5TNM

Crystal structure of the E153Q mutant of the CFTR inhibitory factor Cif containing the adducted (R)-1,2-Epoxyoctane hydrolysis intermediate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.146 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Active-Site Flexibility and Substrate Specificity in a Bacterial Virulence Factor: Crystallographic Snapshots of an Epoxide Hydrolase.

Hvorecny, K.L.Bahl, C.D.Kitamura, S.Lee, K.S.S.Hammock, B.D.Morisseau, C.Madden, D.R.

(2017) Structure 25: 697-707.e4

  • DOI: 10.1016/j.str.2017.03.002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Pseudomonas aeruginosa secretes an epoxide hydrolase with catalytic activity that triggers degradation of the cystic fibrosis transmembrane conductance regulator (CFTR) and perturbs other host defense networks. Targets of this CFTR inhibitory factor ...

    Pseudomonas aeruginosa secretes an epoxide hydrolase with catalytic activity that triggers degradation of the cystic fibrosis transmembrane conductance regulator (CFTR) and perturbs other host defense networks. Targets of this CFTR inhibitory factor (Cif) are largely unknown, but include an epoxy-fatty acid. In this class of signaling molecules, chirality can be an important determinant of physiological output and potency. Here we explore the active-site chemistry of this two-step α/β-hydrolase and its implications for an emerging class of virulence enzymes. In combination with hydrolysis data, crystal structures of 15 trapped hydroxyalkyl-enzyme intermediates reveal the stereochemical basis of Cif's substrate specificity, as well as its regioisomeric and enantiomeric preferences. The structures also reveal distinct sets of conformational changes that enable the active site to expand dramatically in two directions, accommodating a surprising array of potential physiological epoxide targets. These new substrates may contribute to Cif's diverse effects in vivo, and thus to the success of P. aeruginosa and other pathogens during infection.


    Organizational Affiliation

    Department of Biochemistry and Cell Biology, Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, USA.




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
7F2
Query on 7F2

Download SDF File 
Download CCD File 
A, B, C, D
(2R)-octane-1,2-diol
C8 H18 O2
AEIJTFQOBWATKX-MRVPVSSYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.146 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 168.297α = 90.00
b = 84.043β = 100.39
c = 89.253γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
NIH, CFFUnited States--

Revision History 

  • Version 1.0: 2017-10-11
    Type: Initial release