Crystal structure of the outer membrane porin OmpW from Klebsiella pneumoniae

Experimental Data Snapshot

  • Resolution: 3.20 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.269 

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Structure of the outer membrane porin OmpW from the pervasive pathogen Klebsiella pneumoniae.

Seddon, C.Frankel, G.Beis, K.

(2024) Acta Crystallogr F Struct Biol Commun 80: 22-27

  • DOI: https://doi.org/10.1107/S2053230X23010579
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Conjugation is the process by which plasmids, including those that carry antibiotic-resistance genes, are mobilized from one bacterium (the donor) to another (the recipient). The conjugation efficiency of IncF-like plasmids relies on the formation of mating-pair stabilization via intimate interactions between outer membrane proteins on the donor (a plasmid-encoded TraN isoform) and recipient bacteria. Conjugation of the R100-1 plasmid into Escherichia coli and Klebsiella pneumoniae (KP) recipients relies on pairing between the plasmid-encoded TraNα in the donor and OmpW in the recipient. Here, the crystal structure of K. pneumoniae OmpW (OmpW KP ) is reported at 3.2 Å resolution. OmpW KP forms an eight-stranded β-barrel flanked by extracellular loops. The structures of E. coli OmpW (OmpW EC ) and OmpW KP show high conservation despite sequence variability in the extracellular loops.

  • Organizational Affiliation

    Department of Life Sciences, Imperial College, London, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
OmpW protein190Klebsiella pneumoniaeMutation(s): 0 
Gene Names: ompWBN49_2384KPZU09_20550
Membrane Entity: Yes 
Find proteins for A0A378H1N5 (Klebsiella pneumoniae)
Explore A0A378H1N5 
Go to UniProtKB:  A0A378H1N5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A378H1N5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.20 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.267 
  • R-Value Observed: 0.269 
  • Space Group: C 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.928α = 90
b = 138.636β = 90
c = 52.968γ = 90
Software Package:
Software NamePurpose
DIALSdata reduction
Aimlessdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research Council (BBSRC)United Kingdom--

Revision History  (Full details and data files)

  • Version 1.0: 2024-01-24
    Type: Initial release