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

doi:10.1038/s41477-020-0593-7

IB-CAS > 中科院光生物学重点实验室

	Structural basis for energy and electron transfer of the photosystem I-IsiA-flavodoxin supercomplex
	Cao, Peng ; Cao, Duanfang ; Si, Long 1; Su, Xiaodong ; Tian, Lijin2 ; Chang, Wenrui 1; Liu, Zhenfeng 1; Zhang, Xinzheng 1,3; Li, Mei
	2020
发表期刊	NATURE PLANTS
ISSN	2055-026X
卷号	6 期号:2 页码:167-176
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.
学科领域	Plant Sciences
DOI	10.1038/s41477-020-0593-7
收录类别	SCI
语种	英语
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
WOS记录号	WOS:000512529000005
出版者	NATURE RESEARCH
文献子类	Article
出版地	BERLIN
EISSN	2055-0278
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
作者邮箱	xzzhang@ibp.ac.cn ; meili@ibp.ac.cn
引用统计	被引频次：38[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	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, CAS Ctr Excellence Biomacromol, Inst Biophys, Natl Lab Biomacromol, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Bot, Beijing, Peoples R China 4.Chinese Acad Sci, Ctr Biol Imaging, CAS Ctr Excellence Biomacromol, Inst Biophys, 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.

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