2JSY

Solution structure of Tpx in the oxidized state


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Reversible conformational switch revealed by the redox structures of Bacillus subtilis thiol peroxidase

Lu, J.Yang, F.Li, Y.Zhang, X.Xia, B.Jin, C.

(2008) Biochem.Biophys.Res.Commun. 373: 414-418

  • DOI: 10.1016/j.bbrc.2008.06.051
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacterial thiol peroxidase (Tpx) is the periplasmic antioxidant enzyme widely distributed in most bacterial species, which catalyzes the reduction of lipid hydroperoxide in vivo. Tpx belongs to the atypical 2-Cys peroxiredoxin (Prx) family and utiliz ...

    Bacterial thiol peroxidase (Tpx) is the periplasmic antioxidant enzyme widely distributed in most bacterial species, which catalyzes the reduction of lipid hydroperoxide in vivo. Tpx belongs to the atypical 2-Cys peroxiredoxin (Prx) family and utilizes two active cysteine residues during the redox reaction. Although several crystal structures of Tpx are available, no pair of the redox structures reported thus far. Therefore, the conformational changes coupled to the catalytic reaction remain unclear. Herein, we report the solution structures of Bacillus subtilis Tpx in both the reduced and oxidized forms, the first pair of Tpx structures. The overall structures of both forms are very similar, however, significant differences at the active regions around the C(P) and C(R) residues were observed. In particular, a helix-to-coil transition was observed at the C(R) region between the two forms. Our study reveals a dynamic picture of the conformational switch coupled to the redox reaction, thus provides further insights in understanding the catalytic mechanism of bacterial Tpx.


    Organizational Affiliation

    Beijing Nuclear Magnetic Resonance Center, Peking University, Beijing 100871, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable thiol peroxidase
A
167Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: tpx (ytgI)
EC: 1.11.1.15
Find proteins for P80864 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P80864
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2JSY Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2007-07-17 
  • Released Date: 2008-07-22 
  • Deposition Author(s): Jin, C., Lu, J.

Revision History 

  • Version 1.0: 2008-07-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance