Modelling Photosynthesis with ZnII -Protoporphyrin All-DNA G-Quadruplex/Aptamer Scaffolds.

Guo-Feng Luo, Yonatan Biniuri, Wei-Hai Chen, Jianbang Wang, Ehud Neumann, Henri-Baptiste Marjault, Rachel Nechushtai, Martin Winkler, Thomas Happe, Itamar Willner

Angewandte Chemie (International ed. in English) 2020 Jun 02

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All-DNA scaffolds act as templates for the organization of photosystem I model systems. A series of DNA templates composed of ZnII -protoporphyrin IX (ZnII PPIX)-functionalized G-quadruplex conjugated to the 3'- or 5'-end of the tyrosinamide (TA) aptamer and ZnII PPIX/G-quadruplex linked to the 3'- and 5'-ends of the TA aptamer through a four-thymidine bridge. Effective photoinduced electron transfer (ET) from ZnII PPIX/G-quadruplex to bipyridinium-functionalized tyrosinamide, TA-MV2+ , bound to the TA aptamer units is demonstrated. The effectiveness of the primary ET quenching of ZnII PPIX/G-quadruplex by TA-MV2+ controls the efficiency of the generation of TA-MV+. . The photosystem-controlled formation of TA-MV+. by the different photosystems dictates the secondary activation of the ET cascade corresponding to the ferredoxin-NADP+ reductase (FNR)-catalysed reduction of NADP+ to NADPH by TA-MV+. , and the sequestered alcohol dehydrogenase catalysed reduction of acetophenone to 1-phenylethanol by NADPH. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Citation

Guo-Feng Luo, Yonatan Biniuri, Wei-Hai Chen, Jianbang Wang, Ehud Neumann, Henri-Baptiste Marjault, Rachel Nechushtai, Martin Winkler, Thomas Happe, Itamar Willner. Modelling Photosynthesis with ZnII -Protoporphyrin All-DNA G-Quadruplex/Aptamer Scaffolds. Angewandte Chemie (International ed. in English). 2020 Jun 02;59(23):9163-9170