Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 13, Issue 9, Pages 2903-2914Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ee03859k
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Funding
- National Science Foundation [CBET-1706960]
- Israel Science Foundation [2185/17, 1646/16]
- NSF-BSF Energy for Sustainability grant [2016666]
- Division Of Computer and Network Systems
- Direct For Computer & Info Scie & Enginr [2016666] Funding Source: National Science Foundation
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Harnessing the power of photosynthesis to catalyze novel light-driven redox chemistry requires a way to intercept electron flow directly from the photosynthetic electron transport chain (PETC). As a proof of concept, an in vivo fusion of photosystem I (PSI) and algal hydrogenase was created by insertion of the HydA sequence into the PsaC subunit. The PSI and hydrogenase portions are co-assembled and active in vivo, effectively creating a new photosystem. Cells expressing only the PSI-hydrogenase chimera make hydrogen at high rates in a light-dependent fashion for several days. In these engineered cells, photosynthetic electron flow is directed away from CO2 fixation and towards proton reduction, demonstrating the possibility of driving novel redox chemistries using electrons from water splitting and the photosynthetic electron transport chain.
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