| 摘要 |
High-Throughput Screening (HTS) of large compound libraries is the method of choice for discovery of lead compounds for drug development. The present invention provides novel, sensitive and broadly applicable NMR screening methods in which the H8 signal of a purine-containing substrate or product, or the H6 signal of a pyrimidine-containing substrate or product, is used to monitor enzymic reactions that utilize such substrates. Experiments can be performed in real time or in an endpoint assay format using protein and substrate concentrations comparable to the ones used by other HTS techniques. Application of the NMR method to the assay of the enzymes creatine kinase and phosphodiesterase 2A is presented. The methods are applicable to any of a multitude of enzymes that utilize purine nucleoside substrates (e.g. ATP, GTP) or pyrimidine nucleoside substrates (e.g. CTP, UDP-GlcNac), including protein kinases, GTPases, and lipid kinases. |
