Hydrogen oxidizing bacteria

Hydrogen oxidizing bacteria, or sometimes Knallgas-bacteria, are bacteria that oxidize hydrogen as a source of energy with oxygen as final electron acceptor. See microbial metabolism (hydrogen oxidation). These bacteria include Hydrogenobacter thermophilus, Cupriavidus necator, Hydrogenovibrio marinus, and Helicobacter pylori.[1] There are both Gram positive and Gram negative knallgas bacteria.

Most grow best under microaerobic conditions. They do this because the hydrogenase enzyme used in hydrogen oxidation is inhibited by the presence of oxygen, but oxygen is still needed as a terminal electron acceptor.[2]

The word Knallgas means "oxyhydrogen" (a mixture of hydrogen and oxygen, literally "bang-gas") in Germanic languages.

References

Olson JW and Maier RJ (2002) Molecular hydrogen as an energy source for Helicobacter pylori. Science 298:1788-90. full text
Jugder, Bat-Erdene; Welch, Jeffrey; Aguey-Zinsou, Kondo-Francois; Marquis, Christopher P. (2013). "Fundamentals and electrochemical applications of [Ni–Fe]-uptake hydrogenases". RSC Advances. 3 (22): 8142. doi:10.1039/c3ra22668a. ISSN 2046-2069.

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[1] Olson JW and Maier RJ (2002) Molecular hydrogen as an energy source for Helicobacter pylori. Science 298:1788-90. full text

[2] Jugder, Bat-Erdene; Welch, Jeffrey; Aguey-Zinsou, Kondo-Francois; Marquis, Christopher P. (2013). "Fundamentals and electrochemical applications of [Ni–Fe]-uptake hydrogenases". RSC Advances. 3 (22): 8142. doi:10.1039/c3ra22668a. ISSN 2046-2069.