Massively Parallel SPR-Based Fragment Screening of Kinase Arrays

Introduction

As a drug target class, kinases continue to provide a wealth of opportunities for addressing human disease, but often can be challenging to work with in vitro. Additionally, the ubiquitous nature of kinases across many critical pathways means therapeutic targeting of this class necessitates careful consideration regarding off-target profiles. Direct label-free approaches, such as SPR, can complement activity assays by providing the intrinsic affinity and real-time kinetics of interactions. Here we highlight the power of combining an extensive panel of ready-made biotinylated kinases with HT-SPR to generate a wealth of compound binding information. In three days over 125,000 interactions were measured between a panel of kinases and the Maybridge 1000 fragment library. We also profiled a kinase-focused small molecule library and obtained more than 80,000 binding interactions in a three-day instrument run. Detailed kinetics were then subsequently obtained for hits of interest. Beyond simple yes/no reporting, this approach allows for nuanced kinetic profiling for up to hundreds of binding events in parallel, thereby enabling thoughtful discovery of safe and efficacious drug candidates.

Posted by Anthony Giannetti