2C21

Specificity of the Trypanothione-dependednt Leishmania major Glyoxalase I: Structure and biochemical comparison with the human enzyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.155 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Specificity of the Trypanothione-Dependent Leishmania Major Glyoxalase I: Structure and Biochemical Comparison with the Human Enzyme.

Ariza, A.Vickers, T.J.Greig, N.Armour, K.A.Dixon, M.J.Eggleston, I.M.Fairlamb, A.H.Bond, C.S.

(2006) Mol.Microbiol. 59: 1239

  • DOI: 10.1111/j.1365-2958.2006.05022.x

  • PubMed Abstract: 
  • Trypanothione replaces glutathione in defence against cellular damage caused by oxidants, xenobiotics and methylglyoxal in the trypanosomatid parasites, which cause trypanosomiasis and leishmaniasis. In Leishmania major, the first step in methylglyox ...

    Trypanothione replaces glutathione in defence against cellular damage caused by oxidants, xenobiotics and methylglyoxal in the trypanosomatid parasites, which cause trypanosomiasis and leishmaniasis. In Leishmania major, the first step in methylglyoxal detoxification is performed by a trypanothione-dependent glyoxalase I (GLO1) containing a nickel cofactor; all other characterized eukaryotic glyoxalases use zinc. In kinetic studies L. major and human enzymes were active with methylglyoxal derivatives of several thiols, but showed opposite substrate selectivities: N1-glutathionylspermidine hemithioacetal is 40-fold better with L. major GLO1, whereas glutathione hemithioacetal is 300-fold better with human GLO1. Similarly, S-4-bromobenzylglutathionylspermidine is a 24-fold more potent linear competitive inhibitor of L. major than human GLO1 (Kis of 0.54 microM and 12.6 microM, respectively), whereas S-4-bromobenzylglutathione is >4000-fold more active against human than L. major GLO1 (Kis of 0.13 microM and >500 microM respectively). The crystal structure of L. major GLO1 reveals differences in active site architecture to both human GLO1 and the nickel-dependent Escherichia coli GLO1, including increased negative charge and hydrophobic character and truncation of a loop that may regulate catalysis in the human enzyme. These differences correlate with the differential binding of glutathione and trypanothione-based substrates, and thus offer a route to the rational design of L. major-specific GLO1 inhibitors.


    Organizational Affiliation

    Division of Biological Chemistry & Molecular Microbiology, Wellcome Trust Biocentre, School of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRYPANOTHIONE-DEPENDENT GLYOXALASE I
A, B, C, D, E, F
144Leishmania majorMutation(s): 0 
Gene Names: GLO1
Find proteins for Q68RJ8 (Leishmania major)
Go to Gene View: GLO1
Go to UniProtKB:  Q68RJ8
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
B, D
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
MRD
Query on MRD

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Download CCD File 
A, D
(4R)-2-METHYLPENTANE-2,4-DIOL
C6 H14 O2
SVTBMSDMJJWYQN-RXMQYKEDSA-N
 Ligand Interaction
NI
Query on NI

Download SDF File 
Download CCD File 
A, C, E
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
MPD
Query on MPD

Download SDF File 
Download CCD File 
A, B, C, D, E
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.155 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 130.193α = 90.00
b = 148.957β = 90.00
c = 50.698γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MOLREPphasing
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-02-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance