| Assay Method Information | |
| | Wee-1 Biochemical Assay |
| Description: | In determination of the Weel kinase activity, a synthetic peptide, Poly(Lys,Tyr) Hydrobromide (Lys:Tyr (4:1)) bought from Sigma was used as the substrate. The amount of the reaction mixture was 21.1 μL; and the composition of the reaction buffer was 50 mM Tris-HCl buffer (pH 7.4)/10 mM magnesium chloride/1 mM dithiothreitol. The purified Weel kinase, 2.5 μg of the substrate peptide, 10 μM of non-labeled adenosine triphosphate (ATP) and 1 μCi of [γ-33P]-labeled ATP (2500 Ci/mmol or more) were added to it, and incubated at 30° C. for 30 minutes. Next, 10 μL of 350 mM phosphate buffer was added to the reaction mixture to stop the reaction. The substrate peptide was adsorbed by a P81 paper filter 96-well plate, then washed a few times with 130 mM phosphate buffer, and its radioactivity was counted with a liquid scintillation counter. The [γ-33P]-labeled ATP was bought from Amersham Bioscience. To add the test compound to the reaction system, the compound was diluted with dimethylsulfoxide (DMSO) to prepare a series of dilutions. 1.1 μL of each dilution was added to the reaction system. As a control, 1.1 μL of DMSO was added to the reaction system. Such assays, carried out with a range of doses of test compounds, allow the determination of the Wee1 IC50 of the compounds of the present invention. |
| Affinity data for this assay | |
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