title: Crystal structure of the catalytic domains of adenylyl cyclase in a complex with Gsalpha.GTPgammaS.
abstract: The crystal structure of a soluble, catalytically active form of adenylyl cyclase in a complex with its stimulatory heterotrimeric G protein alpha subunit (Gsalpha) and forskolin was determined to a resolution of 2.3 angstroms. When P-site inhibitors were soaked into native crystals of the complex, the active site of adenylyl cyclase was located and structural elements important for substrate recognition and catalysis were identified. On the basis of these and other structures, a molecular mechanism is proposed for the activation of adenylyl cyclase by Gsalpha.
authors.affiliation: Howard Hughes Medical Institute and Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75235-9050, USA.
authors.forename: J J
authors.initials: JJ
authors.lastname: Tesmer
authors.forename: R K
authors.initials: RK
authors.lastname: Sunahara
authors.forename: A G
authors.initials: AG
authors.lastname: Gilman
authors.forename: S R
authors.initials: SR
authors.lastname: Sprang
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000067956:Adenylyl Cyclase Inhibitors; D000262:Adenylyl Cyclases / Q000737:chemistry* / Q000378:metabolism; D000595:Amino Acid Sequence; D001665:Binding Sites; D002384:Catalysis; D005576:Colforsin / Q000378:metabolism; D003460:Crystallization; D018360:Crystallography, X-Ray; D019281:Dimerization; D004789:Enzyme Activation; D019205:GTP-Binding Protein alpha Subunits, Gs / Q000737:chemistry* / Q000378:metabolism; D016244:Guanosine 5'-O-(3-Thiotriphosphate) / Q000737:chemistry* / Q000378:metabolism; D008024:Ligands; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009154:Mutation; D010766:Phosphorylation; D011487:Protein Conformation; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary
chemical_list: D000067956:Adenylyl Cyclase Inhibitors; D008024:Ligands; D005576:Colforsin; D016244:Guanosine 5'-O-(3-Thiotriphosphate); D000255:Adenosine Triphosphate; D019205:GTP-Binding Protein alpha Subunits, Gs; D000262:Adenylyl Cyclases