Qian, Pu, Gardiner, Alastair T, Šímová, Ivana et al. (24 more authors) (2022) 2.4-Å structure of the double-ring Gemmatimonas phototrophica photosystem. Science Advances. eabk3139. ISSN 2375-2548
Abstract
Phototrophic Gemmatimonadetes evolved the ability to use solar energy following horizontal transfer of photosynthesis-related genes from an ancient phototrophic proteobacterium. The electron cryo-microscopy structure of the Gemmatimonas phototrophica photosystem at 2.4 Å reveals a unique, double-ring complex. Two unique membrane-extrinsic polypeptides, RC-S and RC-U, hold the central type 2 reaction center (RC) within an inner 16-subunit light-harvesting 1 (LH1) ring, which is encircled by an outer 24-subunit antenna ring (LHh) that adds light-gathering capacity. Femtosecond kinetics reveal the flow of energy within the RC-dLH complex, from the outer LHh ring to LH1 and then to the RC. This structural and functional study shows that G. phototrophica has independently evolved its own compact, robust, and highly effective architecture for harvesting and trapping solar energy.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 18 Feb 2022 09:50 |
Last Modified: | 17 Dec 2024 00:22 |
Published Version: | https://doi.org/10.1126/sciadv.abk3139 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1126/sciadv.abk3139 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:183790 |
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Filename: sciadv.abk3139.pdf
Description: 2.4-Å structure of the double-ring Gemmatimonas phototrophica photosystem
Licence: CC-BY-NC 2.5