4YX9

Crystal structure of the CFTR inhibitory factor Cif bound to tiratricol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Inhibiting an Epoxide Hydrolase Virulence Factor from Pseudomonas aeruginosa Protects CFTR.

Bahl, C.D.Hvorecny, K.L.Bomberger, J.M.Stanton, B.A.Hammock, B.D.Morisseau, C.Madden, D.R.

(2015) Angew.Chem.Int.Ed.Engl. 54: 9881-9885

  • DOI: 10.1002/anie.201503983
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Opportunistic pathogens exploit diverse strategies to sabotage host defenses. Pseudomonas aeruginosa secretes the CFTR inhibitory factor Cif and thus triggers loss of CFTR, an ion channel required for airway mucociliary defense. However, the mechanis ...

    Opportunistic pathogens exploit diverse strategies to sabotage host defenses. Pseudomonas aeruginosa secretes the CFTR inhibitory factor Cif and thus triggers loss of CFTR, an ion channel required for airway mucociliary defense. However, the mechanism of action of Cif has remained unclear. It catalyzes epoxide hydrolysis, but there is no known role for natural epoxides in CFTR regulation. It was demonstrated that the hydrolase activity of Cif is strictly required for its effects on CFTR. A small-molecule inhibitor that protects this key component of the mucociliary defense system was also uncovered. These results provide a basis for targeting the distinctive virulence chemistry of Cif and suggest an unanticipated role of physiological epoxides in intracellular protein trafficking.


    Organizational Affiliation

    Department of Microbiology & Immunology, Geisel School of Medicine at Dartmouth, 7560 Vail Building, Hanover, NH 03755 (USA).,Department of Biochemistry, Geisel School of Medicine at Dartmouth, 7200 Vail Building, Hanover, NH 03755 (USA) http://www.dartmouth.edu/∼madden. drm0001@dartmouth.edu.,Department of Entomology and Nematology, UCD Comprehensive Cancer Center, University of California at Davis, One Shields Ave., Davis, CA 95616 (USA).,Department of Biochemistry, Geisel School of Medicine at Dartmouth, 7200 Vail Building, Hanover, NH 03755 (USA) http://www.dartmouth.edu/∼madden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CFTR inhibitory factor
A, B, C, D
301Pseudomonas aeruginosa (strain UCBPP-PA14)Mutation(s): 0 
Find proteins for A0A0M3KL26 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Go to UniProtKB:  A0A0M3KL26
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
4HY
Query on 4HY

Download SDF File 
Download CCD File 
A, B, C, D
[4-(4-HYDROXY-3-IODO-PHENOXY)-3,5-DIIODO-PHENYL]-ACETIC ACID
C14 H9 I3 O4
UOWZUVNAGUAEQC-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
4HYKi: 4500 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.164 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 169.628α = 90.00
b = 84.016β = 100.48
c = 89.522γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PHENIXrefinement
XSCALEdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesR01-AI091699
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesT32-AI007519
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney DiseaseUnited StatesT32-DK007301
Cystic Fibrosis FoundationUnited StatesMADDEN08G0

Revision History 

  • Version 1.0: 2015-07-15
    Type: Initial release
  • Version 1.1: 2015-08-26
    Type: Other
  • Version 1.2: 2017-09-13
    Type: Author supporting evidence, Derived calculations