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• W3005443213 endingPage "1080" @default.
• W3005443213 startingPage "1063" @default.
• W3005443213 abstract "Reactive oxygen species (ROS) are important messengers in eukaryotic organisms, and their production is tightly controlled. Active extracellular ROS production by NADPH oxidases in plants is triggered by receptor-like protein kinase-dependent signaling networks. Here, we show that CYSTEINE-RICH RLK2 (CRK2) kinase activity is required for plant growth and CRK2 exists in a preformed complex with the NADPH oxidase RESPIRATORY BURST OXIDASE HOMOLOG D (RBOHD) in Arabidopsis (Arabidopsis thaliana). Functional CRK2 is required for the full elicitor-induced ROS burst, and consequently the crk2 mutant is impaired in defense against the bacterial pathogen Pseudomonas syringae pv tomato DC3000. Our work demonstrates that CRK2 regulates plant innate immunity. We identified in vitro CRK2-dependent phosphorylation sites in the C-terminal region of RBOHD. Phosphorylation of S703 RBOHD is enhanced upon flg22 treatment, and substitution of S703 with Ala reduced ROS production in Arabidopsis. Phylogenetic analysis suggests that phospho-sites in the C-terminal region of RBOHD are conserved throughout the plant lineage and between animals and plants. We propose that regulation of NADPH oxidase activity by phosphorylation of the C-terminal region might be an ancient mechanism and that CRK2 is an important element in regulating microbe-associated molecular pattern-triggered ROS production." @default.
• W3005443213 created "2020-02-14" @default.
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• W3005443213 date "2020-02-07" @default.
• W3005443213 modified "2023-10-16" @default.
• W3005443213 title "CRK2 and C-terminal Phosphorylation of NADPH Oxidase RBOHD Regulate Reactive Oxygen Species Production in Arabidopsis" @default.
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• W3005443213 doi "https://doi.org/10.1105/tpc.19.00525" @default.
• W3005443213 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7145479" @default.
• W3005443213 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32034035" @default.

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