7NCP

Glutathione-S-transferase GliG mutant K127A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural and Mechanistic Insights into C-S Bond Formation in Gliotoxin.

Scherlach, K.Kuttenlochner, W.Scharf, D.H.Brakhage, A.A.Hertweck, C.Groll, M.Huber, E.M.

(2021) Angew Chem Int Ed Engl 60: 14188-14194

  • DOI: 10.1002/anie.202104372
  • Primary Citation of Related Structures:  
    7NCD, 7NCE, 7NCB, 7NC6, 7NC5, 7NC8, 7NC9, 7NC2, 7NC3, 7NC1

  • PubMed Abstract: 
  • Glutathione-S-transferases (GSTs) usually detoxify xenobiotics. The human pathogenic fungus Aspergillus fumigatus however uses the exceptional GST GliG to incorporate two sulfur atoms into its virulence factor gliotoxin. Because these sulfurs are essential for biological activity, glutathionylation is a key step of gliotoxin biosynthesis ...

    Glutathione-S-transferases (GSTs) usually detoxify xenobiotics. The human pathogenic fungus Aspergillus fumigatus however uses the exceptional GST GliG to incorporate two sulfur atoms into its virulence factor gliotoxin. Because these sulfurs are essential for biological activity, glutathionylation is a key step of gliotoxin biosynthesis. Yet, the mechanism of carbon-sulfur linkage formation from a bis-hydroxylated precursor is unresolved. Here, we report structures of GliG with glutathione (GSH) and its reaction product cyclo[-l-Phe-l-Ser]-bis-glutathione, which has been purified from a genetically modified A. fumigatus strain. The structures argue for stepwise processing of first the Phe and second the Ser moiety. Enzyme-mediated dehydration of the substrate activates GSH and a helix dipole stabilizes the resulting anion via a water molecule for the nucleophilic attack. Activity assays with mutants validate the interactions of GliG with the ligands and enrich our knowledge about enzymatic C-S bond formation in gliotoxin and epipolythiodioxopiperazine (ETP) natural compounds in general.


    Organizational Affiliation

    Technical University of Munich, Center for Protein Assemblies, Ernst-Otto-Fischer-Strasse 8, 85747, Garching, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutathione S-transferase GliGA, B, C, D, E, F253Aspergillus fumigatus A1163Mutation(s): 1 
Gene Names: AFUB_075740
UniProt
Find proteins for B0Y813 (Neosartorya fumigata (strain CEA10 / CBS 144.89 / FGSC A1163))
Explore B0Y813 
Go to UniProtKB:  B0Y813
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.94α = 90
b = 85.14β = 90
c = 343.22γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2021-01-29 
  • Released Date: 2021-05-12 
  • Deposition Author(s): Groll, M., Huber, E.M.

Revision History  (Full details and data files)

  • Version 1.0: 2021-05-12
    Type: Initial release
  • Version 1.1: 2021-06-16
    Changes: Database references