Human Peroxiredoxin 2 Oxidized (SS)

Experimental Data Snapshot

  • Resolution: 2.148 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report

This is version 2.0 of the entry. See complete history


Novel hyperoxidation resistance motifs in 2-Cys peroxiredoxins.

Bolduc, J.A.Nelson, K.J.Haynes, A.C.Lee, J.Reisz, J.A.Graff, A.H.Clodfelter, J.E.Parsonage, D.Poole, L.B.Furdui, C.M.Lowther, W.T.

(2018) J. Biol. Chem. 293: 11901-11912

  • DOI: 10.1074/jbc.RA117.001690

  • PubMed Abstract: 
  • 2-Cys peroxiredoxins (Prxs) modulate hydrogen peroxide (H <sub>2 </sub>O <sub>2 </sub>)-mediated cell signaling. At high H <sub>2 </sub>O <sub>2 </sub> levels, eukaryotic Prxs can be inactivated by hyperoxidation and are classified as sensitive Prxs. ...

    2-Cys peroxiredoxins (Prxs) modulate hydrogen peroxide (H 2 O 2 )-mediated cell signaling. At high H 2 O 2 levels, eukaryotic Prxs can be inactivated by hyperoxidation and are classified as sensitive Prxs. In contrast, prokaryotic Prxs are categorized as being resistant to hyperoxidation and lack the GGLG and C-terminal YF motifs present in the sensitive Prxs. Additional molecular determinants that account for the subtle differences in the susceptibility to hyperoxidation remain to be identified. A comparison of a new, 2.15-Å-resolution crystal structure of Prx2 in the oxidized, disulfide-bonded state with the hyperoxidized structure of Prx2 and Prx1 in complex with sulfiredoxin revealed three structural regions that rearrange during catalysis. With these regions in hand, focused sequence analyses were performed comparing sensitive and resistant Prx groups. From this combinatorial approach, we discovered two novel hyperoxidation resistance motifs, motifs A and B, which were validated using mutagenesis of sensitive human Prxs and resistant Salmonella enterica serovar Typhimurium AhpC. Introduction and removal of these motifs, respectively, resulted in drastic changes in the sensitivity to hyperoxidation with Prx1 becoming 100-fold more resistant to hyperoxidation and AhpC becoming 800-fold more sensitive to hyperoxidation. The increased sensitivity of the latter AhpC variant was also confirmed in vivo These results support the function of motifs A and B as primary drivers for tuning the sensitivity of Prxs to different levels of H 2 O 2 , thus enabling the initiation of variable signaling or antioxidant responses in cells.

    Organizational Affiliation

    Section on Molecular Medicine, Department of Internal Medicine.,From the Center for Structural Biology, Department of Biochemistry, tlowther@wakehealth.edu.,From the Center for Structural Biology, Department of Biochemistry.,Center for Molecular Signaling, Wake Forest University, Winston-Salem, North Carolina 27101.,Center for Redox Biology and Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina 27157 and.,Wake Forest Baptist Comprehensive Cancer Center, and.


Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
A, B, C, D, E, F, G, H, I, J
198Homo sapiensMutation(s): 0 
Gene Names: PRDX2 (NKEFB, TDPX1)
Find proteins for P32119 (Homo sapiens)
Go to Gene View: PRDX2
Go to UniProtKB:  P32119
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
Query on ZN

Download SDF File 
Download CCD File 
B, F, H
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Resolution: 2.148 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.207 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 50.014α = 90.00
b = 198.784β = 96.28
c = 116.523γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data scaling
HKL-3000data reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM072866

Revision History 

  • Version 1.0: 2017-09-06
    Type: Initial release
  • Version 1.1: 2017-09-27
    Type: Author supporting evidence
  • Version 2.0: 2019-03-27
    Type: Data collection, Database references, Polymer sequence