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Structural basis for energy and electron transfer of the photosystem I-IsiA-flavodoxin supercomplex

文献类型：期刊论文

作者Cao, Peng; Cao, Duanfang; Si, Long3; Su, Xiaodong; Tian, Lijin4; Chang, Wenrui3; Liu, Zhenfeng3; Zhang, Xinzheng2,3; Li, Mei
刊名NATURE PLANTS
出版日期2020
卷号6期号:2页码:167-176
ISSN号2055-026X
DOI10.1038/s41477-020-0593-7
文献子类Article
英文摘要Cyanobacterial photosystem I supercomplexes bind to iron-stress-induced proteins IsiA and flavodoxin under iron-deficiency conditions. They form a network that is highly efficient at light harvesting and retains normal electron transport efficiency. Under iron-deficiency stress, which occurs frequently in natural aquatic environments, cyanobacteria reduce the amount of iron-enriched proteins, including photosystem I (PSI) and ferredoxin (Fd), and upregulate the expression of iron-stress-induced proteins A and B (IsiA and flavodoxin (Fld)). Multiple IsiAs function as the peripheral antennae that encircle the PSI core, whereas Fld replaces Fd as the electron receptor of PSI. Here, we report the structures of the PSI3-IsiA(18)-Fld(3) and PSI3-IsiA(18) supercomplexes from Synechococcus sp. PCC 7942, revealing features that are different from the previously reported PSI structures, and a sophisticated pigment network that involves previously unobserved pigment molecules. Spectroscopic results demonstrated that IsiAs are efficient light harvesters for PSI. Three Flds bind symmetrically to the trimeric PSI core-we reveal the detailed interaction and the electron transport path between PSI and Fld. Our results provide a structural basis for understanding the mechanisms of light harvesting, energy transfer and electron transport of cyanobacterial PSI under stressed conditions.
学科主题Plant Sciences
出版地BERLIN
电子版国际标准刊号2055-0278
WOS关键词CHLOROPHYLL-BINDING-PROTEIN ; ABSORPTION CROSS-SECTION ; IRON-DEFICIENCY ; ANTENNA RING ; WILD-TYPE ; STRESS ; COMPLEX ; PSI ; SUBUNIT ; CP43'
WOS研究方向Plant Sciences
语种英语
WOS记录号WOS:000512529000005
出版者NATURE RESEARCH
资助机构National Key R&D Program of China [2017YFA0503702, 2017YFA0504700] ; Strategic Priority Research Program of CAS [XDB27020106, XDB08020302, XDB08030204] ; Key Research Program of Frontier Sciences of CAS [QYZDB-SSW-SMC005] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31930064, 31770778, 31570724, 31700649] ; National Thousand (Young) Talents Program from the Office of Global Experts Recruitment in China
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/21919]  
专题中科院光生物学重点实验室
作者单位1.Chinese Acad Sci, Ctr Biol Imaging, CAS Ctr Excellence Biomacromol, Inst Biophys, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Bot, Beijing, Peoples R China
3.Chinese Acad Sci, CAS Ctr Excellence Biomacromol, Inst Biophys, Natl Lab Biomacromol, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Cao, Peng,Cao, Duanfang,Si, Long,et al. Structural basis for energy and electron transfer of the photosystem I-IsiA-flavodoxin supercomplex[J]. NATURE PLANTS,2020,6(2):167-176.
APA Cao, Peng.,Cao, Duanfang.,Si, Long.,Su, Xiaodong.,Tian, Lijin.,...&Li, Mei.(2020).Structural basis for energy and electron transfer of the photosystem I-IsiA-flavodoxin supercomplex.NATURE PLANTS,6(2),167-176.
MLA Cao, Peng,et al."Structural basis for energy and electron transfer of the photosystem I-IsiA-flavodoxin supercomplex".NATURE PLANTS 6.2(2020):167-176.

入库方式： OAI收割

来源：植物研究所

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