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Assay Method Information

Assay Name:  LSD1 Inhibitory Assay
Description:  A test compound dissolved in DMSO was added by to a reaction solution (50 mM Tris-HCl (pH 8.0), 0.1% BSA, 1 mM DTT) containing LSD1 enzyme, and the mixture was reacted at room temperature for 60 min. Biotin-histone H3 mono methylated K4 peptide solution (NH2-ART(me-K)QTARKSTGGKAPRKQLAGGK(Biotin)-CONH2) was added to start the reaction. After reaction at room temperature for 5 min, 2-PCPA solution was added to terminate the reaction. A detection solution (800 mM potassium fluoride, 0.1% BSA) containing europium-labeled anti-histone H3 antibody (Wako Pure Chemical Industries, Ltd.) and Streptavidin-XL665 (Cisbio) was further added, and the mixture was left standing for 60 min. A time-resolved fluorescence (excitation 320 nm, emission 615 nm, 665 nm) was measured by Envision (PerkinElmer). The LSD1 inhibitory rate (%) of the test compound was calculated by the following formula. inhibitory rate (%)=(1−(test compound count−blank) (control−blank))100The count of the LSD1 enzyme reaction mixture under compound non-addition conditions is indicated as control, and the count under compound non-addition and LSD1 enzyme non-addition conditions is indicated as blank. A concentration necessary for achieving 50% inhibitory rate was taken as IC50 value.
Affinity data for this assay
 

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Last update November 1, 2007
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