| Assay Method Information | |
| | Protein Kinase Assay Condition B (Thiol-Free Conditions) |
| Description: | A radiometric protein kinase assay (33PanQinase Activity Assay) was used for measuring the kinase activity of the protein kinase. All kinase assays were performed in 96-well FlashPlates from PerkinElmer (Boston, Mass., USA) in a 50 microliter reaction volume. The reaction cocktail was pipetted in four steps in the following order: 20 microliter of assay buffer (standard buffer) 5 microliter of ATP solution (in H2O) 5 microliter of test compound (in 10% DMSO) 20 microliter enzyme/substrate mix. Each assay for the protein kinase contained 70 mM HEPES-NaOH pH 7.5, 3 mM MgCl2, 3 mM MnCl2, 3 microM Na-orthovanadate, 1 mM TCEP, 50 μg/ml PEG20000, ATP (corresponding to the apparent ATP-Km of the kinase, see Table A), [gamma-33P]-ATP (approx. 6×10×E5 cpm per well), with the protein kinase and relevant substrate being used in pre-determined amounts, depending on the kinase in question. For all experiments labeled as Thiol-free , all glutathione was exchanged from protein preparations so as to be removed from the assay and final buffer conditions contained no thiol-containing reagents. In addition, the DTT in the thiol-containing assays is replaced by TCEP in the thiol-free assays and all enzymes and substrates are produced under thiol-free conditions for the thiol-free assays. |
| Affinity data for this assay | |
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