6GHF

Crystal structure of a GST variant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.52 Å
  • R-Value Free: 0.333 
  • R-Value Work: 0.295 
  • R-Value Observed: 0.299 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Expanding the Plant GSTome Through Directed Evolution: DNA Shuffling for the Generation of New Synthetic Enzymes With Engineered Catalytic and Binding Properties.

Chronopoulou, E.G.Papageorgiou, A.C.Ataya, F.Nianiou-Obeidat, I.Madesis, P.Labrou, N.E.

(2018) Front Plant Sci 9: 1737-1737

  • DOI: https://doi.org/10.3389/fpls.2018.01737
  • Primary Citation of Related Structures:  
    6GHF

  • PubMed Abstract: 

    Glutathione transferases (GSTs, EC. 2.5.1.18) are inducible multifunctional enzymes that are essential in the detoxification and degradation of toxic compounds. GSTs have considerable biotechnological potential. In the present work, a new method for the generation of synthetic GSTs was developed. Abiotic stress treatment of Phaseolus vulgaris and Glycine max plants led to the induction of total GST activity and allowed the creation of a GST-enriched cDNA library using degenerated GST-specific primers and reverse transcription-PCR. This library was further diversified by employing directed evolution through DNA shuffling. Activity screening of the evolved library led to the identification of a novel tau class GST enzyme ( PvGm GSTUG). The enzyme was purified by affinity chromatography, characterized by kinetic analysis, and its structure was determined by X-ray crystallography. Interestingly, PvGm GSTUG displayed enhanced glutathione hydroperoxidase activity, which was significantly greater than that reported so far for natural tau class GSTs. In addition, the enzyme displayed unusual cooperative kinetics toward 1-chloro-2,4-dinitrochlorobenzene (CDNB) but not toward glutathione. The present work provides an easy approach for the simultaneous shuffling of GST genes from different plants, thus allowing the directed evolution of plants GSTome. This may permit the generation of new synthetic enzymes with interesting properties that are valuable in biotechnology.


  • Organizational Affiliation

    Laboratory of Enzyme Technology, Department of Biotechnology, School of Food, Biotechnology and Development, Agricultural University of Athens, Athens, Greece.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PvGmGSTUGA [auth B],
B [auth A]
224synthetic constructMutation(s): 0 
Gene Names: Synthetic
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.52 Å
  • R-Value Free: 0.333 
  • R-Value Work: 0.295 
  • R-Value Observed: 0.299 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51α = 90
b = 51β = 90
c = 227.49γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-12-26
    Type: Initial release
  • Version 1.1: 2024-01-17
    Changes: Data collection, Database references, Refinement description