2JMM

NMR solution structure of a minimal transmembrane beta-barrel platform protein

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 160 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.3 of the entry. See complete history. 


Literature

A minimal transmembrane beta-barrel platform protein studied by nuclear magnetic resonance

Johansson, M.U., Alioth, S., Hu, K., Walser, R., Koebnik, R., Pervushin, K.

(2007) Biochemistry 46: 1128-1140

  • DOI: 10.1021/bi061265e
  • Primary Citation of Related Structures:  
    2JMM

  • PubMed Abstract: 

    • In this study, we were concerned with the structural role of the surface-exposed extracellular loops of the N-terminal transmembrane (TM) domain of OmpA. A variant of the TM domain of outer membrane protein A (OmpA) with all four such loops shortened, which we call the beta-barrel platform (BBP), was successfully refolded ...

    In this study, we were concerned with the structural role of the surface-exposed extracellular loops of the N-terminal transmembrane (TM) domain of OmpA. A variant of the TM domain of outer membrane protein A (OmpA) with all four such loops shortened, which we call the beta-barrel platform (BBP), was successfully refolded. This indicates that the removed parts of the surface-exposed loops indeed do not contain amino acid sequences critical for this membrane protein's refolding in vitro. BBP has the potential to be used as a template beta-barrel membrane protein structure for the development of novel functions, although our results also highlight the potential difficulties that can arise when functionality is being engineered into the loop regions of membrane proteins. We have used solution nuclear magnetic resonance spectroscopy to determine the global fold of BBP+EF, BBP with a metal ion-binding EF-hand inserted in one of the shortened loops. BBP and BBP+EF in dihexanoylphosphatidylcholine micelles are eight-stranded antiparallel beta-barrels, and BBP represents the smallest beta-structured integral membrane protein known to date.

    Organizational Affiliation: 

    Laboratorium für Physikalische Chemie, ETH Hönggerberg, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland. maria.johansson@nmr.gu.se



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein AA156Escherichia coliMutation(s): 0 
Gene Names: ompA, con, tolG, tut
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL		Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric		Protein: 
OmpA with four shortened loops
Find proteins for P0A910 (Escherichia coli (strain K12))
Explore P0A910 
Go to UniProtKB:  P0A910
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 160 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2JMM Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-07-03
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-02-05
    Changes: Data collection, Database references, Derived calculations, Experimental preparation, Other