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| | CDK19/Cyclin C Binding Assay |
| Description: | The binding assay relies on the LanthaScreen Eu-Kinase Binding Assay (Invitrogen). This is a kinase assay platform based on measuring the binding and displacement of an Alexa Fluor 647 conjugate of an ATP-competitive kinase inhibitor (Kinase Tracer 236, PV5592) at a kinase active site. Binding of the tracer to the kinase is detected by addition of a europium (Eu)-labelled anti-His antibody (Invitrogen PV 5596), which specifically labels the kinase of interest. This binding results in a high degree of fluorescence resonance energy transfer (FRET), whereas displacement of the tracer with a kinase inhibitor results in a loss of FRET.The enzyme has been purchase from Prokinase (1384-0390-1) as a dimer of GST-His-CDK19 and His-Cyclin C recombinant human proteins.Assay conditions were as indicated by the kit manufacturers with the following adaptations:Assay buffer: 50 mM HEPES, pH 7.5, 1 mM EGTA, 0.01% Brij-35, 10 mM MgCl2Assay volume: 20 μlIncubation time and temperature: 60 min at 25° C.Cdk19-Cyclin C concentration: 2 nMTracer concentration: 20 nM(Eu)-labelled anti-GST antibody concentration: 2 nMTested compound: Serial 1:3 dilutionsFinal DMSO concentration in the assay: 1%Assays were performed in 384-well plates. The final read out was generated using an EnVision plate reader (Perkin-Elmer). The emission ratio was calculated by dividing the acceptor/tracer emission (665 nm) by the antibody/donor emission (615 nm). |
| Affinity data for this assay | |
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