Journal article

Proton motive force generation from stored polymers for the uptake of acetate under anaerobic conditions

Aaron M Saunders, Amanda N Mabbett, Alastair G McEwan, Linda L Blackall

FEMS MICROBIOLOGY LETTERS | OXFORD UNIV PRESS | Published : 2007

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 transpo..

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University of Melbourne Researchers