ArticleThe Journal of biological chemistry2012
Metabolic pathways for photobiological hydrogen production by nitrogenase- and hydrogenase-containing unicellular cyanobacteria Cyanothece.
Article in The Journal of biological chemistry, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
9 citing papers in PubMed, 47 citations in OpenAlex.
- Effects of Photosynthesis Inhibitors on HPlants (Basel, Switzerland) · 2026Review
- A directed genome evolution method to enhance hydrogen production inFrontiers in microbiology · 2022Article
- Simazine Enhances Dark Fermentative HFrontiers in bioengineering and biotechnology · 2022Article
- Hydrogen Dynamics inFrontiers in microbiology · 2019Article
- Cyanobacterial nitrogenases: phylogenetic diversity, regulation and functional predictions.Genetics and molecular biology · 2017Article
- Multi-Omic Dynamics Associate Oxygenic Photosynthesis with Nitrogenase-Mediated H2 Production in Cyanothece sp. ATCC 51142.Scientific reports · 2015Article
- Novel properties of photofermentative biohydrogen production by purple bacteria Rhodobacter sphaeroides: effects of protonophores and inhibitors of responsible enzymes.Microbial cell factories · 2015Article
- Cyanobacterial hydrogenases and hydrogen metabolism revisited: recent progress and future prospects.International journal of molecular sciences · 2015Review
- Sustained H(2) production driven by photosynthetic water splitting in a unicellular cyanobacterium.mBio · 2012Article
Corrections and comments
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Current biotechnological interest in nitrogen-fixing cyanobacteria stems from their robust respiration and capacity to produce hydrogen. Here we quantify both dark- and light-induced H(2) effluxes by Cyanothece sp. Miami BG 043511 and establish their respective origins. Dark, anoxic H(2) production occurs via hydrogenase utilizing reductant from glycolytic catabolism of carbohydrates (autofermentation). Photo-H(2) is shown to occur via nitrogenase and requires illumination of PSI, whereas production of O(2) by co-illumination of PSII is inhibitory to nitrogenase above a threshold pO(2). Carbohydrate also serves as the major source of reductant for the PSI pathway mediated via nonphotochemical reduction of the plastoquinone pool by NADH dehydrogenases type-1 and type-2 (NDH-1 and NDH-2). Redirection of this reductant flux exclusively through the proton-coupled NDH-1 by inhibition of NDH-2 with flavone increases the photo-H(2) production rate by 2-fold (at the expense of the dark-H(2) rate), due to production of additional ATP (via the proton gradient). Comparison of photobiological hydrogen rates, yields, and energy conversion efficiencies reveals opportunities for improvement.
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