ArticlePhotosynthesis research2015
The Photosystem II D1-K238E mutation enhances electrical current production using cyanobacterial thylakoid membranes in a bio-photoelectrochemical cell.
Article in Photosynthesis research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 24 citations in OpenAlex.
- Identification of genetic loci and candidate genes regulating photosynthesis and leaf morphology through genome-wide association study inFrontiers in plant science · 2024Article
- Life in biophotovoltaics systems.Frontiers in plant science · 2023Review
- The Interaction of Water-Soluble Nitroxide Radicals with Photosystem II.Applied magnetic resonance · 2022Article
- NADPH performs mediated electron transfer in cyanobacterial-driven bio-photoelectrochemical cells.iScience · 2021Article
- Photovoltage generation by photosystem II core complexes immobilized onto a Millipore filter on an indium tin oxide electrode.Journal of bioenergetics and biomembranes · 2020Article
- Investigation of photocurrents resulting from a living unicellular algae suspension with quinones over time.Chemical science · 2018Article
- Live cyanobacteria produce photocurrent and hydrogen using both the respiratory and photosynthetic systems.Nature communications · 2018Article
- Photosynthetic fuel for heterologous enzymes: the role of electron carrier proteins.Photosynthesis research · 2017Review
- Redesigning the QNature communications · 2017Article
- Hybrid bio-photo-electro-chemical cells for solar water splitting.Nature communications · 2016Article
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Authors and funding
9 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The conversion of solar energy (SEC) to storable chemical energy by photosynthesis has been performed by photosynthetic organisms, including oxygenic cyanobacteria for over 3 billion years. We have previously shown that crude thylakoid membranes from the cyanobacterium Synechocytis sp. PCC 6803 can reduce the electron transfer (ET) protein cytochrome c even in the presence of the PSII inhibitor DCMU. Mutation of lysine 238 of the Photosystem II D1 protein to glutamic acid increased the cytochrome reduction rates, indicating the possible position of this unknown ET pathway. In this contribution, we show that D1-K238E is rather unique, as other mutations to K238, or to other residues in the same vicinity, are not as successful in cytochrome c reduction. This observation indicates the sensitivity of ET reactions to minor changes. As the next step in obtaining useful SEC from biological material, we describe the use of crude Synechocystis membranes in a bio-photovoltaic cell containing an N-acetyl cysteine-modified gold electrode. We show the production of significant current for prolonged time durations, in the presence of DCMU. Surprisingly, the presence of cytochrome c was not found to be necessary for ET to the bio-voltaic cell.
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