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Poudyal, Roshan Sharma
식물 노화·수명 연구단
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Combinatory actions of CP29 phosphorylation by STN7 and stability regulate leaf age-dependent disassembly of photosynthetic complexes

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Title
Combinatory actions of CP29 phosphorylation by STN7 and stability regulate leaf age-dependent disassembly of photosynthetic complexes
Author(s)
Roshan Sharma Poudyal; MargaritaV. Rodionova; Hyunmin Kim; Seongsin Lee; Eunjeong Do; Suleyman I.Allakhverdiev; HongGil Nam; Daehee Hwang; Yumi Kim
Subject
PHOSPHOPROTEOME PROFILING REVEALS, ; PHOTOSYSTEM-II, ; PROTEIN-PHOSPHORYLATION, ; THYLAKOID MEMBRANES, ; STATE TRANSITIONS, ; CHLOROPHYLL-A, ; ARABIDOPSIS, ; KINASE, ; SENESCENCE, ; LHCII
Publication Date
2020-06
Journal
SCIENTIFIC REPORTS, v.10, no.1, pp.10267
Publisher
NATURE PUBLISHING GROUP
Abstract
© 2020, The Author(s). A predominant physiological change that occurs during leaf senescence is a decrease in photosynthetic efciency. An optimal organization of photosynthesis complexes in plant leaves is critical for efcient 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 signifcantly 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 efciency during leaf senescence. These data suggest a novel molecular mechanism to modulate leaf senescence via CP29 phosphorylation and fragmentation, serving as an efcient strategy to control photosynthesis complexes.
URI
https://pr.ibs.re.kr/handle/8788114/7825
DOI
10.1038/s41598-020-67213-0
ISSN
2045-2322
Appears in Collections:
Center for Plant Aging Research (식물 노화·수명 연구단) > 1. Journal Papers (저널논문)
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