3HXS

Crystal Structure of Bacteroides fragilis TrxP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.996 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

In vivo oxidative protein folding can be facilitated by oxidation-reduction cycling

Shouldice, S.R.Cho, S.H.Boyd, D.Heras, B.Eser, M.Beckwith, J.Riggs, P.Martin, J.L.Berkmen, M.

(2010) Mol.Microbiol. 75: 13-28

  • DOI: 10.1111/j.1365-2958.2009.06952.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Current dogma dictates that bacterial proteins with misoxidized disulfide bonds are shuffled into correctly oxidized states by DsbC. There are two proposed mechanisms for DsbC activity. The first involves a DsbC-only model of substrate disulfide rear ...

    Current dogma dictates that bacterial proteins with misoxidized disulfide bonds are shuffled into correctly oxidized states by DsbC. There are two proposed mechanisms for DsbC activity. The first involves a DsbC-only model of substrate disulfide rearrangement. The second invokes cycles of reduction and oxidation of substrate disulfide bonds by DsbC and DsbA respectively. Here, we addressed whether the second mechanism is important in vivo by identifying whether a periplasmic reductase could complement DsbC. We screened for naturally occurring periplasmic reductases in Bacteroides fragilis, a bacterium chosen because we predicted it encodes reductases and has a reducing periplasm. We found that the B. fragilis periplasmic protein TrxP has a thioredoxin fold with an extended N-terminal region; that it is a very active reductase but a poor isomerase; and that it fully complements dsbC. These results provide direct in vivo evidence that correctly folded protein is achievable via cycles of oxidation and reduction.


    Organizational Affiliation

    Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld 4072, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thioredoxin
A, B
141Bacteroides fragilis (strain YCH46)Mutation(s): 0 
Find proteins for Q64SV7 (Bacteroides fragilis (strain YCH46))
Go to UniProtKB:  Q64SV7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.996 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.196 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 94.568α = 90.00
b = 94.568β = 90.00
c = 82.518γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
Blu-Icedata collection
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2009-06-22 
  • Released Date: 2010-01-12 
  • Deposition Author(s): Shouldice, S.R.

Revision History 

  • Version 1.0: 2010-01-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance