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Assay Method Information |
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| | Biological Assays |
| Description: | To each well of a 384-well plate, 1 μL of test compounds in DMSO (final concentration ranging from 0.3 nM to 10 uM) were added into 20 μl of assay buffer (50 mM Tris pH 7.4/0.01% Tween-20/0.1 mg/ml bovine serum albumin/10 μM ferrous sulfate/1 mM sodium ascorbate/20 μg/ml catalase) containing 0.15 μg/ml FLAG-tagged full length PHD2 expressed in and purified from baculovirus-infected Sf9 cells. After a 5 min preincubation at room temperature, the enzymatic reactions were initiated by the addition of 4 μL of substrates {final concentrations of 0.2 μM 2-oxoglutarate and 0.5 μM HIF-1α peptide biotinyl-DLDLEMLAPYIPMDDDFQL (SEQ ID NO:1)}. After incubation for 45 minutes at room temperature, the reactions were terminated by the addition of a 25 μL quench/detection mix to a final concentration of 1 mM ortho-phenanthroline, 0.1 mM EDTA, 0.5 nM anti-(His)6 LANCE reagent (Perkin-Elmer Life Sciences), 100 nM AF647-labeled streptavidin (Invitrogen), and 2 μg/ml (His)6-VHL complex {S. Tan Protein Expr. Purif. 21, 224-234 (2001)} and the signals were developed for 30 minutes at room temperature. The ratio of time resolved fluorescence signals at 665 and 620 nm was determined, and percent inhibition was calculated relative to the high control samples (DMSO treated) run in parallel, after background subtraction. |
| Affinity data for this assay | |
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