3ZVJ

Crystal structure of high molecular weight (HMW) form of Peroxiredoxin I from Schistosoma mansoni


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.233 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Moonlighting by Different Stressors: Crystal Structure of the Chaperone Species of a 2-Cys Peroxiredoxin.

Saccoccia, F.Di Micco, P.Boumis, G.Brunori, M.Koutris, I.Miele, A.E.Morea, V.Sriratana, P.Williams, D.L.Bellelli, A.Angelucci, F.

(2012) Structure 20: 429

  • DOI: 10.1016/j.str.2012.01.004
  • Primary Citation of Related Structures:  
    3ZTL, 3ZVJ

  • PubMed Abstract: 
  • 2-Cys peroxiredoxins (Prxs) play two different roles depending on the physiological status of the cell. They are thioredoxin-dependent peroxidases under low oxidative stress and ATP-independent chaperones upon exposure to high peroxide concentrations. These alternative functions have been associated with changes in the oligomerization state from low-(LMW) to high-molecular-weight (HMW) species ...

    2-Cys peroxiredoxins (Prxs) play two different roles depending on the physiological status of the cell. They are thioredoxin-dependent peroxidases under low oxidative stress and ATP-independent chaperones upon exposure to high peroxide concentrations. These alternative functions have been associated with changes in the oligomerization state from low-(LMW) to high-molecular-weight (HMW) species. Here we present the structures of Schistosoma mansoni PrxI in both states: the LMW decamer and the HMW 20-mer formed by two stacked decamers. The latter is the structure of a 2-Cys Prx chaperonic form. Comparison of the structures sheds light on the mechanism by which chemical stressors, such as high H(2)O(2) concentration and acidic pH, are sensed and translated into a functional switch in this protein family. We also propose a model to account for the in vivo formation of long filaments of stacked Prx rings.


    Organizational Affiliation

    Department of Biochemical Sciences, Sapienza University of Rome and Istituto Pasteur-Fondazione Cenci Bolognetti, P.le Aldo Moro 5, 00185 Rome, Italy.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
THIOREDOXIN PEROXIDASE
A, B, C, E, F, G, H, I
A, B, C, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T
219Schistosoma mansoniMutation(s): 0 
Gene Names: TPx-1TPx1
EC: 1.11.1.15
UniProt
Find proteins for O97161 (Schistosoma mansoni)
Explore O97161 
Go to UniProtKB:  O97161
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
THIOREDOXIN PEROXIDASED219Schistosoma mansoniMutation(s): 0 
Gene Names: TPx-1TPx1
EC: 1.11.1.15
UniProt
Find proteins for O97161 (Schistosoma mansoni)
Explore O97161 
Go to UniProtKB:  O97161
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.233 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 126.911α = 90
b = 204.94β = 114.6
c = 126.845γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-03-21
    Type: Initial release