Details

Autor(en) / Beteiligte

• Qian, Pu
• Gardiner, Alastair T
• Šímová, Ivana
• Naydenova, Katerina
• Croll, Tristan I
• Jackson, Philip J
• Nupur
• Kloz, Miroslav
• Čubáková, Petra
• Kuzma, Marek
• Zeng, Yonghui
• Castro-Hartmann, Pablo
• van Knippenberg, Bart
• Goldie, Kenneth N
• Kaftan, David
• Hrouzek, Pavel
• Hájek, Jan
• Agirre, Jon
• Siebert, C Alistair
• Bína, David
• Sader, Kasim
• Stahlberg, Henning
• Sobotka, Roman
• Russo, Christopher J
• Polívka, Tomáš
• Hunter, C Neil
• Koblížek, Michal

Titel

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

Ist Teil von

• Science advances, 2022-02, Vol.8 (7), p.eabk3139-eabk3139

Ort / Verlag

United States: American Association for the Advancement of Science

Erscheinungsjahr

2022

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• 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 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 has independently evolved its own compact, robust, and highly effective architecture for harvesting and trapping solar energy.