Structure–Activity Relationships and Mechanism of Action of Small Molecule Smoothened Modulators Discovered by High-Throughput Screening and Rational Design

2014 ◽  
pp. 43-107 ◽  
Author(s):  
Fabrizio Manetti ◽  
Maurizio Taddei ◽  
Elena Petricci
Keyword(s):  
Small Molecule ◽  
High Throughput ◽  
Mechanism Of Action ◽  
High Throughput Screening ◽  
Rational Design ◽  
Structure Activity Relationships ◽  
Structure Activity

scholarly journals Identification of Small Molecule Modulators of Diguanylate Cyclase by FRET-based High-Throughput-Screening

2018 ◽  
Author(s):  
Matthias Christen ◽  
Cassandra Kamischke ◽  
Hemantha D. Kulasekara ◽  
Kathleen C. Olivas ◽  
Bridget R. Kulasekara ◽  
...  
Keyword(s):  
Small Molecules ◽  
Small Molecule ◽  
High Throughput ◽  
Biofilm Formation ◽  
High Throughput Screening ◽  
Diguanylate Cyclase ◽  
Chronic Infections ◽  
Structure Activity ◽  
Diguanylate Cyclases ◽  
Small Molecule Modulators

The bacterial second messenger cyclic diguanosine monophosphate (c-di-GMP) is a key regulator of cellular motility, the cell cycle, and biofilm formation with its resultant antibiotic tolerance, which may make chronic infections difficult to treat. Therefore, diguanylate cyclases, which regulate the spatiotemporal production of c-di-GMP, may be attractive drug targets to control biofilm formation that is part of chronic infections. In this paper, we present a FRET-based biochemical high-throughput screening approach coupled with detailed structure-activity studies to identify synthetic small molecule modulators of the diguanylate cyclase, DgcA, from Caulobacter crescentus. We identified a set of 7 small molecules that in the low µM range regulate DgcA enzymatic activity. Subsequent structure activity studies on selected scaffolds revealed a remarkable diversity of modulatory behaviors, including slight chemical substitutions that revert the effects from allosteric enzyme inhibition to activation. The compounds identified represent novel chemotypes and are potentially developable into chemical genetic tools for the dissection of c-di-GMP signaling networks and alteration of c-di-GMP associated phenotypes. In sum, our studies underline the importance for detailed mechanism of action studies for inhibitors of c-di-GMP signaling and demonstrate the complex interplay between synthetic small molecules and the regulatory mechanisms that control the activity of diguanylate cyclases.

Necrosulfonamide inhibits necroptosis by selectively targeting the mixed lineage kinase domain-like protein

MedChemComm ◽  
2014 ◽  
Vol 5 (3) ◽  
pp. 333-337 ◽  
Author(s):  
Daohong Liao ◽  
Liming Sun ◽  
Weilong Liu ◽  
Sudan He ◽  
Xiaodong Wang ◽  
...  
Keyword(s):  
Small Molecule ◽  
High Throughput ◽  
High Throughput Screening ◽  
Kinase Domain ◽  
Small Molecule Inhibitor ◽  
Mixed Lineage Kinase ◽  
Sar Studies ◽  
Structure Activity ◽  
Molecule Inhibitor ◽  
Smac Mimetic

Through high-throughput screening of 200 000 compounds and subsequent structure–activity relationship (SAR) studies we identified necrosulfonamide (NSA) as a potent small molecule inhibitor for necroptosis, induced by a combination of TNF-a, Smac mimetic, and z-VAD-fmk (T/S/Z).

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