1K0B

Ure2p in Complex with Glutathione


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structures of the yeast prion Ure2p functional region in complex with glutathione and related compounds.

Bousset, L.Belrhali, H.Melki, R.Morera, S.

(2001) Biochemistry 40: 13564-13573

  • Primary Citation of Related Structures:  1JZR, 1K0A, 1K0C, 1K0D

  • PubMed Abstract: 
  • The [URE3] phenotype in yeast Saccharomyces cerevisiae is due to an altered prion form of Ure2p, a protein involved in nitrogen catabolism. To understand possible conformational changes at the origin of prion propagation, we previously solved the cry ...

    The [URE3] phenotype in yeast Saccharomyces cerevisiae is due to an altered prion form of Ure2p, a protein involved in nitrogen catabolism. To understand possible conformational changes at the origin of prion propagation, we previously solved the crystal structure of the Ure2p functional region [Bousset et al. (2001) Structure 9, 39-46]. We showed the protein to have a fold similar to that of the beta class of glutathione S-transferases (GSTs). Here we report crystal structures of the Ure2p functional region (extending from residues 95-354) in complex with glutathione (GSH), the substrate of all GSTs, and two widely used GST inhibitors, namely, S-hexylglutathione and S-p-nitrobenzylglutathione. In a manner similar to what is observed in many GSTs, ligand binding is not accompanied by a significant change in the conformation of the protein. We identify one GSH and one hydrophobic electrophile binding site per monomer as observed in all other GSTs. The sulfur group of GSH, that conjugates electrophiles, is located near the amide group of Asn124, allowing a hydrogen bond to be formed. Biochemical data indicate that GSH binds to Ure2p with high affinity. Its binding affects Ure2p oligomerization but has no effect on the assembly of the protein into amyloid fibrils. Despite results indicating that Ure2p lacks GST activity, we propose that Ure2p is a member of the GST superfamily that may describe a novel GST class. Our data bring new insights into the function of the Ure2p active region.


    Related Citations: 
    • Structure of the Globular Region of the Prion Protein Ure2 from the Yeast Saccharomyces cerevisiae
      Bousset, L.,Belrhali, H.,Janin, J.,Melki, R.,Morera, S.
      (2001) Structure 9: 39


    Organizational Affiliation

    Laboratoire d'Enzymologie et Biochimie Structurales, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
URE2 PROTEIN
A, B, C, D
260Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: URE2
EC: 1.11.1.9, 1.8.4.-
Find proteins for P23202 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P23202
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GSH
Query on GSH

Download SDF File 
Download CCD File 
A, C
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.504α = 90.00
b = 124.912β = 90.00
c = 160.846γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
CCP4data scaling
DENZOdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-12-21
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2011-12-21
    Type: Non-polymer description