5JCG

Structure of Human Peroxiredoxin 3 as three stacked rings


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structures of Human Peroxiredoxin 3 Suggest Self-Chaperoning Assembly that Maintains Catalytic State.

Yewdall, N.A.Venugopal, H.Desfosses, A.Abrishami, V.Yosaatmadja, Y.Hampton, M.B.Gerrard, J.A.Goldstone, D.C.Mitra, A.K.Radjainia, M.

(2016) Structure 24: 1120-1129

  • DOI: 10.1016/j.str.2016.04.013
  • Primary Citation of Related Structures:  
    5JCG

  • PubMed Abstract: 
  • Peroxiredoxins are antioxidant proteins primarily responsible for detoxification of hydroperoxides in cells. On exposure to various cellular stresses, peroxiredoxins can acquire chaperone activity, manifested as quaternary reorganization into a high molecular weight (HMW) form ...

    Peroxiredoxins are antioxidant proteins primarily responsible for detoxification of hydroperoxides in cells. On exposure to various cellular stresses, peroxiredoxins can acquire chaperone activity, manifested as quaternary reorganization into a high molecular weight (HMW) form. Acidification, for example, causes dodecameric rings of human peroxiredoxin 3 (HsPrx3) to stack into long helical filaments. In this work, a 4.1-Å resolution structure of low-pH-instigated helical filaments was elucidated, showing a locally unfolded active site and partially folded C terminus. A 2.8-Å crystal structure of HsPrx3 was determined at pH 8.5 under reducing conditions, wherein dodecameric rings are arranged as a short stack, with symmetry similar to low-pH filaments. In contrast to previous observations, the crystal structure displays both a fully folded active site and ordered C terminus, suggesting that the HsPrx3 HMW form maintains catalytic activity. We propose a new role for the HMW form as a self-chaperoning assembly maintaining HsPrx3 function under stress.


    Organizational Affiliation

    School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1010, New Zealand. Electronic address: mazdak.radjainia@monash.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thioredoxin-dependent peroxide reductase, mitochondrial
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H, I
201Homo sapiensMutation(s): 0 
Gene Names: PRDX3AOP1
EC: 1.11.1.15 (PDB Primary Data), 1.11.1.24 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P30048 (Homo sapiens)
Explore P30048 
Go to UniProtKB:  P30048
PHAROS:  P30048
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.185 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 133.188α = 90
b = 168.73β = 90
c = 221.55γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
RSNZNew ZealandRDF-UOA-1303

Revision History  (Full details and data files)

  • Version 1.0: 2016-05-25
    Type: Initial release
  • Version 1.1: 2016-06-15
    Changes: Database references
  • Version 1.2: 2016-07-20
    Changes: Database references