4P9U

FadR, Fatty Acid Responsive Transcription Factor from Vibrio cholerae, in Complex with DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.21 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.219 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The 40-residue insertion in Vibrio cholerae FadR facilitates binding of an additional fatty acyl-CoA ligand.

Shi, W.Kovacikova, G.Lin, W.Taylor, R.K.Skorupski, K.Kull, F.J.

(2015) Nat Commun 6: 6032-6032

  • DOI: https://doi.org/10.1038/ncomms7032
  • Primary Citation of Related Structures:  
    4P96, 4P9U, 4PDK

  • PubMed Abstract: 

    FadR is a master regulator of fatty acid metabolism and influences virulence in certain members of Vibrionaceae. Among FadR homologues of the GntR family, the Vibrionaceae protein is unusual in that it contains a C-terminal 40-residue insertion. Here we report the structure of Vibrio cholerae FadR (VcFadR) alone, bound to DNA, and in the presence of a ligand, oleoyl-CoA. Whereas Escherichia coli FadR (EcFadR) contains only one acyl-CoA-binding site in each monomer, crystallographic and calorimetric data indicate that VcFadR has two. One of the binding sites resembles that of EcFadR, whereas the other, comprised residues from the insertion, has not previously been observed. Upon ligand binding, VcFadR undergoes a dramatic conformational change that would more fully disrupt DNA binding than EcFadR. These findings suggest that the ability to bind and respond to an additional ligand allows FadR from Vibrionaceae to function as a more efficient regulator.


  • Organizational Affiliation

    Department of Biochemistry, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire 03755, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fatty acid metabolism regulator proteinA [auth E],
B [auth F],
E [auth A],
F [auth B]
272Vibrio choleraeMutation(s): 0 
Gene Names: fadRVC_1900
UniProt
Find proteins for Q9KQU8 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Explore Q9KQU8 
Go to UniProtKB:  Q9KQU8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9KQU8
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (31-MER)C [auth G],
G [auth C]
31Vibrio cholerae
Sequence Annotations
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  • Reference Sequence
Find similar nucleic acids by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (31-MER)D [auth H],
H [auth D]
31Vibrio cholerae
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.21 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.219 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.6α = 89.8
b = 94.7β = 114.6
c = 101.7γ = 116.5
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
PHASERphasing
PHENIXrefinement

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI072661

Revision History  (Full details and data files)

  • Version 1.0: 2015-02-04
    Type: Initial release
  • Version 1.1: 2017-09-20
    Changes: Author supporting evidence, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary
  • Version 1.2: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Refinement description