Identification of protein kinase targets and specific inhibition of individual kinase isoforms on the protein level in planta are important techniques to elucidate signal transduction pathways. The use of ATP-binding pocket mutants, the so-called gatekeeper mutants, that accommodate N6-enlarged nucleotides and kinase inhibitors has allowed a dramatic increase in kinase isoform selectivity. In this chapter, we describe protocols for the identification and mutation of the gatekeeper residue, radiolabeling of N6-modified nucleotides, analysis of protein targets by using [32P]-labeled N6-modified nucleotides, and in vivo inhibition of kinase activity combined with subsequent molecular readouts. The chapter includes alternative approaches for the described techniques, considerations for other kinases and recommendations toward a setup of a substrate labeling experiment using total cell lysate.
CITATION STYLE
Böhmer, M., Bölker, M., & Romeis, T. (2011). Chemical genetic analysis of protein kinase function in plants. In Methods in Molecular Biology (Vol. 779, pp. 259–271). Humana Press Inc. https://doi.org/10.1007/978-1-61779-264-9_15
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