3ERF

Crystal structure of Gtt2 from Saccharomyces cerevisiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.23 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


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Literature

Structures of yeast glutathione-S-transferase Gtt2 reveal a new catalytic type of GST family.

Ma, X.X.Jiang, Y.L.He, Y.X.Bao, R.Chen, Y.H.Zhou, C.Z.

(2009) Embo Rep. 10: 1320-1326

  • DOI: 10.1038/embor.2009.216
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Glutathione-S-transferases (GSTs) are ubiquitous detoxification enzymes that catalyse the conjugation of electrophilic substrates to glutathione. Here, we present the crystal structures of Gtt2, a GST of Saccharomyces cerevisiae, in apo and two ligan ...

    Glutathione-S-transferases (GSTs) are ubiquitous detoxification enzymes that catalyse the conjugation of electrophilic substrates to glutathione. Here, we present the crystal structures of Gtt2, a GST of Saccharomyces cerevisiae, in apo and two ligand-bound forms, at 2.23 A, 2.20 A and 2.10 A, respectively. Although Gtt2 has the overall structure of a GST, the absence of the classic catalytic essential residues--tyrosine, serine and cysteine--distinguishes it from all other cytosolic GSTs of known structure. Site-directed mutagenesis in combination with activity assays showed that instead of the classic catalytic residues, a water molecule stabilized by Ser129 and His123 acts as the deprotonator of the glutathione sulphur atom. Furthermore, only glycine and alanine are allowed at the amino-terminus of helix-alpha1 because of stereo-hindrance. Taken together, these results show that yeast Gtt2 is a novel atypical type of cytosolic GST.


    Organizational Affiliation

    Hefei National Laboratory for Physical Sciences at Microscale, and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutathione S-transferase 2
A
233Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: GTT2
EC: 2.5.1.18
Find proteins for Q12390 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12390
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.23 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.212 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 88.298α = 90.00
b = 88.298β = 90.00
c = 69.136γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
MOLREPphasing
MAR345dtbdata collection
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance