Identifying challenges and opportunities for histone peptides in protein engineering platforms
Meanor, J. N.; Keung, A. J.; Rao, B. M.
Show abstract
Histone post-translational modifications are small chemical changes to histone protein structure that have cascading effects on diverse cellular functions. Detecting histone modifications and characterizing their binding partners are critical steps in understanding chromatin biochemistry and have been accessed using common reagents such as antibodies, recombinant assays, and FRET based systems. High throughput platforms could accelerate work in this field, and also could be used to engineer de novo histone affinity reagents; yet published studies on their use with histones have been noticeably sparse. Here we describe specific experimental conditions that affect binding specificities of post-translationally modified histones in classic protein engineering platforms and likely explain the relative difficulty with histone targets in these platforms. We also show that manipulating avidity of binding interactions may improve specificity of binding.
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