Intramolecular charge-transfer enhances energy transfer efficiency in carotenoid-reconstituted light-harvesting 1 complex of purple photosynthetic bacteria

0563827 - MBÚ 2023 RIV GB eng J - Článek v odborném periodiku
Yukihira, N. - Uragami, C. - Horiuchi, K. - Kosumi, D. - Gardiner, Alastair T. - Cogdell, R. J. - Hashimoto, H.
Intramolecular charge-transfer enhances energy transfer efficiency in carotenoid-reconstituted light-harvesting 1 complex of purple photosynthetic bacteria.
Communications Chemistry. Roč. 5, č. 1 (2022), č. článku 135. ISSN 2399-3669. E-ISSN 2399-3669
Grant CEP: GA ČR(CZ) GX19-28778X
Institucionální podpora: RVO:61388971
Klíčová slova: rhodospirillum-rubrum s1excited-state dynamicschlorophyll-a-proteinantenna complexlh1 complexabsorption-spectroscopytransient absorptionultrafast dynamicstriplet conversionsolvent polarity * rhodospirillum-rubrum s1 * excited-state dynamics * chlorophyll-a-protein * antenna complex * lh1 complex * absorption-spectroscopy * transient absorption * ultrafast dynamics * triplet conversion * solvent polarity
Obor OECD: Microbiology
Impakt faktor: 5.9, rok: 2022
Způsob publikování: Open access
https://www.nature.com/articles/s42004-022-00749-6

In bacterial photosynthesis, the excitation energy transfer (EET) from carotenoids to bacteriochlorophyll a has a significant impact on the overall efficiency of the primary photosynthetic process. This efficiency can be enhanced when the involved carotenoid has intramolecular charge-transfer (ICT) character, as found in light-harvesting systems of marine alga and diatoms. Here, we provide insights into the significance of ICT excited states following the incorporation of a higher plant carotenoid, beta-apo-8'-carotenal, into the carotenoidless light-harvesting 1 (LH1) complex of the purple photosynthetic bacterium Rhodospirillum rubrum strain G9+. beta-apo-8'-carotenal generates the ICT excited state in the reconstituted LH1 complex, achieving an efficiency of EET of up to 79%, which exceeds that found in the wild-type LH1 complex.
Trvalý link: https://hdl.handle.net/11104/0335622