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BioAssay: AID 694011

Inhibition of human mitochondrial MetRS aminoacylation activity assessed as reduction in [3H]methionine incorporation into Escherichia coli tRNA pre-incubated for 15 mins before tRNA addition and measured after 120 mins by scintillation counting

Urea-based methionyl-tRNA synthetase inhibitors were designed, synthesized, and evaluated for their potential toward treating human African trypanosomiasis (HAT). With the aid of a homology model and a structure-activity-relationship approach, low nM inhibitors were discovered that show high selectivity toward the parasite enzyme over the closest human homologue. These compounds inhibit parasite more ..
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 Tested Compounds
 Tested Compounds
All(8)
 
 
Active(7)
 
 
Unspecified(1)
 
 
 Tested Substances
 Tested Substances
All(8)
 
 
Active(7)
 
 
Unspecified(1)
 
 
AID: 694011
Data Source: ChEMBL (854755)
BioAssay Type: Confirmatory, Concentration-Response Relationship Observed
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2013-06-29
Modify Date: 2014-08-23

Data Table ( Complete ):           View Active Data    View All Data
Target
Sequence: RecName: Full=Methionine--tRNA ligase, cytoplasmic; AltName: Full=Methionyl-tRNA synthetase; Short=MetRS
Description ..   
Protein Family: catalytic core domain of methioninyl-tRNA synthetases
Comment ..   

Gene:MARS     Related Protein 3D Structures     More BioActivity Data..
BioActive Compounds: 7
Description:
Title: Urea-based inhibitors of Trypanosoma brucei methionyl-tRNA synthetase: selectivity and in vivo characterization.

Abstract: Urea-based methionyl-tRNA synthetase inhibitors were designed, synthesized, and evaluated for their potential toward treating human African trypanosomiasis (HAT). With the aid of a homology model and a structure-activity-relationship approach, low nM inhibitors were discovered that show high selectivity toward the parasite enzyme over the closest human homologue. These compounds inhibit parasite growth with EC(50) values as low as 0.15 muM while having low toxicity to mammalian cells. Two compounds (2 and 26) showed excellent membrane permeation in the MDR1-MDCKII model and encouraging oral pharmacokinetic properties in mice. Compound 2 was confirmed to enter the CNS in mice. Compound 26 had modest suppressive activity against Trpanosoma brucei rhodesiense in the mouse model, suggesting that more potent analogues or compounds with higher exposures need to be developed. The urea-based inhibitors are thus a promising starting point for further optimization toward the discovery of orally available and CNS active drugs to treat HAT.
(PMID: 22720744)
Comment
Compounds with activity <= 50uM or explicitly reported as active by ChEMBL are flagged as active in this PubChem assay presentation.
Categorized Comment - additional comments and annotations
From BioAssay Depositor:
Assay Type: Binding
Target Type: Target is a single protein chain
Assay Data Source: Scientific Literature
Result Definitions
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TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1IC50*IC50 PubChem standard valueFloatμM
3BEIBinding Efficiency Index(nM)Float
2SEISurface Efficiency Index(nM)Float
4LELigand EfficiencyFloat
5LLELipophilic Ligand EfficiencyFloat
6IC50 activity commentIC50 activity commentString
7IC50 standard flagIC50 standard flagInteger
8IC50 qualifierIC50 qualifierString
9IC50 published valueIC50 published valueFloatnM
10IC50 standard valueIC50 standard valueFloatnM

* Activity Concentration.

Data Table (Concise)
Data Table ( Complete ):     View Active Data    View All Data
Classification
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