title: Inhibition of a multiproduct terpene synthase from Medicago truncatula by 3-bromoprenyl diphosphates.
abstract: The multiproduct sesquiterpene synthase MtTPS5 from Medicago truncatula catalyzes the conversion of farnesyl diphosphate (FDP) into a complex mixture of 27 terpenoids. 3-Bromo substrate analogues of geranyl diphosphate (3-BrGDP) and farnesyl diphosphate (3-BrFDP) were evaluated as substrates of MTPS5 enzyme. Kinetic studies demonstrated that these compounds were highly potent competitive inhibitors of the MtTPS5 enzyme with fast binding and slow reversibility. Since there is a lack of knowledge about the crystal structure of multiproduct terpene synthases, these molecules might be ideal candidates for obtaining a co-crystal structure with multiproduct terpene synthases. Due to the structural and mechanistic similarity between various terpene synthases we expect these 3-bromo isoprenoids to be ideal probes for crystal structure studies.
authors: Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Strasse 8, D-07745 Jena, Germany. boland@ice.mpg.de.
authors: Abith
authors: A
authors: Vattekkatte
authors: Nathalie
authors: N
authors: Gatto
authors: Eva
authors: E
authors: Schulze
authors: Wolfgang
authors: W
authors: Brandt
authors: Wilhelm
authors: W
authors: Boland
mesh_terms: D019883:Alkyl and Aryl Transferases / Q000037:antagonists & inhibitors* / Q000737:chemistry; D001230:Aspergillus / Q000201:enzymology; D001667:Binding, Competitive; D020134:Catalytic Domain; D003460:Crystallization; D018360:Crystallography, X-Ray; D011756:Diphosphates / Q000737:chemistry*; D015195:Drug Design; D004791:Enzyme Inhibitors / Q000737:chemistry; D007535:Isomerases / Q000737:chemistry; D007700:Kinetics; D046913:Medicago truncatula / Q000737:chemistry*; D008968:Molecular Conformation; D010710:Phosphates / Q000138:chemical synthesis* / Q000737:chemistry; D011106:Polyisoprenyl Phosphates / Q000737:chemistry; D054876:Prenylation; D012717:Sesquiterpenes / Q000737:chemistry; D013379:Substrate Specificity; D013729:Terpenes / Q000737:chemistry*
chemical_list: D011756:Diphosphates; D004791:Enzyme Inhibitors; D010710:Phosphates; D011106:Polyisoprenyl Phosphates; D012717:Sesquiterpenes; D013729:Terpenes; C004808:farnesyl pyrophosphate; D019883:Alkyl and Aryl Transferases; C108877:terpene synthase; D007535:Isomerases; C060050:aristolochene synthase