5IJT

Human Peroxiredoxin 2 Oxidized (SS)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.208 

wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

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
  • Primary Citation of Related Structures:  
    5IJT

  • PubMed Abstract: 
  • 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. ...

    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

    Center for Molecular Signaling, Wake Forest University, Winston-Salem, North Carolina 27101.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Peroxiredoxin-2ABCDEFGHIJ198Homo sapiensMutation(s): 0 
Gene Names: PRDX2NKEFBTDPX1
EC: 1.11.1.15 (PDB Primary Data), 1.11.1.24 (UniProt)
Find proteins for P32119 (Homo sapiens)
Explore P32119 
Go to UniProtKB:  P32119
NIH Common Fund Data Resources
PHAROS  P32119
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.014α = 90
b = 198.784β = 96.28
c = 116.523γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-3000data reduction
HKL-3000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM072866

Revision History 

  • Version 1.0: 2017-09-06
    Type: Initial release
  • Version 1.1: 2017-09-27
    Changes: Author supporting evidence
  • Version 2.0: 2019-03-27
    Changes: Data collection, Database references, Polymer sequence
  • Version 2.1: 2019-12-25
    Changes: Author supporting evidence