8BHC

K141H and S142H double mutant of hGSTA1-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.56 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.166 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A Key Role in Catalysis and Enzyme Thermostability of a Conserved Helix H5 Motif of Human Glutathione Transferase A1-1.

Chronopoulou, E.G.Mutabdzija, L.Poudel, N.Papageorgiou, A.C.Labrou, N.E.

(2023) Int J Mol Sci 24

  • DOI: https://doi.org/10.3390/ijms24043700
  • Primary Citation of Related Structures:  
    8BHC, 8BHE

  • PubMed Abstract: 

    Glutathione transferases (GSTs) are promiscuous enzymes whose main function is the detoxification of electrophilic compounds. These enzymes are characterized by structural modularity that underpins their exploitation as dynamic scaffolds for engineering enzyme variants, with customized catalytic and structural properties. In the present work, multiple sequence alignment of the alpha class GSTs allowed the identification of three conserved residues (E137, K141, and S142) at α-helix 5 (H5). A motif-directed redesign of the human glutathione transferase A1-1 (hGSTA1-1) was performed through site-directed mutagenesis at these sites, creating two single- and two double-point mutants (E137H, K141H, K141H/S142H, and E137H/K141H). The results showed that all the enzyme variants displayed enhanced catalytic activity compared to the wild-type enzyme hGSTA1-1, while the double mutant hGSTA1-K141H/S142H also showed improved thermal stability. X-ray crystallographic analysis revealed the molecular basis of the effects of double mutations on enzyme stability and catalysis. The biochemical and structural analysis presented here will contribute to a deeper understanding of the structure and function of alpha class GSTs.


  • Organizational Affiliation

    Laboratory of Enzyme Technology, Department of Biotechnology, School of Applied Biology and Biotechnology, Agricultural University of Athens, 75 Iera Odos Street, 11855 Athens, Greece.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutathione S-transferase A1A [auth C],
B [auth A],
C [auth D],
D [auth B]
222Homo sapiensMutation(s): 2 
Gene Names: GSTA1
EC: 2.5.1.18 (PDB Primary Data), 1.11.1 (PDB Primary Data), 5.3.3 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P08263 (Homo sapiens)
Explore P08263 
Go to UniProtKB:  P08263
PHAROS:  P08263
GTEx:  ENSG00000243955 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08263
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
CME
Query on CME
A [auth C],
B [auth A],
C [auth D],
D [auth B]
L-PEPTIDE LINKINGC5 H11 N O3 S2CYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.56 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.166 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.5α = 90
b = 93.85β = 97.92
c = 94.08γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
autoXDSdata processing
Aimlessdata scaling
PHASERphasing
autoXDSdata reduction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Union (EU)European Union871037

Revision History  (Full details and data files)

  • Version 1.0: 2023-03-08
    Type: Initial release
  • Version 1.1: 2024-02-07
    Changes: Data collection, Refinement description