Taxis Toward Hydrogen Gas by Methanococcus maripaludis
Autor: | James M. Connolly, Carey Downey, Matthew W. Fields, Robin Gerlach, Kristen A. Brileya |
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Jazyk: | angličtina |
Rok vydání: | 2013 |
Předmět: |
Methanococcus
Hydrogen chemistry.chemical_element Motility Time-Lapse Imaging Article Microbiology 03 medical and health sciences 030304 developmental biology 0303 health sciences Multidisciplinary biology 030306 microbiology Chemotaxis Methanococcus maripaludis biology.organism_classification Methanogen Microscopy Electron chemistry Biophysics Signal transduction Locomotion Archaea |
Zdroj: | Scientific Reports |
ISSN: | 2045-2322 |
Popis: | Knowledge of taxis (directed swimming) in the Archaea is currently expanding through identification of novel receptors, effectors, and proteins involved in signal transduction to the flagellar motor. Although the ability for biological cells to sense and swim toward hydrogen gas has been hypothesized for many years, this capacity has yet to be observed and demonstrated. Here we show that the average swimming velocity increases in the direction of a source of hydrogen gas for the methanogen, Methanococcus maripaludis using a capillary assay with anoxic gas-phase control and time-lapse microscopy. The results indicate that a methanogen couples motility to hydrogen concentration sensing and is the first direct observation of hydrogenotaxis in any domain of life. Hydrogenotaxis represents a strategy that would impart a competitive advantage to motile microorganisms that compete for hydrogen gas and would impact the C, S and N cycles. |
Databáze: | OpenAIRE |
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