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Assay Method Information

Assay Name:  Absorbance Microorganism-Based Dose Response HTS to Identify Inhibitors of Streptokinase Expression
Description:  Keywords: Group A streptococcus, GAS, streptokinase, expression, virulence, inhibition, dose response, EC50 Assay Overview: The goal of this assay is to identify compounds that specifically reduce streptokinase expression without inhibiting cell growth. Active compounds from the primary screen were tested in 6-point, 3-fold dilution doses with starting concentration at 15 uM as follows. GAS UMAA2166 at OD600 equal to 0.015 were plated onto 384-well plates (Corning 3570) and incubated with test compounds in Todd-Hewitt Broth medium supplemented with 100 ug/ml of streptomycin for 6 hours before cells were pelleted. Supernatant of cells was removed and tested for SK activity by measuring activation of plasminogen in an absorbance-based assay as described in the Protocol section. Cell pellets were assayed for viability by BacTiterGlo reagent (Promega G8233). Normalized SK activity values were generated by dividing values of SK activity by the values of viability reading, and used
Affinity data for this assay
 

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Last update November 1, 2007
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