| Assay Method Information | |
| | Scintillation Proximity Assay |
| Description: | In the present assay, the activity of the test substances on human full-length PDE2A3 enzyme was determined using the [3H]-cGMP scintillation proximity assay (SPA) modified from the Amersham TRKQ7100 instructions (GE Healthcare, Arlington Heights, Ill., USA). PDE2A3 protein was obtained from FLAG purification of sf21 insect cells using standard affinity purification procedures for this tag (anti-FLAG M2, Sigma Aldrich, St. Louis, Mo., USA). Briefly, the SPA assays were performed using PDE SPA yttrium silicate beads (Perkin Elmer RPNQ0024; PerkinElmer, Inc., Waltham, Mass., USA) which bind preferentially to the linear nucleotide, GMP, compared to the cyclic nucleotide, cGMP. The, 3H-GMP product was detected using a Wallac MicroBeta scintillation counter. The reaction time was chosen with respect to the amount of time in which 10-20% of substrate was hydrolyzed by the enzyme. The assay was validated using PDE2-selective literature compounds. |
| Affinity data for this assay | |
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