4GSN

Crystal Structure of GSTe2 ZAN/U variant from Anopheles gambiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Metabolic and Target-Site Mechanisms Combine to Confer Strong DDT Resistance in Anopheles gambiae.

Mitchell, S.N.Rigden, D.J.Dowd, A.J.Lu, F.Wilding, C.S.Weetman, D.Dadzie, S.Jenkins, A.M.Regna, K.Boko, P.Djogbenou, L.Muskavitch, M.A.Ranson, H.Paine, M.J.Mayans, O.Donnelly, M.J.

(2014) PLoS One 9: e92662-e92662

  • DOI: https://doi.org/10.1371/journal.pone.0092662
  • Primary Citation of Related Structures:  
    4GSN

  • PubMed Abstract: 
  • The development of resistance to insecticides has become a classic exemplar of evolution occurring within human time scales. In this study we demonstrate how resistance to DDT in the major African malaria vector Anopheles gambiae is a result of both target-site resistance mechanisms that have introgressed between incipient species (the M- and S-molecular forms) and allelic variants in a DDT-detoxifying enzyme ...

    The development of resistance to insecticides has become a classic exemplar of evolution occurring within human time scales. In this study we demonstrate how resistance to DDT in the major African malaria vector Anopheles gambiae is a result of both target-site resistance mechanisms that have introgressed between incipient species (the M- and S-molecular forms) and allelic variants in a DDT-detoxifying enzyme. Sequencing of the detoxification enzyme, Gste2, from DDT resistant and susceptible strains of An. gambiae, revealed a non-synonymous polymorphism (I114T), proximal to the DDT binding domain, which segregated with strain phenotype. Recombinant protein expression and DDT metabolism analysis revealed that the proteins from the susceptible strain lost activity at higher DDT concentrations, characteristic of substrate inhibition. The effect of I114T on GSTE2 protein structure was explored through X-ray crystallography. The amino acid exchange in the DDT-resistant strain introduced a hydroxyl group nearby the hydrophobic DDT-binding region. The exchange does not result in structural alterations but is predicted to facilitate local dynamics and enzyme activity. Expression of both wild-type and 114T alleles the allele in Drosophila conferred an increase in DDT tolerance. The 114T mutation was significantly associated with DDT resistance in wild caught M-form populations and acts in concert with target-site mutations in the voltage gated sodium channel (Vgsc-1575Y and Vgsc-1014F) to confer extreme levels of DDT resistance in wild caught An. gambiae.


    Organizational Affiliation

    Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, United Kingdom; Malaria Programme, Wellcome Trust Sanger Institute, Hinxton, Cambridge, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutathione S-transferase E2
A, B, C, D
220Anopheles gambiaeMutation(s): 3 
UniProt
Find proteins for Q9GPL8 (Anopheles gambiae)
Explore Q9GPL8 
Go to UniProtKB:  Q9GPL8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9GPL8
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GSH
Query on GSH

Download Ideal Coordinates CCD File 
E [auth A],
G [auth B],
I [auth C],
J [auth D]
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
1PE
Query on 1PE

Download Ideal Coordinates CCD File 
F [auth A]PENTAETHYLENE GLYCOL
C10 H22 O6
JLFNLZLINWHATN-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
H [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.33α = 90
b = 86.38β = 90.73
c = 92.85γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
DNAdata collection

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-03-12
    Type: Initial release
  • Version 1.1: 2014-05-07
    Changes: Database references
  • Version 1.2: 2019-07-17
    Changes: Data collection, Refinement description