6BU7

Crystal structure of Trypanothione Reductase from Trypanosoma brucei in complex with inhibitor RD130 1-[2-(Piperidin-4-yl)ethyl]-5-{5-[1-(pyrrolidin-1-yl)cyclohexyl]-1,3-thiazol-2-yl}-1H-indole


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.73 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Biological Evaluation and X-ray Co-crystal Structures of Cyclohexylpyrrolidine Ligands for Trypanothione Reductase, an Enzyme from the Redox Metabolism of Trypanosoma.

De Gasparo, R.Brodbeck-Persch, E.Bryson, S.Hentzen, N.B.Kaiser, M.Pai, E.F.Krauth-Siegel, R.L.Diederich, F.

(2018) ChemMedChem 13: 957-967

  • DOI: https://doi.org/10.1002/cmdc.201800067
  • Primary Citation of Related Structures:  
    6BTL, 6BU7

  • PubMed Abstract: 

    The tropical diseases human African trypanosomiasis, Chagas disease, and the various forms of leishmaniasis are caused by parasites of the family of trypanosomatids. These protozoa possess a unique redox metabolism based on trypanothione and trypanothione reductase (TR), making TR a promising drug target. We report the optimization of properties and potency of cyclohexylpyrrolidine inhibitors of TR by structure-based design. The best inhibitors were freely soluble and showed competitive inhibition constants (K i ) against Trypanosoma (T.) brucei TR and T. cruzi TR and in vitro activities (half-maximal inhibitory concentration, IC 50 ) against these parasites in the low micromolar range, with high selectivity against human glutathione reductase. X-ray co-crystal structures confirmed the binding of the ligands to the hydrophobic wall of the "mepacrine binding site" with the new, solubility-providing vectors oriented toward the surface of the large active site.


  • Organizational Affiliation

    Laboratorium für Organische Chemie, ETH Zürich, Vladimir-Prelog-Weg 3, 8093, Zürich, Switzerland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Trypanothione reductase
A, B
495Trypanosoma brucei brucei TREU927Mutation(s): 0 
Gene Names: Tb10.406.0520
EC: 1.8.1.12
UniProt
Find proteins for Q389T8 (Trypanosoma brucei brucei (strain 927/4 GUTat10.1))
Explore Q389T8 
Go to UniProtKB:  Q389T8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ389T8
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download Ideal Coordinates CCD File 
C [auth A],
I [auth B]
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
RD0 (Subject of Investigation/LOI)
Query on RD0

Download Ideal Coordinates CCD File 
G [auth A],
L [auth B]
1-[2-(piperidin-4-yl)ethyl]-5-{5-[1-(pyrrolidin-1-yl)cyclohexyl]-1,3-thiazol-2-yl}-1H-indole
C28 H38 N4 S
KBPMYBYNCAAYSC-UHFFFAOYSA-N
EPE
Query on EPE

Download Ideal Coordinates CCD File 
K [auth B],
M [auth B]
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
F [auth A],
H [auth A],
J [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
GOL
Query on GOL

Download Ideal Coordinates CCD File 
N [auth B],
O [auth B],
P [auth B],
Q [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.73 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.283α = 90
b = 117.283β = 90
c = 224.535γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
autoPROCdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Natural Sciences and Engineering Research Council (NSERC, Canada)CanadaRGPIN-2015-04877
Canada Research ChairsCanada--
ETH Research CouncilSwitzerlandETH-01 13-2
German Research Foundation (DFG)GermanyKR-1242/8-1

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-06
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2020-01-08
    Changes: Author supporting evidence
  • Version 1.3: 2023-10-04
    Changes: Data collection, Database references, Refinement description