5JCG

Structure of Human Peroxiredoxin 3 as three stacked rings


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.183 

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

  • 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 ...

    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; Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thioredoxin-dependent peroxide reductase, mitochondrial
A, B, C, D, E, F, G, H, I
201Homo sapiensMutation(s): 0 
Gene Names: PRDX3 (AOP1)
EC: 1.11.1.15
Find proteins for P30048 (Homo sapiens)
Go to Gene View: PRDX3
Go to UniProtKB:  P30048
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.183 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 133.188α = 90.00
b = 168.730β = 90.00
c = 221.550γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
Aimlessdata scaling
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
RSNZNew ZealandRDF-UOA-1303

Revision History 

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