1N8J

Crystal Structure of AhpC with Active Site Cysteine mutated to Serine (C46S)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Peroxiredoxin Evolution and the Regulation of Hydrogen Peroxide Signaling

Wood, Z.A.Poole, L.B.Karplus, P.A.

(2003) Science 300: 650-653

  • DOI: 10.1126/science.1080405

  • PubMed Abstract: 
  • Eukaryotic 2-Cys peroxiredoxins (2-Cys Prxs) not only act as antioxidants, but also appear to regulate hydrogen peroxide-mediated signal transduction. We show that bacterial 2-Cys Prxs are much less sensitive to oxidative inactivation than are eukary ...

    Eukaryotic 2-Cys peroxiredoxins (2-Cys Prxs) not only act as antioxidants, but also appear to regulate hydrogen peroxide-mediated signal transduction. We show that bacterial 2-Cys Prxs are much less sensitive to oxidative inactivation than are eukaryotic 2-Cys Prxs. By identifying two sequence motifs unique to the sensitive 2-Cys Prxs and comparing the crystal structure of a bacterial 2-Cys Prx at 2.2 angstrom resolution with other Prx structures, we define the structural origins of sensitivity. We suggest this adaptation allows 2-Cys Prxs to act as floodgates, keeping resting levels of hydrogen peroxide low, while permitting higher levels during signal transduction.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97333, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alkyl hydroperoxide reductase C22 protein
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T
186Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)Gene Names: ahpC
EC: 1.11.1.15
Find proteins for P0A251 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Go to UniProtKB:  P0A251
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.188 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 106.080α = 102.43
b = 107.330β = 116.22
c = 120.080γ = 98.81
Software Package:
Software NamePurpose
CNSrefinement
CNSphasing
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-04-29
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2012-05-09
    Type: Structure summary