Assay Method Information

Assay Name:  Menin-MLL Competition Assay
Description:  For IC50 determination test compounds were prepared as 10 mM DMSO stock solutions. Considering DMSO as the vehicle in the assay system. Lower sub-stocks of 50 μM were prepared from the 10 mM stock solution. To test the compounds in assay, 3.16-fold serial dilutions are made in 100% DMSO. Mid-stock of 50× compounds (50 μM) were serially diluted (3.16 fold) in 100% DMSO in Polypropylene plate. In assay plate 1 micro-litre of the previously prepared compound dilution was stamped. H-FL-Menin diluted to 4 nM in assay buffer (50 mM Tris-HCl, pH 7.4, 50 mM NaCl, freshly prepared 1 mM DTT, 0.01% BSA, 0.005% Triton X-100) was pre-incubated with 8 nM anti-His6-Tb for 30 min at room temperature. FITC-MLL-4-43 was diluted to 2 nM in assay buffer and 25 μL was dispensed into each well of the assay plate followed by addition of 25 μl of pre-incubated H-FL-Menin and anti-His6-Tb mixture. Final concentration H-FL-Menin diluted to 1 nM in assay plate with 2 nM anti-His6-Tb and 1 nM FITC-MLL-4-43. After 1 hr incubation at room temperature, the HTRF signal was measured on the Spark multi-label plate reader. Resulting data were captured as a ratio of RFU520/RFU485×1000. The max values were obtained from 0% inhibition in presence of 2% DMSO and the min. values were 100% inhibition in presence of 1 μM reference compound.
Affinity data for this assay
 

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