Solution NMR structure of DsbB-ubiquinone complex

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 195 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.3 of the entry. See complete history


NMR solution structure of the integral membrane enzyme DsbB: functional insights into DsbB-catalyzed disulfide bond formation.

Zhou, Y.Cierpicki, T.Jimenez, R.H.Lukasik, S.M.Ellena, J.F.Cafiso, D.S.Kadokura, H.Beckwith, J.Bushweller, J.H.

(2008) Mol Cell 31: 896-908

  • DOI: https://doi.org/10.1016/j.molcel.2008.08.028
  • Primary Citation of Related Structures:  
    2K73, 2K74

  • PubMed Abstract: 

    We describe the NMR structure of DsbB, a polytopic helical membrane protein. DsbB, a bacterial cytoplasmic membrane protein, plays a key role in disulfide bond formation. It reoxidizes DsbA, the periplasmic protein disulfide oxidant, using the oxidizing power of membrane-embedded quinones. We determined the structure of an interloop disulfide bond form of DsbB, an intermediate in catalysis. Analysis of the structure and interactions with substrates DsbA and quinone reveals functionally relevant changes induced by these substrates. Analysis of the structure, dynamics measurements, and NMR chemical shifts around the interloop disulfide bond suggest how electron movement from DsbA to quinone through DsbB is regulated and facilitated. Our results demonstrate the extraordinary utility of NMR for functional characterization of polytopic integral membrane proteins and provide insights into the mechanism of DsbB catalysis.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Disulfide bond formation protein B183Escherichia coli K-12Mutation(s): 4 
Gene Names: dsbBroxBycgAb1185JW5182
Membrane Entity: Yes 
Find proteins for P0A6M2 (Escherichia coli (strain K12))
Explore P0A6M2 
Go to UniProtKB:  P0A6M2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A6M2
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on UQ2

Download Ideal Coordinates CCD File 
C19 H26 O4
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 195 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-10-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.2: 2011-12-07
    Changes: Database references
  • Version 1.3: 2021-10-20
    Changes: Data collection, Database references, Derived calculations