6GD4

Trypanosoma brucei PTR1 in complex with inhibitor 4c (F188)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.42 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.174 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Enhancement of Benzothiazoles as Pteridine Reductase-1 Inhibitors for the Treatment of Trypanosomatidic Infections.

Linciano, P.Pozzi, C.Iacono, L.D.di Pisa, F.Landi, G.Bonucci, A.Gul, S.Kuzikov, M.Ellinger, B.Witt, G.Santarem, N.Baptista, C.Franco, C.Moraes, C.B.Muller, W.Wittig, U.Luciani, R.Sesenna, A.Quotadamo, A.Ferrari, S.Pohner, I.Cordeiro-da-Silva, A.Mangani, S.Costantino, L.Costi, M.P.

(2019) J Med Chem 62: 3989-4012

  • DOI: 10.1021/acs.jmedchem.8b02021
  • Primary Citation of Related Structures:  
    6GCK, 6GCL, 6GD0, 6GCQ, 6GCP, 6GDP, 6GDO, 6GD4, 6GEY, 6GEX

  • PubMed Abstract: 
  • 2-Amino-benzo[ d]thiazole was identified as a new scaffold for the development of improved pteridine reductase-1 (PTR1) inhibitors and anti-trypanosomatidic agents. Molecular docking and crystallography guided the design and synthesis of 42 new benzothiazoles ...

    2-Amino-benzo[ d]thiazole was identified as a new scaffold for the development of improved pteridine reductase-1 (PTR1) inhibitors and anti-trypanosomatidic agents. Molecular docking and crystallography guided the design and synthesis of 42 new benzothiazoles. The compounds were assessed for Trypanosoma brucei and Leishmania major PTR1 inhibition and in vitro activity against T. brucei and amastigote Leishmania infantum. We identified several 2-amino-benzo[ d]thiazoles with improved enzymatic activity ( TbPTR1 IC 50 = 0.35 μM; LmPTR1 IC 50 = 1.9 μM) and low μM antiparasitic activity against T. brucei. The ten most active compounds against TbPTR1 were able to potentiate the antiparasitic activity of methotrexate when evaluated in combination against T. brucei, with a potentiating index between 1.2 and 2.7. The compound library was profiled for early ADME toxicity, and 2-amino- N-benzylbenzo[ d]thiazole-6-carboxamide (4c) was finally identified as a novel potent, safe, and selective anti-trypanocydal agent (EC 50 = 7.0 μM). Formulation of 4c with hydroxypropyl-β-cyclodextrin yielded good oral bioavailability, encouraging progression to in vivo studies.


    Organizational Affiliation

    Dipartimento di Scienze della Vita , University of Modena and Reggio Emilia , Via Campi 103 , 41125 Modena , Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Pteridine reductaseA, B, C, D288Trypanosoma brucei bruceiMutation(s): 0 
Gene Names: PTR1
UniProt
Find proteins for O76290 (Trypanosoma brucei brucei)
Explore O76290 
Go to UniProtKB:  O76290
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAP (Subject of Investigation/LOI)
Query on NAP

Download Ideal Coordinates CCD File 
E [auth A], H [auth B], K [auth C], O [auth D]NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
6KT (Subject of Investigation/LOI)
Query on 6KT

Download Ideal Coordinates CCD File 
F [auth A], I [auth B], L [auth C], P [auth D]2-amino-1,3-benzothiazole-6-carboxamide
C8 H7 N3 O S
HPRLVAQRFQEQPF-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
M [auth C], N [auth C]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
G [auth A], J [auth B]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSX
Query on CSX
A, B, C, DL-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.42 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.174 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.72α = 90
b = 90.41β = 115.62
c = 82.89γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Commission603240

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-03
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Data collection, Database references
  • Version 1.2: 2019-05-08
    Changes: Data collection, Database references