| Assay Method Information | |
| | SIK2, SIK1, SIK3, Abl, Scr, and EPHA2 Kinase Assay |
| Description: | SIK2, SIK1, SIK3, Abl, Scr, and EPHA2 assays were performed using an IMAP fluorescence polarization assay format (Molecular Devices Inc.). 06-13nM of each kinase (Life technologies) was incubated for 60 min at room temperature with 100nM of either FAM-Abltide, FAM-Strctide or FAM-HDAC protein derived peptide (synthesized by Alta Biosciences, Birmingham UK). Assays were carried out in the presence of 50 or 100 uM ATP in either 20 nM Tris bufer (pH 7.2) containing 4nM MgCl2, 0.2% BSA and 2 mM DTT (SIK2, SIK1, SIK3, Abl, Scr); or 20 mM Tris buffer (pH 8.5) containing 20mM MgCCl2, 0.5% BSA, 0.2% Triton and 5 nM DTT (EPHA2). Typically, dose response analyses were performed over concentration rangges from 0.00005-1 uM. reactions were stopped by adding 2 assay volumes of 0.25% (v/v) IMAP binding reagent in either an 85:15 ratio (SIK2, SIK1, SIK3, Abl, Scr, EPHA2) or 30:70 ratio (Src) of IMAP binding buffers A and B (Molecular Devices). After incubation to allow the detection reagents to bind to the phosphorylated peptide, fluorescence polarization was measured on a Tecan infinite plate reader at excitation (470 nm) and emission (50 nm) wavelengths. Inhibition was calculated using no inhibition and no enzyme controls at 0 and 100% inhibition, respectively. |
| Affinity data for this assay | |
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