Off-target activities of target compounds can become costly if they aren’t discovered until late in the drug research and discovery process. Therefore, knowing the inhibitory profile of your test compounds across a broad collection of kinases as quickly as possible is highly desirable.
However, screening against many kinases at once requires a universal platform that is still sensitive enough to detect inhibitor activity and assess selectivity and potency on kinases of different classes. The luminescent ADP-Glo™ Kinase Assay is a universal platform that measures kinase activity by quantifying the amount of ADP produced during a kinase reaction.
We have used the ADP-Glo™ Chemistry to develop highly sensitive assays for more than 170 kinases across the human kinome and further enhanced the assays for ease-of-use by developing the Kinase Selectivity Profiling Systems. These systems provide an easy-to-use, reliable platform for kinase inhibitor profiling in house.
And even better, we now provide an online Kinase Profiling System Designer so that you can design a custom Kinase Selectivity Profiling System to fit your exact experimental needs. Simply drag and drop the combination of kinases you need to create an 8-kinase strip and submit your order. Continue reading “Customized Kinase Selectivity Profiling Just Got Easier”
The phosphotidylinositol 4-kinases (PI 4-kinases) generate phosphotidyl-4-phosphate (PI(4)P) from phosphotylinositol. PI(4)P is an important precursor for other phosphoinositides involved in signaling, such as PI(4,5)P2, which is the substrate of phospholipase C (PLC) and the precursor of DAG and insitol (1,4,5) triphosphate.
There are four different mammalian PI 4-kinases currently described, and these have been divided into two classes based on their sensitivities to wortmannin and adenosine. Type II PI 4-kinases (PI4K2A and PI4K2B) are not sensitive to wortmannin, but are inhibited by the nonspecific inhibitor adenosine; Type III PI 4-kinases (PI4KA and PI4KB) are sensitive to wortmannin.
The functions of the PI 4-kinases and their products are not fully understood. At least one study has shown that PI 4-kinases are important for the proper recycling of synaptic vesicles. The PI 4-kinase from Drosophila, four-wheel drive, is critical for contractile ring formation during cytokinesis. Other studies in yeasts and mammals have shown that PI 4-kinases localize to the Golgi, and in mammals might be critical for proper budding of vesicles from the Golgi. Additionally, type III PI 4-kinases appear to play a role in the replication of hepatitis C virus (HCV) and enteroviruses by participating in the formation of altered host membrane structures. Although, we have hints about their function, to really understand and dissect the precise roles of PI 4-kinases in cells, new tools, such as specific small-molecule inhibitors are required. Continue reading “Identifying and Profiling Inhibitors for PI 4-Kinases Using a Luminescent High-Throughput Screen”