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The Protein Trio RPK1-CaM4-RbohF Mediates Transient Superoxide Production to Trigger Age-Dependent Cell Death in Arabidopsis

Title
The Protein Trio RPK1-CaM4-RbohF Mediates Transient Superoxide Production to Trigger Age-Dependent Cell Death in Arabidopsis
Authors
Koo, Ja ChoonLee, In ChulDai, ChengLee, Yu ReeCho, Hui KyungKim, Yu MiPhee, Bong KwanKim, Hyun MinLee, Il HwanChoi, Seung HeePark, Su JinJeon, In SeonNam, Hong GilKwak, June Myoung
DGIST Authors
Nam, Hong GilKwak, June Myoung
Issue Date
2017-12
Citation
Cell Reports, 21(12), 3373-3380
Type
Article
Article Type
Article
Keywords
NAC TRANSCRIPTION FACTORNADPH OXIDASE RBOHDLEAF SENESCENCEPLANT IMMUNITYOXIDATIVE STRESSABIOTIC STRESSABSCISIC-ACIDGENEKINASERPK1
ISSN
2211-1247
Abstract
Reactive oxygen species (ROS) are inevitable by-products of aerobic metabolic processes, causing non-specific oxidative damage and also acting as second messengers. Superoxide is a short-lived ROS that functions in various cellular responses, including aging and cell death. However, it is unclear as to how superoxide brings about age-dependent cell death and senescence. Here, we show that the accumulation and signaling of superoxide are mediated by three Arabidopsis proteins—RPK1, CaM4, and RbohF—which trigger subsequent cellular events leading to age-dependent cell death. We demonstrate that the NADPH oxidase RbohF is responsible for RPK1-mediated transient accumulation of superoxide, SIRK kinase induction, and cell death, all of which are positively regulated by CaM4. RPK1 physically interacts with and phosphorylates CaM4, which, in turn, interacts with RbohF. Overall, we demonstrate how the protein trio governs the superoxide accumulation and signaling at the cell surface to control senescence and cell death. Senescence and cell death in plants are the final developmental stages that ensure a plant's survival and succession to the next generation. Koo et al. show that age-dependent cell death is controlled by the interplay between RPK1, CaM4, and RbohF via the accumulation of the superoxide. © 2017 The Authors
URI
http://hdl.handle.net/20.500.11750/5626
DOI
10.1016/j.celrep.2017.11.077
Publisher
CELL PRESS
Related Researcher
  • Author Kwak, June Myoung KWAK_LAB(Lab of Cell Signailng)
  • Research Interests Calcium Signaling; ABA;ROS Signaling; drought-tolerant plants; Development of Abscission; Culluar Features; Signaling network; Environmental Regulation
Files:
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Collection:
Department of New BiologyCBRG(Complex Biology Research Group)1. Journal Articles
Department of New BiologyKWAK_LAB(Lab of Cell Signailng)1. Journal Articles


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