4O5R

Crystal structure of Alkylhydroperoxide Reductase subunit C from E. coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.33 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.241 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure, mechanism and ensemble formation of the alkylhydroperoxide reductase subunits AhpC and AhpF from Escherichia coli

Dip, P.V.Kamariah, N.Subramanian Manimekalai, M.S.Nartey, W.Balakrishna, A.M.Eisenhaber, F.Eisenhaber, B.Gruber, G.

(2014) Acta Crystallogr.,Sect.D 70: 2848-2862

  • DOI: 10.1107/S1399004714019233
  • Primary Citation of Related Structures:  
  • Also Cited By: 5B8B, 5B8A, 4YKG, 4YKF

  • PubMed Abstract: 
  • Hydroperoxides are reactive oxygen species (ROS) that are toxic to all cells and must be converted into the corresponding alcohols to alleviate oxidative stress. In Escherichia coli, the enzyme primarily responsible for this reaction is alkylhydroper ...

    Hydroperoxides are reactive oxygen species (ROS) that are toxic to all cells and must be converted into the corresponding alcohols to alleviate oxidative stress. In Escherichia coli, the enzyme primarily responsible for this reaction is alkylhydroperoxide reductase (AhpR). Here, the crystal structures of both of the subunits of EcAhpR, EcAhpF (57 kDa) and EcAhpC (21 kDa), have been solved. The EcAhpF structures (2.0 and 2.65 Å resolution) reveal an open and elongated conformation, while that of EcAhpC (3.3 Å resolution) forms a decameric ring. Solution X-ray scattering analysis of EcAhpF unravels the flexibility of its N-terminal domain, and its binding to EcAhpC was demonstrated by isothermal titration calorimetry. These studies suggest a novel overall mechanistic model of AhpR as a hydroperoxide scavenger, in which the dimeric, extended AhpF prefers complex formation with the AhpC ring to accelerate the catalytic activity and thus to increase the chance of rescuing the cell from ROS.


    Related Citations: 
    • Peroxiredoxin Evolution and the Regulation of Hydrogen Peroxide Signaling
      Wood, Z.A.,Poole, L.B.,Karplus, P.A.
      (2003) Science 300: 650


    Organizational Affiliation

    Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), 30 Biopolis Street, #07-01 Matrix, Singapore 138671, Singapore.,School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AhpC component, subunit of alkylhydroperoxide reductase
A, B, C, D, E
187Escherichia coli (strain B / BL21-DE3)Mutation(s): 0 
EC: 1.11.1.15
Find proteins for A0A140NC97 (Escherichia coli (strain B / BL21-DE3))
Go to UniProtKB:  A0A140NC97
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.33 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.241 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 137.349α = 90.00
b = 137.349β = 90.00
c = 147.450γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-11-05
    Type: Initial release
  • Version 1.1: 2014-11-12
    Type: Database references
  • Version 1.2: 2015-02-25
    Type: Database references