Abstract
We present a generic method for screening small molecule kinases for their acceptor specificity. The release of the reaction byproduct adenosine diphosphate (ADP) triggers a concentration-dependent formation of amylose from sucrose, by using the combined enzymatic action of sucrose synthase and glycogen synthase. Kinase activities could be quantified photometrically after the formation of a dark-blue amylose-polyiodide complex. We demonstrate that this method can be used to profile both known and novel nucleotide- and sugar-kinases for their substrate specificity. Using a facile and widely available methodology, the amylose-polyiodide small-molecule kinase assay presented herein has the potential to perform substrate screenings of small molecule kinases in a high-throughput manner.
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