3KIJ

Crystal structure of the human PDI-peroxidase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Two Endoplasmic Reticulum PDI Peroxidases Increase the Efficiency of the Use of Peroxide during Disulfide Bond Formation.

Nguyen, V.D.Saaranen, M.J.Karala, A.R.Lappi, A.K.Wang, L.Raykhel, I.B.Alanen, H.I.Salo, K.E.Wang, C.C.Ruddock, L.W.

(2011) J.Mol.Biol. 406: 503-515

  • DOI: 10.1016/j.jmb.2010.12.039

  • PubMed Abstract: 
  • Disulfide bond formation in the endoplasmic reticulum by the sulfhydryl oxidase Ero1 family is thought to be accompanied by the concomitant formation of hydrogen peroxide. Since secretory cells can make substantial amounts of proteins that contain di ...

    Disulfide bond formation in the endoplasmic reticulum by the sulfhydryl oxidase Ero1 family is thought to be accompanied by the concomitant formation of hydrogen peroxide. Since secretory cells can make substantial amounts of proteins that contain disulfide bonds, the production of this reactive oxygen species could have potentially lethal consequences. Here, we show that two human proteins, GPx7 and GPx8, labeled as secreted glutathione peroxidases, are actually endoplasmic reticulum-resident protein disulfide isomerase peroxidases. In vitro, the addition of GPx7 or GPx8 to a folding protein along with protein disulfide isomerase and peroxide enables the efficient oxidative refolding of a reduced denatured protein. Furthermore, both GPx7 and GPx8 interact with Ero1α in vivo, and GPx7 significantly increases oxygen consumption by Ero1α in vitro. Hence, GPx7 and GPx8 may represent a novel route for the productive use of peroxide produced by Ero1α during disulfide bond formation.


    Organizational Affiliation

    Department of Biochemistry, University of Oulu, Linnanmaa Campus, 90570 Oulu, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Probable glutathione peroxidase 8
A, B, C
180Homo sapiensMutation(s): 0 
Gene Names: GPX8
EC: 1.11.1.9
Find proteins for Q8TED1 (Homo sapiens)
Go to Gene View: GPX8
Go to UniProtKB:  Q8TED1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.209 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 90.430α = 90.00
b = 122.300β = 117.90
c = 70.180γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
MAR345data collection
PHASERphasing
REFMACrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-01-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description