Abstract
Fungal cell wall synthesis is essential for viability, requiring the activity of genes involved in environmental sensing, precursor synthesis, transport, secretion, and assembly. This multitude of potential targets, the availability of known agents targeting this pathway, and the unique nature of fungal cell wall synthesis make this pathway an appealing target for drug discovery. Here we describe the adaptation of an assay monitoring cell wall synthesis for high-throughput screening. The assay requires fungal cell growth, in the presence of the test compound, for 3 h before the cells are subjected to osmotic shock in the presence of a dye that stains DNA. Miniaturization of the assay to a 384-well plate format and removing a mechanical transfer led to subtle changes in the assay characteristics. Validation of the assay with a library of known pharmacologically active agents has identified a number of different classes of compounds that are active in this assay, causing aberrant cell wall morphology and in many cases the inhibition of fungal cell growth.
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