Crystal structure of Drosophila melanogaster glutathione S-transferase epsilon 14 in complex with glutathione and 2-methyl-2,4-pentanediol

Experimental Data Snapshot

  • Resolution: 1.30 Å
  • R-Value Free: 0.164 
  • R-Value Work: 0.157 
  • R-Value Observed: 0.157 

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Structure and steroid isomerase activity of Drosophila glutathione transferase E14 essential for ecdysteroid biosynthesis.

Skerlova, J.Lindstrom, H.Gonis, E.Sjodin, B.Neiers, F.Stenmark, P.Mannervik, B.

(2020) FEBS Lett 594: 1187-1195

  • DOI: https://doi.org/10.1002/1873-3468.13718
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Ecdysteroids are critically important for the formation of the insect exoskeleton. Cholesterol is a precursor of ecdysone and its active form 20-hydroxyecdysone, but some steps in the ecdysteroid biosynthesis pathway remain unknown. An essential requirement of glutathione (GSH) transferase GSTE14 in ecdysteroid biosynthesis has been established in Drosophila melanogaster, but its function is entirely unknown. Here, we have determined the crystal structure of GSTE14 in complex with GSH and investigated the kinetic properties of GSTE14 with alternative substrates. GSTE14 has high-ranking steroid double-bond isomerase activity, albeit 50-fold lower than the most efficient mammalian GSTs. Corresponding steroid isomerizations are unknown in insects, and their exact physiological role remains to be shown. Nonetheless, the essential enzyme GSTE14 is here demonstrated to be catalytically competent and have a steroid-binding site.

  • Organizational Affiliation

    Department of Biochemistry and Biophysics, Stockholm University, Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glutathione S-transferase E14238Drosophila melanogasterMutation(s): 0 
Gene Names: GstE14GSTD14-14noboCG4688
Find proteins for Q7JYX0 (Drosophila melanogaster)
Explore Q7JYX0 
Go to UniProtKB:  Q7JYX0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7JYX0
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.30 Å
  • R-Value Free: 0.164 
  • R-Value Work: 0.157 
  • R-Value Observed: 0.157 
  • Space Group: P 42 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.201α = 90
b = 76.201β = 90
c = 100.65γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
PDB_EXTRACTdata extraction
xia2data reduction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Ministry of Education (Czech Republic)Czech RepublicCZ.02.2.69/0.0/0.0/16_027/0008477
Swedish Research CouncilSweden2015-04222
Swedish Research CouncilSweden2018-03406

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-29
    Type: Initial release
  • Version 1.1: 2020-02-19
    Changes: Database references
  • Version 1.2: 2020-04-22
    Changes: Database references
  • Version 1.3: 2024-01-24
    Changes: Data collection, Database references, Refinement description