Title |
Proton motive force generation from stored polymers for the uptake of acetate under anaerobic conditions
|
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Published in |
FEMS Microbiology Letters, July 2007
|
DOI | 10.1111/j.1574-6968.2007.00839.x |
Pubmed ID | |
Authors |
Aaron M. Saunders, Amanda N. Mabbett, Alastair G. McEwan, Linda L. Blackall |
Abstract |
The bacteria facilitating enhanced biological phosphorus removal gain a selective advantage from intracellularly stored polymer-driven substrate uptake under anaerobic conditions during sequential anaerobic : aerobic cycling. Mechanisms for these unusual membrane transport processes were proposed and experimentally validated using selective inhibitors and highly-enriched cultures of a polyphosphate-accumulating organism, Accumulibacter, and a glycogen-accumulating organism, Competibacter. Acetate uptake by both Accumulibacter and Competibacter was driven by a proton motive force (PMF). Stored polymers were used to generate the PMF -Accumulibacter used phosphate efflux through the Pit transporter, while Competibacter generated a PMF by proton efflux through the ATPase and fumarate reductase in the reductive TCA cycle. |
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Mendeley readers
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