5JYC

Crystal structure of the E153Q mutant of the CFTR inhibitory factor Cif containing the adducted 14,15-EET hydrolysis intermediate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.153 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Pseudomonas aeruginosa sabotages the generation of host proresolving lipid mediators.

Flitter, B.A.Hvorecny, K.L.Ono, E.Eddens, T.Yang, J.Kwak, D.H.Bahl, C.D.Hampton, T.H.Morisseau, C.Hammock, B.D.Liu, X.Lee, J.S.Kolls, J.K.Levy, B.D.Madden, D.R.Bomberger, J.M.

(2017) Proc. Natl. Acad. Sci. U.S.A. 114: 136-141

  • DOI: 10.1073/pnas.1610242114

  • PubMed Abstract: 
  • Recurrent Pseudomonas aeruginosa infections coupled with robust, damaging neutrophilic inflammation characterize the chronic lung disease cystic fibrosis (CF). The proresolving lipid mediator, 15-epi lipoxin A4 (15-epi LXA4), plays a critical role in ...

    Recurrent Pseudomonas aeruginosa infections coupled with robust, damaging neutrophilic inflammation characterize the chronic lung disease cystic fibrosis (CF). The proresolving lipid mediator, 15-epi lipoxin A4 (15-epi LXA4), plays a critical role in limiting neutrophil activation and tissue inflammation, thus promoting the return to tissue homeostasis. Here, we show that a secreted P. aeruginosa epoxide hydrolase, cystic fibrosis transmembrane conductance regulator inhibitory factor (Cif), can disrupt 15-epi LXA4 transcellular biosynthesis and function. In the airway, 15-epi LXA4 production is stimulated by the epithelial-derived eicosanoid 14,15-epoxyeicosatrienoic acid (14,15-EET). Cif sabotages the production of 15-epi LXA4 by rapidly hydrolyzing 14,15-EET into its cognate diol, eliminating a proresolving signal that potently suppresses IL-8-driven neutrophil transepithelial migration in vitro. Retrospective analyses of samples from patients with CF supported the translational relevance of these preclinical findings. Elevated levels of Cif in bronchoalveolar lavage fluid were correlated with lower levels of 15-epi LXA4, increased IL-8 concentrations, and impaired lung function. Together, these findings provide structural, biochemical, and immunological evidence that the bacterial epoxide hydrolase Cif disrupts resolution pathways during bacterial lung infections. The data also suggest that Cif contributes to sustained pulmonary inflammation and associated loss of lung function in patients with CF.


    Organizational Affiliation

    Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA 15219.




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): 1 
Find proteins for A0A0H2ZD27 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Go to UniProtKB:  A0A0H2ZD27
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EET
Query on EET

Download SDF File 
Download CCD File 
A, B, C, D
(5~{Z},11~{Z},14~{R},15~{R})-14,15-bis(oxidanyl)icosa-5,8,11-trienoic acid
C20 H34 O4
SYAWGTIVOGUZMM-JHIAIUNDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.153 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 168.930α = 90.00
b = 83.602β = 100.38
c = 89.241γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXphasing
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of HealthUnited States--

Revision History 

  • Version 1.0: 2017-01-11
    Type: Initial release
  • Version 1.1: 2017-01-18
    Type: Database references