Crystal structure of the CFTR inhibitory factor Cif with the E153D mutation

Experimental Data Snapshot

  • Resolution: 1.36 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 

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This is version 1.4 of the entry. See complete history


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: https://doi.org/10.1002/anie.201503983
  • Primary Citation of Related Structures:  
    4DLN, 4DM7, 4DMF, 4DMH, 4DMK, 4YX9

  • 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 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 Biochemistry, Geisel School of Medicine at Dartmouth, 7200 Vail Building, Hanover, NH 03755 (USA) http://www.dartmouth.edu/∼madden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative hydrolase
A, B, C, D
301Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 1 
Gene Names: PA14_26090
Find proteins for A0A0H2ZD27 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Explore A0A0H2ZD27 
Go to UniProtKB:  A0A0H2ZD27
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H2ZD27
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.36 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.212 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 168.353α = 90
b = 84.138β = 100.48
c = 89.166γ = 90
Software Package:
Software NamePurpose
PHENIXmodel building
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-08-07
    Type: Initial release
  • Version 1.1: 2015-07-15
    Changes: Database references
  • Version 1.2: 2015-08-26
    Changes: Database references
  • Version 1.3: 2017-11-15
    Changes: Advisory, Refinement description
  • Version 1.4: 2023-09-13
    Changes: Advisory, Data collection, Database references, Refinement description