Crystal Structure of GSH-dependent Disulfide bond Oxidoreductase

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.194 

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Analysis of the structure and function of YfcG from Escherichia coli reveals an efficient and unique disulfide bond reductase.

Wadington, M.C.Ladner, J.E.Stourman, N.V.Harp, J.M.Armstrong, R.N.

(2009) Biochemistry 48: 6559-6561

  • DOI: https://doi.org/10.1021/bi9008825
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    YfcG is one of eight glutathione (GSH) transferase homologues encoded in the Escherichia coli genome. The protein exhibits low or no GSH transferase activity toward a panel of electrophilic substrates. In contrast, it has a very robust disulfide-bond reductase activity toward 2-hydroxyethyldisulfide on par with mammalian and bacterial glutaredoxins. The structure of YfcG at 2.3 A-resolution from crystals grown in the presence of GSH reveals a molecule of glutathione disulfide in the active site. The crystallographic results and the lack of functional cysteine residues in the active site of YfcG suggests that the reductase activity is unique in that no sulfhydryl groups in the YfcG protein are covalently involved in the redox chemistry.

  • Organizational Affiliation

    Department of Biochemistry, Vanderbilt University, Nashville, Tennessee 37232-0146, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GST-like protein yfcG215Escherichia coli K-12Mutation(s): 0 
Gene Names: yfcG
Find proteins for P77526 (Escherichia coli (strain K12))
Explore P77526 
Go to UniProtKB:  P77526
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP77526
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on GDS

Download Ideal Coordinates CCD File 
C20 H32 N6 O12 S2
Binding Affinity Annotations 
IDSourceBinding Affinity
GDS PDBBind:  3GX0 Kd: 3.30e+5 (nM) from 1 assay(s)
Binding MOAD:  3GX0 Kd: 2400 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.194 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.49α = 90
b = 68.49β = 90
c = 111.99γ = 90
Software Package:
Software NamePurpose
SAINTdata scaling
PDB_EXTRACTdata extraction
SAINTdata reduction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-02-21
    Changes: Data collection, Database references, Derived calculations