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 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • 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 ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Outer membrane protein A
A
156Escherichia coli (strain K12)Gene Names: ompA (con, tolG, tut)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
OmpA
Find proteins for P0A910 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A910
Experimental Data & Validation

Experimental Data

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

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-07-03
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance