Outer membrane protein OmpW

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.292 
  • R-Value Observed: 0.293 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


The outer membrane protein OmpW forms an eight-stranded beta-barrel with a hydrophobic channel.

Hong, H.Patel, D.R.Tamm, L.K.van den Berg, B.

(2006) J Biol Chem 281: 7568-7577

  • DOI: https://doi.org/10.1074/jbc.M512365200
  • Primary Citation of Related Structures:  
    2F1T, 2F1V

  • PubMed Abstract: 

    Escherichia coli OmpW belongs to a family of small outer membrane proteins that are widespread in Gram-negative bacteria. Their functions are unknown, but recent data suggest that they may be involved in the protection of bacteria against various forms of environmental stress. To gain insight into the function of these proteins A we have determined the crystal structure of E. coli OmpW to 2.7-A resolution. The structure shows that OmpW forms an 8-stranded beta-barrel with a long and narrow hydrophobic channel that contains a bound n-dodecyl-N,N-dimethylamine-N-oxide detergent molecule. Single channel conductance experiments show that OmpW functions as an ion channel in planar lipid bilayers. The channel activity can be blocked by the addition of n-dodecyl-N,N-dimethylamine-N-oxide. Taken together, the data suggest that members of the OmpW family could be involved in the transport of small hydrophobic molecules across the bacterial outer membrane.

  • Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein W
A, B, C, D, E
A, B, C, D, E, F
197Escherichia coli K-12Mutation(s): 0 
Gene Names: ompW
Membrane Entity: Yes 
Find proteins for P0A915 (Escherichia coli (strain K12))
Explore P0A915 
Go to UniProtKB:  P0A915
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A915
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.292 
  • R-Value Observed: 0.293 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 118.666α = 90
b = 118.776β = 90
c = 118.519γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-01-24
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2023-08-23
    Changes: Data collection, Database references, Derived calculations, Refinement description