Solid-state NMR Structure of outer membrane protein G in lipid bilayers

Experimental Data Snapshot

  • Conformers Calculated: 200 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

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Structure of outer membrane protein G in lipid bilayers.

Retel, J.S.Nieuwkoop, A.J.Hiller, M.Higman, V.A.Barbet-Massin, E.Stanek, J.Andreas, L.B.Franks, W.T.van Rossum, B.J.Vinothkumar, K.R.Handel, L.de Palma, G.G.Bardiaux, B.Pintacuda, G.Emsley, L.Kuhlbrandt, W.Oschkinat, H.

(2017) Nat Commun 8: 2073-2073

  • DOI: https://doi.org/10.1038/s41467-017-02228-2
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    β-barrel proteins mediate nutrient uptake in bacteria and serve vital functions in cell signaling and adhesion. For the 14-strand outer membrane protein G of Escherichia coli, opening and closing is pH-dependent. Different roles of the extracellular loops in this process were proposed, and X-ray and solution NMR studies were divergent. Here, we report the structure of outer membrane protein G investigated in bilayers of E. coli lipid extracts by magic-angle-spinning NMR. In total, 1847 inter-residue 1 H- 1 H and 13 C- 13 C distance restraints, 256 torsion angles, but no hydrogen bond restraints are used to calculate the structure. The length of β-strands is found to vary beyond the membrane boundary, with strands 6-8 being the longest and the extracellular loops 3 and 4 well ordered. The site of barrel closure at strands 1 and 14 is more disordered than most remaining strands, with the flexibility decreasing toward loops 3 and 4. Loop 4 presents a well-defined helix.

  • Organizational Affiliation

    Leibniz-Institut für Molekulare Pharmakologie, Robert-Rössle-Strasse 10, 13125, Berlin, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein G281Escherichia coli K-12Mutation(s): 0 
Gene Names: ompGb1319JW1312
Membrane Entity: Yes 
Find proteins for P76045 (Escherichia coli (strain K12))
Explore P76045 
Go to UniProtKB:  P76045
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP76045
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Conformers Calculated: 200 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European UnionGermanyBioNMR / 261863
European UnioniNext / GA 653706
German Research FoundationGermanySFB 740
German Research FoundationGermanyOS106/9

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-27
    Type: Initial release
  • Version 1.1: 2019-08-21
    Changes: Data collection
  • Version 1.2: 2024-05-15
    Changes: Data collection, Database references