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| | Biochemical Assay |
| Description: | Compounds of the present invention were evaluated for potency against mTOR using an in vitro kinase assay. mTOR activity is measured in vitro by determining the level of phosphorylation of the protein substrate 4EBP-1. The phosphorylation of GFP-4E-BP1 at tyrosine residue is recognized by Ab Tb-anti-p4E-BP1, which results in time-resolved fluorescence resonance energy transfer (TR-FRET) between GFP and terbium in the Ab--product complex. Recombinant mTOR kinase domain, GFP-4E-BP1, and Lantha Ab Tb-anti-p4E-BP1, and TR-FRET dilution buffer were from Invitrogen. All other reagents were from Sigma. All assays were performed in a Corning white 384-well non-binding surface plate using Safire2 plate reader (TECAN) at room temperature. The assay buffer contained 50 mM HEPES pH 7.5, 0.01% polysorbate, 1 mM EGTA and 10 mM MnCl2. To the assay plate, substrate GFP-4E-BP-1 and mTOR in the assay buffer were mixed first and the reaction was initiated by addition of ATP. |
| Affinity data for this assay | |
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