding domain has a winged-helix motif, and the C-terminal domain resembles the sensor domain of the Tet repressor. The FadR.DNA complex reveals how the protein interacts with DNA and specifically recognizes a palindromic sequence. Structural and functional similarities to the Tet repressor and the BmrR transcription factors suggest how the binding of the acyl-CoA effector molecule to the C-terminal domain may affect the DNA binding affinity of the N-terminal domain. We suggest that the binding of acyl-CoA disrupts a buried network of charged and polar residues in the C-terminal domain, and the resulting conformational change is transmitted to the N-terminal domain via a domain-spanning alpha-helix.

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Organizational Affiliation: 

Department of Structural Biology, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FATTY ACID METABOLISM REGULATOR PROTEIN	A, B	239	Escherichia coli	Mutation(s): 0  Gene Names: fadR
Find proteins for P0A8V6 (Escherichia coli (strain K12)) Explore P0A8V6  Go to UniProtKB:  P0A8V6

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A, B	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 0.216 
• R-Value Work: 0.198 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.346	α = 90
b = 86.996	β = 120.18
c = 59.128	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-01-09 
• Released Date: 2001-01-24 
Deposition Author(s): Xu, Y., Heath, R.J., Li, Z., Rock, C.O., White, S.W.

Revision History 

• Version 1.0: 2001-01-24
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance