1OEP

Structure of Trypanosoma brucei enolase reveals the inhibitory divalent metal site


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Crystal Structure of Trypanosoma Brucei Enolase: Visualisation of the Inhibitory Metal Binding Site III and Potential as Target for Selective, Irreversible Inhibition

Da Silva Giotto, M.T.Hannaert, V.Vertommen, D.Navarro, M.V.A.S.Rider, M.H.Michels, P.A.M.Garratt, R.C.Rigden, D.J.

(2003) J.Mol.Biol. 331: 653

  • Also Cited By: 2PU1, 2PU0, 2PTZ, 2PTY, 2PTX, 2PTW

  • PubMed Abstract: 
  • The glycolytic enzymes of the trypanosomatids, that cause a variety of medically and agriculturally important diseases, are validated targets for drug design. Design of species-specific inhibitors is facilitated by the availability of structural data ...

    The glycolytic enzymes of the trypanosomatids, that cause a variety of medically and agriculturally important diseases, are validated targets for drug design. Design of species-specific inhibitors is facilitated by the availability of structural data. Irreversible inhibitors, that bound covalently to the parasite enzyme alone, would be potentially particularly effective. Here we determine the crystal structure of enolase from Trypanosoma brucei and show that two cysteine residues, located in a water-filled cavity near the active-site, are modified by iodoacetamide leading to loss of catalytic activity. Since these residues are specific to the Trypanosomatidae lineage, this finding opens the way for the development of parasite-specific, irreversibly binding enolase inhibitors. In the present structure, the catalytic site is partially occupied by sulphate and two zinc ions. Surprisingly, one of these zinc ions illustrates the existence of a novel enolase-binding site for divalent metals. Evidence suggests that this is the first direct visualization of the elusive inhibitory metal site, whose existence has hitherto only been inferred from kinetic data.


    Organizational Affiliation

    Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos SP, Brazil.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ENOLASE
A
432Trypanosoma brucei bruceiMutation(s): 0 
EC: 4.2.1.11
Find proteins for Q9NDH8 (Trypanosoma brucei brucei)
Go to UniProtKB:  Q9NDH8
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.210 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 74.018α = 90.00
b = 110.536β = 90.00
c = 109.098γ = 90.00
Software Package:
Software NamePurpose
AUTOMARdata reduction
CNSrefinement
AUTOMARdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-04-02
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance