Proteomic Identification of Early Salicylate- and Flg22-responsive Redox-sensitive Proteins in Arabidopsis

Overview

Journal Sci Rep

Specialty Science

Date 2015 Feb 28

PMID 25720653

Citations 22

Authors

Pei Liu

Huoming Zhang

Boying Yu

Liming Xiong

Yiji Xia

Affiliations

Soon will be listed here.

Abstract

Accumulation of reactive oxygen species (ROS) is one of the early defense responses against pathogen infection in plants. The mechanism about the initial and direct regulation of the defense signaling pathway by ROS remains elusive. Perturbation of cellular redox homeostasis by ROS is believed to alter functions of redox-sensitive proteins through their oxidative modifications. Here we report an OxiTRAQ-based proteomic study in identifying proteins whose cysteines underwent oxidative modifications in Arabidopsis cells during the early response to salicylate or flg22, two defense pathway elicitors that are known to disturb cellular redox homeostasis. Among the salicylate- and/or flg22-responsive redox-sensitive proteins are those involved in transcriptional regulation, chromatin remodeling, RNA processing, post-translational modifications, and nucleocytoplasmic shuttling. The identification of the salicylate-/flg22-responsive redox-sensitive proteins provides a foundation from which further study can be conducted toward understanding biological significance of their oxidative modifications during the plant defense response.

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