Inhibition of bacterial virulence: drug-like molecules targeting the Salmonella enterica PhoP response regulator.

Chemical Biology & Drug Design
Yat T TangGarland R Marshall

Abstract

Two-component signal transduction (TCST) is the predominant signaling scheme used in bacteria to sense and respond to environmental changes in order to survive and thrive. A typical TCST system consists of a sensor histidine kinase to detect external signals and an effector response regulator to respond to external changes. In the signaling scheme, the histidine kinase phosphorylates and activates the response regulator, which functions as a transcription factor to modulate gene expression. One promising strategy toward antibacterial development is to target TCST regulatory systems, specifically the response regulators to disrupt the expression of genes important for virulence. In Salmonella enterica, the PhoQ/PhoP signal transduction system is used to sense and respond to low magnesium levels and regulates the expression for over 40 genes necessary for growth under these conditions, and more interestingly, genes that are important for virulence. In this study, a hybrid approach coupling computational and experimental methods was applied to identify drug-like compounds to target the PhoP response regulator. A computational approach of structure-based virtual screening combined with a series of biochemical and biophysical assays...Continue Reading

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Methods Mentioned

BETA
X-ray
FRET
electrophoretic
electrophoresis
PCR
NMR

Software Mentioned

Score
ImageJ
sybyl
OpenEye
fred
EMSA
OEChemScore
ChemScore
uto D ock Tools ( ADT )
A D ock

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