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Assay Method Information |
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| | Human VPS34 Enzyme Assay |
| Description: | 100 nL compounds in DMSO are added to wells of a 384 well microtitre plate (Greiner 780076). At room temperature: 5 ul VPS34 reaction buffer (Invitrogen Assay Buffer Q (diluted 1 in 5 with nanopure water) plus 2 mM DTT and 2 mM MnCl2) containing ATP (20 uM, Promega) and 200 uM PI-PS substrate (Invitrogen PV5122) is added followed immediately by 5 ul VPS34 reaction buffer (as above) containing VPS34 (5 nM, Millennium Protein Sciences Group) and the mixture is incubated with shaking at room temperature for 1 hour. Then 5 ul VPS34 stop-detect mix (as per Invitrogen Adapta Assay kit (PV5009) instructions (contains kinase quench buffer, TR-FRET buffer, Adapta Eu anti-ADP antibody and Alexa Fluor 647 ADP tracer)) is added to quench the reaction. The plates are then incubated for 30 minutes at room temperature with shaking and then read on a BMG PheraStar Plus reader.For the assay methods described above, test compound percent inhibition, at various concentrations, is calculated relative to control (DMSO and EDTA) treated samples. Compound concentration versus percent inhibition curves are fitted to generate IC50 values. One skilled in the art will appreciate that the values generated either as percentage inhibition at a single concentration or IC50 values are subject to experimental variation. |
| Affinity data for this assay | |
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