1H9G

FadR, FATTY ACID RESPONSIVE TRANSCRIPTION FACTOR FROM E. COLI, in complex with myristoyl-CoA

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.226 

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Literature

The Structural Basis of Acyl Coenzyme A-Dependent Regulation of the Transcription Factor Fadr

Van Aalten, D.M.F., Dirusso, C.C., Knudsen, J.

(2001) EMBO J 20: 2041

  • DOI: 10.1093/emboj/20.8.2041
  • Primary Citation of Related Structures:  
    1H9G, 1H9T

  • PubMed Abstract: 

    • FadR is an acyl-CoA-responsive transcription factor, regulating fatty acid biosynthetic and degradation genes in Escherichia coli. The apo-protein binds DNA as a homodimer, an interaction that is disrupted by binding of acyl-COA: The recently described structure of apo-FadR shows a DNA binding domain coupled to an acyl-CoA binding domain with a novel fold, but does not explain how binding of the acyl-CoA effector molecule > 30 A away from the DNA binding site affects transcriptional regulation ...

    FadR is an acyl-CoA-responsive transcription factor, regulating fatty acid biosynthetic and degradation genes in Escherichia coli. The apo-protein binds DNA as a homodimer, an interaction that is disrupted by binding of acyl-COA: The recently described structure of apo-FadR shows a DNA binding domain coupled to an acyl-CoA binding domain with a novel fold, but does not explain how binding of the acyl-CoA effector molecule > 30 A away from the DNA binding site affects transcriptional regulation. Here, we describe the structures of the FadR-operator and FadR- myristoyl-CoA binary complexes. The FadR-DNA complex reveals a novel winged helix-turn-helix protein-DNA interaction, involving sequence-specific contacts from the wing to the minor groove. Binding of acyl-CoA results in dramatic conformational changes throughout the protein, with backbone shifts up to 4.5 A. The net effect is a rearrangement of the DNA binding domains in the dimer, resulting in a change of 7.2 A in separation of the DNA recognition helices and the loss of DNA binding, revealing the molecular basis of acyl-CoA-responsive regulation.

    Related Citations: 
    • Crystal Structure of Fadr, a Fatty Acid-Responsive Transcription Factor with a Novel Acyl Coenzyme A-Binding Fold
      Van Aalten, D.M., Dirusso, C.C., Knudsen, J., Wierenga, R.K.
      (2000) EMBO J 19: 5167
    • Crystallization and X-Ray Diffraction Studies of the Fatty-Acid Responsive Transcription Factor Fadr from Escherichia Coli
      Van Aalten, D.M.F., Knudsen, J., Dirusso, C.C., Kokko, T., Wierenga, R.K.
      (2000) Acta Crystallogr D Biol Crystallogr 56: 469
    Organizational Affiliation: 

    Wellcome Trust Biocentre, Division of Biological Chemistry and Molecular Microbiology, School of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, UK. dava@davapc1.bioch.dundee.ac.uk



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FATTY ACID METABOLISM REGULATOR PROTEINA243Escherichia coliMutation(s): 0 
UniProt
Find proteins for P0A8V6 (Escherichia coli (strain K12))
Explore P0A8V6 
Go to UniProtKB:  P0A8V6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A8V6
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
COA
Query on COA
Download Ideal Coordinates CCD File 
B [auth A]COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N		 Ligand Interaction
MYR
Query on MYR
Download Ideal Coordinates CCD File 
C [auth A]MYRISTIC ACID
C14 H28 O2
TUNFSRHWOTWDNC-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.226 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.476α = 90
b = 59.476β = 90
c = 290.483γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-03-09
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance