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Combinatory actions of CP29 phosphorylation by STN7 and stability regulate leaf age-dependent disassembly of photosynthetic complexes

Title
Combinatory actions of CP29 phosphorylation by STN7 and stability regulate leaf age-dependent disassembly of photosynthetic complexes
Authors
Poudyal, Roshan SharmaRodionova, Margarita, VKim, HyunminLee, SeongsinDo, EunjeongAllakhverdiev, Suleyman, INam, Hong GilHwang, DaeheeKim, Yumi
DGIST Authors
Poudyal, Roshan Sharma; Rodionova, Margarita, V; Kim, Hyunmin; Lee, Seongsin; Do, Eunjeong; Allakhverdiev, Suleyman, I; Nam, Hong Gil; Hwang, Daehee; Kim, Yumi
Issue Date
2020-06
Citation
Scientific Reports, 10(1)
Type
Article
Article Type
Article
Keywords
STATE TRANSITIONSCHLOROPHYLL-AARABIDOPSISKINASESENESCENCELHCIIPHOSPHOPROTEOME PROFILING REVEALSPHOTOSYSTEM-IIPROTEIN-PHOSPHORYLATIONTHYLAKOID MEMBRANES
ISSN
2045-2322
Abstract
A predominant physiological change that occurs during leaf senescence is a decrease in photosynthetic efficiency. An optimal organization of photosynthesis complexes in plant leaves is critical for efficient photosynthesis. However, molecular mechanisms for regulating photosynthesis complexes during leaf senescence remain largely unknown. Here we tracked photosynthesis complexes alterations during leaf senescence in Arabidopsis thaliana. Grana stack is significantly thickened and photosynthesis complexes were disassembled in senescing leaves. Defects in STN7 and CP29 led to an altered chloroplast ultrastructure and a malformation of photosynthesis complex organization in stroma lamella. Both CP29 phosphorylation by STN7 and CP29 fragmentation are highly associated with the photosynthesis complex disassembly. In turn, CP29 functions as a molecular glue to facilitate protein complex formation leading phosphorylation cascade and to maintain photosynthetic efficiency during leaf senescence. These data suggest a novel molecular mechanism to modulate leaf senescence via CP29 phosphorylation and fragmentation, serving as an efficient strategy to control photosynthesis complexes.
URI
http://hdl.handle.net/20.500.11750/12599
DOI
10.1038/s41598-020-67213-0
Publisher
Nature Publishing Group
Related Researcher
  • Author Nam, Hong Gil CBRG(Complex Biology Research Group)
  • Research Interests Plant Aging and Life History; Systems Biology; Complexbiology; Comparative Aging Research
Files:
Collection:
Department of New BiologyCBRG(Complex Biology Research Group)1. Journal Articles


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