Funding Organization(s): Czech Science Foundation, Biotechnology and Biological Sciences Research Council (BBSRC), European Research Council (ERC), European Regional Development Fund, Wellcome Trust, Medical Research Council (MRC, United Kingdom), Royal Society
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.
AO [auth bm] BN [auth bf] CO [auth bn] FK [auth H1] HM [auth bb]
AO [auth bm], BN [auth bf], CO [auth bn], FK [auth H1], HM [auth bb], IN [auth bi], IO [auth bo], JM [auth bb], KN [auth bi], MO [auth bp], NM [auth bc], ON [auth bj], RE [auth AQ], RK [auth L], SD [auth AJ], SM [auth bd], SN [auth bk], TL [auth aj], VN [auth bl], WM [auth be]
(19R,22S)-25-amino-22-hydroxy-22-oxido-16-oxo-17,21,23-trioxa-22lambda~5~-phosphapentacosan-19-yl (9Z)-hexadec-9-enoate C37 H72 N O8 P CZOSTDZGCCEZTJ-WMHOIYFHSA-N
A [auth AA] B [auth AB] C [auth AC] D [auth AD] E [auth AE]
A [auth AA], B [auth AB], C [auth AC], D [auth AD], E [auth AE], F [auth AF], G [auth AG], H [auth AH], I [auth AI], J [auth AJ], K [auth AK], L [auth AL], M [auth AM], N [auth AN], O [auth AO], P [auth AP], Q [auth AQ], R [auth AR], S [auth AS], T [auth AT], U [auth AU], V [auth AV], W [auth AW], X [auth AX]
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