| Assay Method Information | |
| | Ras-SOS Interaction Assay |
| Description: | The assay buffer can contain 5 mM HEPES pH 7.4, 150 mM NaCl, 10 mM EDTA, 1 mM DTT, 0.05% BSA, 0.0025% (v/v) Igepal and 100 mM KF. A Ras working solution is prepared in assay buffer containing typically 10 nM of the protein construct (e.g., GST-tagged hK-Ras G12C) and 2 nM of the FRET donor (e.g., antiGST-Eu(K) from Cisbio, France). A SOS1 working solution is prepared in assay buffer containing typically 10 nM of the protein construct (e.g., His-hSOS1) and 10 nM of the FRET acceptor (e.g., anti-6His-XL665 from Cisbio, France). An inhibitor control solution is prepared in assay buffer containing 10 nM of the FRET acceptor without the SOS1 protein. A fixed reaction mixture with or without test compound is transferred into a 384-well plate. Ras working solution is added to all wells of the test plate. SOS1 working solution is added to all wells except for those that are subsequently filled with the inhibitor control solution. After approximately 60 min incubation, the fluorescence is measured with a M1000Pro plate reader (Tecan) using HTRF detection (excitation 337 nm, emission 1: 620 nm, emission 2: 665 nm). |
| Affinity data for this assay | |
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