Hydrogen production by using Rhodobacter capsulatus mutants with genetically modified electron transfer chains
By Y. Ozturk, M. Yücel, F. Daldal, S. Mandaci, U. Gündüz, L. Türker, I. Eroglu. 2006
109 citations recorded by the source corpus.
Abstract In Rhodobacter capsulatus excess reducing equivalents generated by organic acid oxidation is consumed to reduce protons into hydrogen by the activity of nitrogenase. Nitrogenase serves as a redox-balancing tool and is activated by the RegB/RegA global regulatory system during photosynthetic growth. The terminal cytochrome cbb 3 oxidase and the redox state of the cyclic photosynthetic electron transfer chain serve redox signaling to the RegB/RegA regulatory systems in Rhodobacter. In this study, hydrogen production of various R. capsulatus strains harboring the genetically modified electron carrier cytochromes or lacking the cyt cbb 3 oxidase or the quinol oxidase were compared with the wild type. The results indicated that hydrogen production of mutant strains with modified electron carrier cytochromes decreased 3- to 4-fold, but the rate of hydrogen production increased significantly in a cbb 3 - mutant. Moreover, hydrogen production efficiency of various R. capsulatus strains further increased by inactivation of uptake hydrogenase genes.
Subfields: Environmental Engineering, Molecular Biology, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/1a6f23638391c3b12646aa32750bdce8255ace8c
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Citations in the corpus
- Improved hydrogen production by uptake hydrogenase deficient mutant strain of Rhodobacter sphaeroides O.U.001 (2008, background): “reported that the inactivation of uptake hydrogenase resulted in total increase in hydrogen production [5–7].”