2W0H

X ray structure of Leishmania infantum Trypanothione reductase in complex with antimony and NADPH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular Basis of Antimony Treatment in Leishmaniasis.

Baiocco, P.Colotti, G.Franceschini, S.Ilari, A.

(2009) J.Med.Chem. 52: 2603

  • DOI: 10.1021/jm900185q
  • Primary Citation of Related Structures:  2JK6

  • PubMed Abstract: 
  • Leishmaniasis is a disease that affects 2 million people and kills 70000 persons every year. It is caused by Leishmania species, which are human protozoan parasites of the trypanosomatidae family. Trypanosomatidae differ from the other eukaryotes in ...

    Leishmaniasis is a disease that affects 2 million people and kills 70000 persons every year. It is caused by Leishmania species, which are human protozoan parasites of the trypanosomatidae family. Trypanosomatidae differ from the other eukaryotes in their specific redox metabolism because the glutathione/glutathione reductase system is replaced by the unique trypanothione/trypanothione reductase system. The current treatment of leishmaniasis relies mainly on antimonial drugs. The crystal structures of oxidized trypanothione reductase (TR) from Leishmania infantum and of the complex of reduced TR with NADPH and Sb(III), reported in this paper, disclose for the first time the molecular mechanism of action of antimonial drugs against the parasite. Sb(III), which is coordinated by the two redox-active catalytic cysteine residues (Cys52 and Cys57), one threonine residue (Thr335), and His461' of the 2-fold symmetry related subunit in the dimer, strongly inhibits TR activity. Because TR is essential for the parasite survival and virulence and it is absent in mammalian cells, these findings provide insights toward the design of new more affordable and less toxic drugs against Leishmaniasis.


    Organizational Affiliation

    Istituto di Biologia e Patologia MolecolariCNR and Department of Biochemical Sciences, Sapienza University of Roma, P.le A. Moro 5, 00185 Roma, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRYPANOTHIONE REDUCTASE
A, B
511Leishmania infantumGene Names: TRYR
EC: 1.8.1.12
Find proteins for A4HSF7 (Leishmania infantum)
Go to UniProtKB:  A4HSF7
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SB
Query on SB

Download SDF File 
Download CCD File 
A, B
ANTIMONY (III) ION
Sb
FAWGZAFXDJGWBB-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
FAD
Query on FAD

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Download CCD File 
A, B
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
NDP
Query on NDP

Download SDF File 
Download CCD File 
A, B
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.238 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 102.945α = 90.00
b = 102.945β = 90.00
c = 193.129γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-04-28
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance