PMID- 26179037 OWN - NLM STAT- MEDLINE DCOM- 20160406 LR - 20161125 IS - 1940-6029 (Electronic) IS - 1064-3745 (Linking) VI - 1322 DP - 2015 TI - Evaluating the Activity of Smoothened Toward G Proteins Using [(3)(5)S]Guanosine 5'-(3-O-thio)triphosphate ([(3)(5)S]GTPgammaS). PG - 35-44 LID - 10.1007/978-1-4939-2772-2_4 [doi] AB - The utilization of heterotrimeric G protein, and in particular those of the Gi, family, by Hedgehogs through Smoothened has become increasingly clear. We describe here a method for evaluating the activity of Smoothened toward G proteins in membranes derived from human embryonic kidney-293 (HEK293) cells. The assay relies on receptor-promoted exchange of GDP for [(35)S]GTPgammaS on the Galpha subunit. The assay is best suited for analysis of the constitutive activity of Smoothened, inverse agonism superimposed on this activity, and neutral antagonism superimposed on inverse agonism. The assay would also be suitable for several other applications requiring a proximal, quantifiable readout of Smoothened activity. FAU - Manning, David R AU - Manning DR AD - Department of Pharmacology, Perelman School of Medicine, University of Pennsylvania, 3620 Hamilton Walk, Pennsylvania, PA, 19104-6084, USA, manning@mail.med.upenn.edu. FAU - Shen, Feng AU - Shen F FAU - Riobo, Natalia A AU - Riobo NA LA - eng GR - R01 GM080396/GM/NIGMS NIH HHS/United States GR - GM080396/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 RN - 0 (Receptors, G-Protein-Coupled) RN - 0 (SMO protein, human) RN - 0 (Smoothened Receptor) RN - 0 (Sulfur Radioisotopes) RN - 37589-80-3 (Guanosine 5'-O-(3-Thiotriphosphate)) RN - EC 3.6.1.- (GTP-Binding Proteins) SB - IM MH - GTP-Binding Proteins/chemistry/*metabolism MH - *Guanosine 5'-O-(3-Thiotriphosphate)/chemistry MH - HEK293 Cells MH - Humans MH - Immunoprecipitation/methods MH - Protein Binding MH - Receptors, G-Protein-Coupled/chemistry/*metabolism MH - Smoothened Receptor MH - Sulfur Radioisotopes/chemistry EDAT- 2015/07/17 06:00 MHDA- 2016/04/07 06:00 CRDT- 2015/07/17 06:00 PHST- 2015/07/17 06:00 [entrez] PHST- 2015/07/17 06:00 [pubmed] PHST- 2016/04/07 06:00 [medline] AID - 10.1007/978-1-4939-2772-2_4 [doi] PST - ppublish SO - Methods Mol Biol. 2015;1322:35-44. doi: 10.1007/978-1-4939-2772-2_4.