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 
  • R-Value Observed: 0.214 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


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:  
    3ERF, 3ERG, 3IBH

  • 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 ligand-bound forms, at 2 ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutathione S-transferase 2A233Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: GTT2L0560YLL060C
EC: 2.5.1.18
UniProt
Find proteins for Q12390 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12390 
Go to UniProtKB:  Q12390
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ12390
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.23 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.298α = 90
b = 88.298β = 90
c = 69.136γ = 120
Software Package:
Software NamePurpose
MAR345dtbdata collection
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-10-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2019-12-25
    Changes: Derived calculations