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Accumulation of ambient phosphate into the periplasm of marine bacteria is proton motive force dependent

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Kamennaya, Nina, Geraki, Kalotina, Scanlan, David J. and Zubkov, Mikhail V. (2020) Accumulation of ambient phosphate into the periplasm of marine bacteria is proton motive force dependent. Nature Communications, 11 (1). 2642. doi:10.1038/s41467-020-16428-w ISSN 2041-1723.

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Official URL: https://doi.org/10.1038/s41467-020-16428-w

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Abstract

Bacteria acquire phosphate (P ) by maintaining a periplasmic concentration below environmental levels. We recently described an extracellular P buffer which appears to counteract the gradient required for P diffusion. Here, we demonstrate that various treatments to outer membrane (OM) constituents do not affect the buffered P because bacteria accumulate P in the periplasm, from which it can be removed hypo-osmotically. The periplasmic P can be gradually imported into the cytoplasm by ATP-powered transport, however, the proton motive force (PMF) is not required to keep P in the periplasm. In contrast, the accumulation of P into the periplasm across the OM is PMF-dependent and can be enhanced by light energy. Because the conventional mechanism of P -specific transport cannot explain P accumulation in the periplasm we propose that periplasmic P anions pair with chemiosmotic cations of the PMF and millions of accumulated P pairs could influence the periplasmic osmolarity of marine bacteria.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Q Science > QH Natural history
Q Science > QR Microbiology
Divisions: Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- )
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Marine bacteria, Marine microbiology, Marine chemical ecology, Phosphates -- Absorption and adsorption
Journal or Publication Title: Nature Communications
Publisher: Nature Publishing Group
ISSN: 2041-1723
Official Date: 26 May 2020
Dates:
DateEvent
26 May 2020Published
24 April 2020Accepted
Volume: 11
Number: 1
Article Number: 2642
DOI: 10.1038/s41467-020-16428-w
Status: Peer Reviewed
Publication Status: Published
Reuse Statement (publisher, data, author rights): ** From PubMed via Jisc Publications Router ** History: received 12-02-2019; accepted 24-04-2020.
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 16 June 2020
Date of first compliant Open Access: 17 June 2020
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
NE/M014363/1Natural Environment Research Councilhttp://dx.doi.org/10.13039/501100000270
NE/J02273X/1Natural Environment Research Councilhttp://dx.doi.org/10.13039/501100000270

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