4GCQ

Crystal Structure of E. coli OmpF porin in complex with Carbenicillin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Binding of Antibiotics in OmpF Porin.

Ziervogel, B.K.Roux, B.

(2013) Structure 21: 76-87

  • DOI: 10.1016/j.str.2012.10.014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The structure of OmpF porin in complex with three common antibiotics (zwitterionic ampicillin, anionic ertapenem, and di-anionic carbenicillin) was determined using X-ray crystallography. The three antibiotics are found to bind within the extracellul ...

    The structure of OmpF porin in complex with three common antibiotics (zwitterionic ampicillin, anionic ertapenem, and di-anionic carbenicillin) was determined using X-ray crystallography. The three antibiotics are found to bind within the extracellular and periplasmic pore vestibules, away from the narrow OmpF constriction zone. Using the X-ray structures as a starting point, nonequilibrium molecular dynamics simulations with an applied membrane voltage show that ionic current through the OmpF channel is blocked with bound ampicillin, but not with bound carbenicillin. The susceptibility of Escherichia coli expressing OmpF mutants to ampicillin and carbenicillin was also experimentally characterized using microbiologic assays. These results show that general diffusion by OmpF porins allows for transfer of molecules with varied charged states and give insights into the design of more efficient antibiotics. A better understanding of this mechanism will shed light on nature's way of devising channels able to enhance the transport of molecules through membranes.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Gordon Center for Integrative Science, The University of Chicago, 929 East 57(th) Street, Chicago, IL 60637, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein F
A, B
341Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: ompF (cmlB, coa, cry, tolF)
Find proteins for P02931 (Escherichia coli (strain K12))
Go to UniProtKB:  P02931
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0JM
Query on 0JM

Download SDF File 
Download CCD File 
A, B
(2S,5R,6R,7R)-6-{[(2R)-2-carboxy-2-phenylacetyl]amino}-7-hydroxy-3,3-dimethyl-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid
Carbenicillin
C17 H20 N2 O6 S
ASNJKAXIMWOZDG-KHQUWSPVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.219 
  • Space Group: P 3
Unit Cell:
Length (Å)Angle (°)
a = 116.710α = 90.00
b = 116.710β = 90.00
c = 53.890γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data collection
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-19
    Type: Initial release
  • Version 1.1: 2013-02-06
    Type: Database references