7O0U

Cryo-EM structure (model_1a) of the RC-dLH complex from Gemmatimonas phototrophica at 2.4 A

This is a non-PDB format compatible entry.

Summary for 7O0U

• Entry DOI: 10.2210/pdb7o0u/pdb
• EMDB information: 12679
• Descriptor: LHh-alpha, alpha-L-rhamnopyranose-(1-4)-alpha-D-mannopyranose, BACTERIOCHLOROPHYLL A, ... (26 entities in total)
• Functional Keywords: photosynthesis, reaction centre light harvesting complex, rc-dlh, rc-lh1, carotenoid, quinone, bacteriochlorophyll a, gemmatimonas phototrophica, membrane protein
• Biological source: Gemmatimonas phototrophica; More
• Total number of polymer chains: 86
• Total formula weight: 850424.42

Authors

Qian, P.,Koblizek, M. (deposition date: 2021-03-27, release date: 2022-03-02, Last modification date: 2024-10-23)

Primary citation

Qian, P.,Gardiner, A.T.,Simova, I.,Naydenova, K.,Croll, T.I.,Jackson, P.J.,Kloz, M.,Cubakova, P.,Kuzma, M.,Zeng, Y.,Castro-Hartmann, P.,van Knippenberg, B.,Goldie, K.N.,Kaftan, D.,Hrouzek, P.,Hajek, J.,Agirre, J.,Siebert, C.A.,Bina, D.,Sader, K.,Stahlberg, H.,Sobotka, R.,Russo, C.J.,Polivka, T.,Hunter, C.N.,Koblizek, M.
2.4- angstrom structure of the double-ring Gemmatimonas phototrophica photosystem.
Sci Adv, 8:eabk3139-eabk3139, 2022

PubMed 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 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.

PubMed: 35171663
DOI: 10.1126/sciadv.abk3139

Experimental method

ELECTRON MICROSCOPY (2.35 Å)