3A3T

The oxidoreductase NmDsbA1 from N. meningitidis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure and function of the oxidoreductase DsbA1 from Neisseria meningitidis

Vivian, J.P.Scoullar, J.Rimmer, K.Bushell, S.R.Beddoe, T.Wilce, M.C.J.Byres, E.Boyle, T.P.Doak, B.Simpson, J.S.Graham, B.Heras, B.Kahler, C.M.Rossjohn, J.Scanlon, M.J.

(2009) J Mol Biol 394: 931-943

  • DOI: 10.1016/j.jmb.2009.09.065
  • Primary Citation of Related Structures:  
    3A3T

  • PubMed Abstract: 
  • Neisseria meningitidis encodes three DsbA oxidoreductases (NmDsbA1-NmDsbA3) that are vital for the oxidative folding of many membrane and secreted proteins, and these three enzymes are considered to exhibit different substrate specificities. This has ...

    Neisseria meningitidis encodes three DsbA oxidoreductases (NmDsbA1-NmDsbA3) that are vital for the oxidative folding of many membrane and secreted proteins, and these three enzymes are considered to exhibit different substrate specificities. This has led to the suggestion that each N. meningitidis DsbA (NmDsbA) may play a specialized role in different stages of pathogenesis; however, the molecular and structural bases of the different roles of NmDsbAs are unclear. With the aim of determining the molecular basis for substrate specificity and how this correlates to pathogenesis, we undertook a biochemical and structural characterization of the three NmDsbAs. We report the 2.0-A-resolution crystal structure of the oxidized form of NmDsbA1, which adopted a canonical DsbA fold similar to that observed in the structures of NmDsbA3 and Escherichia coli DsbA (EcDsbA). Structural comparisons revealed variations around the active site and candidate peptide-binding region. Additionally, we demonstrate that all three NmDsbAs are strong oxidases with similar redox potentials; however, they differ from EcDsbA in their ability to be reoxidized by E. coli DsbB. Collectively, our studies suggest that the small structural differences between the NmDsbA enzymes and EcDsbA are functionally significant and are the likely determinants of substrate specificity.


    Organizational Affiliation

    The Protein Crystallography Unit, Australian Research Council Center of Excellence in Structural and Functional Microbial Genomics, Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thiol:disulfide interchange protein DsbAABCDEF210Neisseria meningitidis serogroup BMutation(s): 0 
Gene Names: dsbA-1
EC: 5.3.4.1
Find proteins for Q9K189 (Neisseria meningitidis serogroup B (strain MC58))
Explore Q9K189 
Go to UniProtKB:  Q9K189
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.208α = 90
b = 59.301β = 108.92
c = 126.522γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
CrystalCleardata collection
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2013-11-20
    Changes: Database references