The Journal of General and Applied Microbiology
Online ISSN : 1349-8037
Print ISSN : 0022-1260
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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
Takeshi SatoKazuhito InoueHidehiro SakuraiKenji V. P. Nagashima
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2017 Volume 63 Issue 5 Pages 274-279


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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© 2017, Applied Microbiology, Molecular and Cellular Biosciences Research Foundation
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