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  • Title: Effects of the deletion of hup genes encoding the uptake hydrogenase on the activity of hydrogen production in the purple photosynthetic bacterium Rubrivivax gelatinosus IL144.
    Author: Sato T, Inoue K, Sakurai H, Nagashima KVP.
    Journal: J Gen Appl Microbiol; 2017 Nov 17; 63(5):274-279. PubMed ID: 28904251.
    Abstract:
    The efficiency of hydrogen gas production by nitrogenase in bacteria has been improved by the inhibition of antagonistic activity by the uptake hydrogenase. In this study, a mutant lacking the gene coding for the uptake hydrogenase was generated from the photosynthetic beta-proteobacterium Rubrivivax gelatinosus IL144 to explore new ways of hydrogen gas production driven by light energy. The mutant cells produced 25-30% higher amounts of molecular hydrogen than the wild-type cells under nitrogen-deficient conditions under light. Furthermore, by the addition of 5 mM glutamate, the photosynthetic growth rate was greatly enhanced, and the hydrogen gas production activity reached 41.1 (mmol/l) in the mutant.
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