Puzzle-Solving Mastery: How a Methane-Producing Bacterium Creates Its Own Sulfate Reduction Machinery — How a methanogenic microbe |
Scientists at the Max Planck Institute for Marine Microbiology have found that, a methanogen previously believed incapable of converting sulfate into sulfide due to the process’s high energy costs and harmful byproducts, can in fact grow on sulfate. The researchers discovered five genes encoding sulfate-reduction-associated enzymes in the methanogen’s genome, and by characterizing these enzymes, they assembled the first sulfate assimilation pathway from a methanogen.
grows exclusively on sulfate as sulfur source. Credit: Tristan Wagner / Max Planck Institute for Marine Microbiology “Things got really exciting when we measured the disappearance of sulfate as the organism grew. This was when we could really prove that the methanogen converts this substrate.” This allowed the researchers to safely cultivatein bioreactors in large scales, as they were no longer dependent on the toxic and explosive hydrogen sulfide gas for growth. “It provided us with enough biomass to study this fascinating organism,” explains Jespersen.
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