3RBT

Crystal structure of glutathione S-transferase Omega 3 from the silkworm Bombyx mori


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure-guided activity restoration of the silkworm glutathione transferase Omega GSTO3-3

Chen, B.-Y.Ma, X.-X.Guo, P.-C.Tan, X.Li, W.-F.Yang, J.-P.Zhang, N.-N.Chen, Y.Xia, Q.Zhou, C.-Z.

(2011) J.Mol.Biol. 412: 204-211

  • DOI: 10.1016/j.jmb.2011.07.019

  • PubMed Abstract: 
  • Glutathione transferases (GSTs) are ubiquitous detoxification enzymes that conjugate hydrophobic xenobiotics with reduced glutathione. The silkworm Bombyx mori encodes four isoforms of GST Omega (GSTO), featured with a catalytic cysteine, except that ...

    Glutathione transferases (GSTs) are ubiquitous detoxification enzymes that conjugate hydrophobic xenobiotics with reduced glutathione. The silkworm Bombyx mori encodes four isoforms of GST Omega (GSTO), featured with a catalytic cysteine, except that bmGSTO3-3 has an asparagine substitution of this catalytic residue. Here, we determined the 2.20-Å crystal structure of bmGSTO3-3, which shares a typical GST overall structure. However, the extended C-terminal segment that exists in all the four bmGSTOs occupies the G-site of bmGSTO3-3 and makes it unworkable, as shown by the activity assays. Upon mutation of Asn29 to Cys and truncation of the C-terminal segment, the in vitro GST activity of bmGSTO3-3 could be restored. These findings provided structural insights into the activity regulation of GSTOs.


    Organizational Affiliation

    School of Life Sciences and Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutathione transferase o1
A, B, C, D
246Bombyx moriMutation(s): 0 
Find proteins for Q1HPV9 (Bombyx mori)
Go to UniProtKB:  Q1HPV9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B, C, D
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.215 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 108.537α = 90.00
b = 139.030β = 90.00
c = 128.816γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
REFMACrefinement
PHASERphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-10
    Type: Initial release
  • Version 1.1: 2012-09-19
    Type: Database references, Derived calculations