Abstract
Cellular redox signaling is triggered by accumulation of various reactive oxygen species (ROS) that integrate with other signaling cascades to enable plants to ultimately respond to (a)biotic stresses. The identification of key regulators underlying redox signaling networks is therefore of high priority. This chapter describes an improved mRNA interactome capture method that allows to systematically detect oxidative stressresponsive regulators in the post-transcriptional gene regulation (PTGR) pathway. The protocol includes PSB-D suspension cell culture preparation, setup of oxidative stress conditions, short-term exposure to UV irradiation, cell lysis, pull-down and purification of crosslinked messenger ribonucleoproteins, their mass spectrometric analyses, and identification of proteome by statistical analyses. As result, a comprehensive inventory of the functional oxidative stressresponsive RBPome (OxRBPome) is generated, which paves the way toward new insights into PTGR processes in redox signaling.
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