| Solution Information | help | |
| Enzyme: | Sphingosine 1-phosphate receptor 4 | |
| inhibitor: | BDBM79485 | |
| substrate: | n/a | |
| Solution Type: | Aqueous | |
| pH at Preparation: | n/a | |
| Temp. Prep.: | n/a | |
| Comments: | Assay Overview: The purpose of this assay is to confirm S1P4 agonist dose response from powder samples. This assay uses Tango S1P4-BLA U2OS cells which contain the human Endothelial Differentiation Gene 6 (EDG6; S1P4) linked to a GAL4-VP16 transcription factor via a TEV protease site. The cells also express a beta-arrestin/TEV protease fusion protein and a beta-lactamase (BLA) reporter gene under the control of a UAS response element. Stimulation of the S1P4 receptor by agonist causes migration of the fusion protein to the GPCR, and through proteolysis liberates GAL4-VP16 from the receptor. The liberated VP16-GAL4 migrates to the nucleus, where it induces transcription of the BLA gene. BLA expression is monitored by measuring fluorescence resonance energy transfer (FRET) of a cleavable, fluorogenic, cell-permeable BLA substrate. As designed, test compounds that act as S1P4 agonists will activate S1P4 and increase well FRET. Compounds were tested in triplicate using a 10-point, 1:3 di | |
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