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In Vivo Assembly of Photosystem I-Hydrogenase Chimera for In Vitro PhotoH2 Production

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Resumo:Photosynthetic hydrogen (photoH2) production is an elegant approach to storing solar energy. The most efficient strategy is to couple the hydrogen-producing enzyme, the hydrogenase (H2ase), directly to photosystem I (PSI), which is a light-driven nanomachine found in photosynthetic organisms. PSI–H2ase fusions have been tested in vivo and in vitro. Both approaches have each their specific advantages and drawbacks. Here, a system to combine both approaches by assembling PSI–H2ase fusions in vivo for in vitro photoH2 production is established. For this, cyanobacterial PSI–H2ase fusion mutants are generated and characterized concerning photoH2 production in vivo. The chimeric protein is purified and embedded in a redox polymer on an electrode where it successfully produces photoH2 in vitro. The combination of in vivo and in vitro processes comes along with reciprocal benefits. The in vivo assembly ensures that the chimeric protein is fully functional and suited for the fabrication of bioelectrodes in vitro. At the same time, the photoelectrochemical in vitro characterization now permits to analyze the assemblies in detail. This will open avenues to optimize in vivo and in vitro approaches for photoH2 production in a target-oriented manner in the future.
Autores principais:Wang, Panpan
Outros Autores:Frank, Anna; Appel, Jens; Boehm, Marko; Strabel, Nadine; Nowaczyk, Marc M.; Schuhmann, Wolfgang; Conzuelo, Felipe; Gutekunst, Kirstin
Assunto:biophotovoltaics hydrogen evolution hydrogenases photosystem I protein chimera PSI–H ase fusion Renewable Energy, Sustainability and the Environment General Materials Science SDG 7 - Affordable and Clean Energy
Ano:2023
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade Nova de Lisboa
Idioma:inglês
Origem:Repositório Institucional da UNL

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