2.4-angstrom structure of the double-ring Gemmatimonas phototrophica photosystem

0557870 - MBÚ 2023 RIV US eng J - Journal Article
Qian, P. - Gardiner, Alastair T. - Šímová, I. - Naydenova, K. - Croll, T. - Jackson, P. - Nupur, Nupur - Kloz, Miroslav - Čubáková, Petra - Kuzma, Marek - Zeng, Y. - Castro-Hartmann, P. - van Knippenberg, B. - Goldie, K. - Kaftan, David - Hrouzek, Pavel - Hájek, Jan - Agirre, J. - Siebert, C. - Bína, D. - Sader, K. - Stahlberg, H. - Sobotka, Roman - Russo, C. - Polívka, T. - Hunter, C. - Koblížek, Michal
2.4-angstrom structure of the double-ring Gemmatimonas phototrophica photosystem.
Science Advances. Roč. 8, č. 7 (2022), č. článku eabk3139. ISSN 2375-2548. E-ISSN 2375-2548
R&D Projects: GA ČR(CZ) GX19-28778X
Institutional support: RVO:61388971 ; RVO:68378271
Keywords : multiple sequence alignment * light-harvesting complex * rc-lh1 core complex * cryo-em structure * crystal-structure * rhodospirillum-rubrum * antenna complex * purple bacteria * environment * mechanism
OECD category: Microbiology; Biophysics (FZU-D)
Impact factor: 13.6, year: 2022
Method of publishing: Open access
https://www.science.org/doi/10.1126/sciadv.abk3139

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 angstrom 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.
Permanent Link: http://hdl.handle.net/11104/0331715