Assay Method Information
Assay Name:  Inhibitory Activity Test of the Compounds on ALK2
Description:  ALK2 Kinase Enzyme System kit from Promega was used for the test. Reagents for kinase test was prepared first, the reagents comprising: {circle around (1)}4×Kinase buffer 250 μL (containing 200 μM DTT); {circle around (2)}5×Inhibitor mother liquor, i.e., the test compound was prepared into 10 mM mother liquor with DMSO, and the test compound was diluted into 5 mM (20 μL of 10 mM test compound mother liquor+20 μL of DMSO dissolved) with DMSO; {circle around (3)}1×Kinase buffer (containing 1% DMSO) 200 μL; {circle around (4)}1×Kinase buffer 40 μL; @Kinase solution 115 μL; {circle around (6)}Substrate Mix (containing 65 μM ATP) 120 μL. The inhibitor working solution was then prepared, i.e., the test compound was prepared into 5 mM mother liquor with DMSO, 1 μL of 5 mM mother liquor was taken and was diluted into the concentration of 50000 nM by adding 99 μL 1×Kinase buffer; 20 μL of the solution of this concentration was taken, and 80 μL of 1×Kinase buffer (containing 1% DMSO) was added thereto to obtain the concentration of 10000 nM, 5 times dilution was carried out in this way, and a total of 6 concentration gradients were provided. 1 μL of the compound at each concentration was taken and added to a 384-well plate, and then 2 μL Kinase solution (160 mM Tris, 7.5; 80 mM MgCl2; 0.4 mg/ml BSA; 200 μM DTT; ALK2 kinase) was added to each well, and the plate was centrifuged at 1000 rpm for 20 seconds at room temperature, incubated for 30 minutes at 25° C.; then 2 μL of a mixture containing ATP and kinase substrate was added to each well, the plate was centrifuged at 1000 rpm for 20 seconds at room temperature, and incubated at 25° C. for 120 minutes. Then 5 μL of ADP-Glo™ reagent was added to each well, and the plate was incubated at 25° C. for 40 minutes; then 10 μL of Kinase Detection Reagent was added to each well, the plate was incubated at 25° C. for 30 minutes and then was tested; a microplate reader was used to record the chemiluminescence value, the curve was fitted with Origin 7.5, the IC50 (nM) value of the test substance on the ALK2 kinase activity was calculated.
Affinity data for this assay
 
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