3HZ8

Crystal structure of the oxidized T176V DsbA1 mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

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: 10.1016/j.jmb.2009.07.056
  • Primary Citation of Related Structures:  

  • 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 g ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thiol:disulfide interchange protein DsbA
A
193Neisseria meningitidis serogroup B (strain MC58)Mutation(s): 1 
Gene Names: dsbA-1
Find proteins for Q9K189 (Neisseria meningitidis serogroup B (strain MC58))
Go to UniProtKB:  Q9K189
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.307α = 90.00
b = 47.615β = 90.00
c = 79.820γ = 90.00
Software Package:
Software NamePurpose
REFMACphasing
MOSFLMdata reduction
REFMACrefinement
SCALAdata scaling
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance