2C4J

Human glutathione-S-transferase M2-2 T210S mutant in complex with glutathione-styrene oxide conjugate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Alternative Mutations of a Positively Selected Residue Elicit Gain or Loss of Functionalities in Enzyme Evolution.

Norrgard, M.A.Ivarsson, Y.Tars, K.Mannervik, B.

(2006) Proc.Natl.Acad.Sci.USA 103: 4876

  • DOI: 10.1073/pnas.0600849103

  • PubMed Abstract: 
  • All molecular species in an organism are connected physically and functionally to other molecules. In evolving systems, it is not obvious to what extent functional properties of a protein can change to selective advantage and leave intact favorable t ...

    All molecular species in an organism are connected physically and functionally to other molecules. In evolving systems, it is not obvious to what extent functional properties of a protein can change to selective advantage and leave intact favorable traits previously acquired. This uncertainty has particular significance in the evolution of novel pathways for detoxication, because an organism challenged with new xenobiotics in the environment may still require biotransformation of previously encountered toxins. Positive selection has been proposed as an evolutionary mechanism for facile adaptive responses of proteins to changing conditions. Here, we show, by saturation mutagenesis, that mutations of a hypervariable residue in human glutathione transferase M2-2 can differentially change the enzyme's substrate-activity profile with alternative substrates and, furthermore, enable or disable dissimilar chemical reactions. Crystal structures demonstrate that activity with epoxides is enabled through removal of steric hindrance from a methyl group, whereas activities with an orthoquinone and a nitroso donor are maintained in the variant enzymes. Given the diversity of cellular activities in which a single protein can be engaged, the selective transmutation of functional properties has general significance in molecular evolution.


    Organizational Affiliation

    Department of Biochemistry and Organic Chemistry, Uppsala University, Biomedical Center, Box 576, SE-75123 Uppsala, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTATHIONE S-TRANSFERASE MU 2
A, B, C, D
218Homo sapiensMutation(s): 1 
Gene Names: GSTM2 (GST4)
EC: 2.5.1.18
Find proteins for P28161 (Homo sapiens)
Go to Gene View: GSTM2
Go to UniProtKB:  P28161
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GSO
Query on GSO

Download SDF File 
Download CCD File 
A, B, C, D
L-GAMMA-GLUTAMYL-S-[(2S)-2-HYDROXY-2-PHENYLETHYL]-L-CYSTEINYLGLYCINE
C18 H25 N3 O7 S
SZOWFFWYTHGUAW-MELADBBJSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.194 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 62.176α = 90.00
b = 67.768β = 99.06
c = 115.705γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
AMoREphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-10-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance