How do methanotrophs handle the toxic effects of hydrogensulfide? UofIllinois
Methanotrophs are bacteria capable on growing on methane as their sole carbon source. They may provide a promising route for upgrading natural gas into more valuable fuels and chemicals. However, natural gas may contain significant quantities of hydrogen sulfide. Little is known about how hydrogen sulfide affects the growth and physiology of methanotrophs aside from a few studies showing that it is inhibitory.
Our analysis of the differentially expressed genes and changes in metabolite concentrations suggests that hydrogen sulfide inhibits cellular respiration. The cells respond to sulfide stress in part by increasing the rate of sulfide oxidation and by increasing the expression of sulfide quinone reductase and a putative persulfide dioxygenase.
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