2.4-Å structure of the double-ring Gemmatimonas phototrophica photosystem.
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Authors
Kloz, Miroslav
Kuzma, Marek
Zeng, Yonghui
Hájek, Jan
Publication Date
2022-02-18Journal Title
Sci Adv
ISSN
2375-2548
Publisher
American Association for the Advancement of Science (AAAS)
Volume
8
Issue
7
Language
eng
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Qian, P., Gardiner, A. T., Šímová, I., Naydenova, K., Croll, T. I., Jackson, P. J., Nupur, et al. (2022). 2.4-Å structure of the double-ring Gemmatimonas phototrophica photosystem.. Sci Adv, 8 (7) https://doi.org/10.1126/sciadv.abk3139
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.
Sponsorship
Wellcome Trust (209407/Z/17/Z)
Identifiers
35171663, PMC8849296
External DOI: https://doi.org/10.1126/sciadv.abk3139
This record's URL: https://www.repository.cam.ac.uk/handle/1810/335230
Rights
Attribution-NonCommercial 4.0 International
Licence URL: https://creativecommons.org/licenses/by-nc/4.0/
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