5DL6

Crystal structure of Acinetobacter baumannii OccAB2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Insights into Outer Membrane Permeability of Acinetobacter baumannii.

Zahn, M.Bhamidimarri, S.P.Basle, A.Winterhalter, M.van den Berg, B.

(2016) Structure 24: 221-231

  • DOI: 10.1016/j.str.2015.12.009
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacterial resistance against antibiotics is an increasing global health problem. In Gram-negative bacteria the low permeability of the outer membrane (OM) is a major factor contributing to resistance, making it important to understand channel-mediate ...

    Bacterial resistance against antibiotics is an increasing global health problem. In Gram-negative bacteria the low permeability of the outer membrane (OM) is a major factor contributing to resistance, making it important to understand channel-mediated small-molecule passage of the OM. Acinetobacter baumannii has five Occ (OM carboxylate channel) proteins, which collectively are of major importance for the entry of small molecules. To improve our understanding of the OM permeability of A. baumannii, we present here the X-ray crystal structures of four Occ proteins, renamed OccAB1 to OccAB4. In addition we have carried out a biochemical and biophysical characterization using electrophysiology and liposome swelling experiments, providing information on substrate specificities. We identify OccAB1 as having the largest pore of the Occ proteins with corresponding high rates of small-molecule uptake, and we suggest that the future design of efficient antibiotics should focus on scaffolds that can permeate efficiently through the OccAB1 channel.


    Organizational Affiliation

    Institute for Cellular and Molecular Biosciences, Medical School, Newcastle University, Newcastle upon Tyne NE2 4HH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative porin for vanillate trafficking (VanP)
A
413Acinetobacter baumanniiMutation(s): 0 
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Outer Membrane Carboxylate Channels (Occ)
Protein: 
OccAB2 outer membrane channel
Find proteins for A0A0E4HLL9 (Acinetobacter baumannii)
Go to UniProtKB:  A0A0E4HLL9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.237 
  • Space Group: P 6 2 2
Unit Cell:
Length (Å)Angle (°)
a = 150.169α = 90.00
b = 150.169β = 90.00
c = 105.224γ = 120.00
Software Package:
Software NamePurpose
Aimlessdata scaling
XDSdata reduction
REFMACrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-02-03
    Type: Initial release
  • Version 1.1: 2016-02-10
    Type: Database references