Crystal structure of reduced DsbA1 from Neisseria meningitidis

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.181 

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Biochemical and structural study of the homologues of the thiol-disulfide oxidoreductase DsbA in Neisseria meningitidis.

Lafaye, C.Iwema, T.Carpentier, P.Jullian-Binard, C.Kroll, J.S.Collet, J.F.Serre, L.

(2009) J Mol Biol 392: 952-966

  • DOI: https://doi.org/10.1016/j.jmb.2009.07.056
  • Primary Citation of Related Structures:  
    3DVW, 3DVX, 3HZ8

  • PubMed Abstract: 

    Bacterial virulence depends on the correct folding of surface-exposed proteins, a process catalyzed by the thiol-disulfide oxidoreductase DsbA, which facilitates the synthesis of disulfide bonds in Gram-negative bacteria. The Neisseria meningitidis genome possesses three genes encoding active DsbAs: DsbA1, DsbA2 and DsbA3. DsbA1 and DsbA2 have been characterized as lipoproteins involved in natural competence and in host interactive biology, while the function of DsbA3 remains unknown. This work reports the biochemical characterization of the three neisserial enzymes and the crystal structures of DsbA1 and DsbA3. As predicted by sequence homology, both enzymes adopt the classic Escherichia coli DsbA fold. The most striking feature shared by all three proteins is their exceptional oxidizing power. With a redox potential of -80 mV, the neisserial DsbAs are the most oxidizing thioredoxin-like enzymes known to date. Consistent with these findings, thermal studies indicate that their reduced form is also extremely stable. For each of these enzymes, this study shows that a threonine residue found within the active-site region plays a key role in dictating this extraordinary oxidizing power. This result highlights how residues located outside the CXXC motif may influence the redox potential of members of the thioredoxin family.

  • Organizational Affiliation

    Laboratoire des Protéines Membranaires, Institut de Biologie Structurale, CEA/CNRS/Université Joseph Fourier, 41 rue Jules Horowitz, 38027 Grenoble Cedex 01, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Thiol:disulfide interchange protein DsbA193Neisseria meningitidis MC58Mutation(s): 0 
Gene Names: dsbA-1NMB0278
Find proteins for Q9K189 (Neisseria meningitidis serogroup B (strain MC58))
Explore Q9K189 
Go to UniProtKB:  Q9K189
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9K189
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.08α = 90
b = 46.418β = 90
c = 79.93γ = 90
Software Package:
Software NamePurpose
XNEMOdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-08-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-02-21
    Changes: Data collection, Database references