Protein involved in G protein-coupled receptor mediated signal transduction with ability to mediate signal transduction from a dopamine D1 receptor or an adenosine A2A receptor to an adenylate cyclase and utilization thereof

摘要

A novel protein (Gm1) includes an amino acid sequence part having a high homology with a domain having a high homology with a GTP binding site and a GTPase site conserved among G protein α subunits and a trimer forming domain conserved among G protein α subunits. The Gm1 protein is involved in signal transduction via a G protein-coupled receptor (GPCR) stimulation. The Gm1 protein is expressed intensively in human brain, thymus, testes, spleen, small intestine, uterus and heart. A method for screening for a substance capable of regulating a cellular signal transduction employs a polynucleotide encoding the Gm1 protein.