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NADP+ supply adjusts the synthesis of photosystem I in Arabidopsis chloroplasts

文献类型：期刊论文

作者Ji, Daili; Li, Qiuxin3; Guo, Yinjie3; An, Wenjing3; Manavski, Nikolay4; Meurer, Jorg4; Chi, Wei1,3
刊名PLANT PHYSIOLOGY
出版日期2022
卷号189期号:4页码:2128-2143
ISSN号0032-0889
DOI10.1093/plphys/kiac161
文献子类Article
英文摘要In oxygenic photosynthesis, NADP(+) acts as the final acceptor of the photosynthetic electron transport chain and receives electrons via the thylakoid membrane complex photosystem I (PSI) to synthesize NAPDH by the enzyme ferredoxin:NADP(+) oxidoreductase. The NADP(+)/NADPH redox couple is essential for cellular metabolism and redox homeostasis. However, how the homeostasis of these two dinucleotides is integrated into chloroplast biogenesis remains largely unknown. Here, we demonstrate the important role of NADP(+) supply for the biogenesis of PSI by examining the nad kinase 2 (nadk2) mutant in Arabidopsis (Arabidopsis thaliana), which demonstrates disrupted synthesis of NADP(+) from NAD(+) in chloroplasts. Although the nadk2 mutant is highly sensitive to light, the reaction center of photosystem II (PSII) is only mildly and likely only secondarily affected compared to the wild-type. Our studies revealed that the primary limitation of photosynthetic electron transport, even at low light intensities, occurs at PSI rather than at PSII in the nadk2 mutant. Remarkably, this primarily impairs the de novo synthesis of the two PSI core subunits PsaA and PsaB, leading to the deficiency of the PSI complex in the nadk2 mutant. This study reveals an unexpected molecular link between NADK activity and mRNA translation of psaA/B in chloroplasts that may mediate a feedback mechanism to adjust de novo biosynthesis of the PSI complex in response to a variable NADPH demand. This adjustment may be important to protect PSI from photoinhibition under conditions that favor acceptor side limitation. Mutation of NAD KINASE2 leads to NADP+ deficiency and impairs the synthesis of photosystem I in chloroplasts of Arabidopsis.
学科主题Plant Sciences
出版地CARY
电子版国际标准刊号1532-2548
WOS关键词THYLAKOID MEMBRANE ; CHLOROPHYLL-FLUORESCENCE ; NAD KINASE ; PYRIDINE-NUCLEOTIDES ; PROTEIN ; FERREDOXIN ; BIOGENESIS ; PLANTS ; DOMAIN ; IDENTIFICATION
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000786134700001
出版者OXFORD UNIV PRESS INC
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences [XDA26030202] ; National Key Research and Development Program [2020YFA0907601] ; National Science Foundation of China [31000339] ; German Science Foundation (DFG) [SFB TRR175]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/28545]  
专题中科院光生物学重点实验室
作者单位1.Ludwig Maximilians Univ Munchen, Fac Biol, Plant Mol Biol, D-82152 Munich, Germany
2.Chinese Acad Sci, Innovat Acad Seed Design, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Photosynth Res Ctr, Inst Bot, Key Lab Photobiol, Beijing 100093, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Ji, Daili,Li, Qiuxin,Guo, Yinjie,et al. NADP+ supply adjusts the synthesis of photosystem I in Arabidopsis chloroplasts[J]. PLANT PHYSIOLOGY,2022,189(4):2128-2143.
APA Ji, Daili.,Li, Qiuxin.,Guo, Yinjie.,An, Wenjing.,Manavski, Nikolay.,...&Chi, Wei.(2022).NADP+ supply adjusts the synthesis of photosystem I in Arabidopsis chloroplasts.PLANT PHYSIOLOGY,189(4),2128-2143.
MLA Ji, Daili,et al."NADP+ supply adjusts the synthesis of photosystem I in Arabidopsis chloroplasts".PLANT PHYSIOLOGY 189.4(2022):2128-2143.

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来源：植物研究所

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