期刊
SCIENCE
卷 348, 期 6238, 页码 989-995出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aab0214
关键词
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资金
- National Basic Research Program of China [2011CBA00901, 2015CB150101]
- Chinese Academy of Sciences [KGZD-EW-T05]
- JSPS KAKENHI from MEXT, Japan [24000018, 26840023]
- Grants-in-Aid for Scientific Research [15H01642, 26840023, 24000018] Funding Source: KAKEN
Photosynthesis converts solar energy to chemical energy by means of two large pigment-protein complexes: photosystem I (PSI) and photosystem II (PSII). In higher plants, the PSI core is surrounded by a large light-harvesting complex I (LHCI) that captures sunlight and transfers the excitation energy to the core with extremely high efficiency. We report the structure of PSI-LHCI, a 600-kilodalton membrane protein supercomplex, from Pisum sativum (pea) at a resolution of 2.8 angstroms. The structure reveals the detailed arrangement of pigments and other cofactors-especially within LHCI-as well as numerous specific interactions between the PSI core and LHCI. These results provide a firm structural basis for our understanding on the energy transfer and photoprotection mechanisms within the PSI-LHCI supercomplex.
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