期刊
NATURE PLANTS
卷 6, 期 10, 页码 1300-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41477-020-00779-9
关键词
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资金
- Wellcome Trust
- MRC
- BBRSC
- Electron Microscopy Core Facility (EMCF) at the European Molecular Biology Laboratory (EMBL)
- National Institutes of Health (NIH) [P41-GM103311]
- Israel Science Foundation [569/17]
- Joint UGC-ISF Research [2716/17]
- German-Israeli Foundation for Scientific Research and Development (GIF) [G-1483-207/2018]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [723991-CRYOMATH]
The ability of photosynthetic organisms to use sunlight as a sole source of energy is endowed by two large membrane complexes-photosystem I (PSI) and photosystem II (PSII). PSI and PSII are the fundamental components of oxygenic photosynthesis, providing oxygen, food and an energy source for most living organisms on Earth. Currently, high-resolution crystal structures of these complexes from various organisms are available. The crystal structures of megadalton complexes have revealed excitation transfer and electron-transport pathways within the various complexes. PSI is defined as plastocyanin-ferredoxin oxidoreductase but a high-resolution structure of the entire triple supercomplex is not available. Here, using a new cryo-electron microscopy technique, we solve the structure of native plant PSI in complex with its electron donor plastocyanin and the electron acceptor ferredoxin. We reveal all of the contact sites and the modes of interaction between the interacting electron carriers and PSI. The structure of a complex of native plant photosystem I, its electron donor plastocyanin and acceptor ferredoxin, has been solved using a new cryo-EM technique, revealing the contact sites and modes of interaction between the interacting electron carriers.
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