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Transporter characterisation reveals aminoethylphosphonate mineralisation as a key step in the marine phosphorus redox cycle
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Murphy, Andrew, Scanlan, David J. , Chen, Yin, Adams, Nathan B. P., Cadman, William A., Bottrill, Andrew R., Bending, G. D., Hammond, John P., Hitchcock, Andrew, Wellington, Elizabeth M. H. and Lidbury, Ian D. E. A. (2021) Transporter characterisation reveals aminoethylphosphonate mineralisation as a key step in the marine phosphorus redox cycle. Nature Communications, 12 (1). 4554. doi:10.1038/s41467-021-24646-z
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WRAP-transporter-characterisation-reveals-aminoethylphosphonate-mineralisation-key-step-marine-phosphorus-redox-cycle-2021.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (3285Kb) | Preview |
Official URL: http://dx.doi.org/10.1038/s41467-021-24646-z
Abstract
The planktonic synthesis of reduced organophosphorus molecules, such as alkylphosphonates and aminophosphonates, represents one half of a vast global oceanic phosphorus redox cycle. Whilst alkylphosphonates tend to accumulate in recalcitrant dissolved organic matter, aminophosphonates do not. Here, we identify three bacterial 2-aminoethylphosphonate (2AEP) transporters, named AepXVW, AepP and AepSTU, whose synthesis is independent of phosphate concentrations (phosphate-insensitive). AepXVW is found in diverse marine heterotrophs and is ubiquitously distributed in mesopelagic and epipelagic waters. Unlike the archetypal phosphonate binding protein, PhnD, AepX has high affinity and high specificity for 2AEP (Stappia stellulata AepX Kd 23 ± 4 nM; methylphosphonate Kd 3.4 ± 0.3 mM). In the global ocean, aepX is heavily transcribed (~100-fold>phnD) independently of phosphate and nitrogen concentrations. Collectively, our data identifies a mechanism responsible for a major oxidation process in the marine phosphorus redox cycle and suggests 2AEP may be an important source of regenerated phosphate and ammonium, which are required for oceanic primary production.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QD Chemistry Q Science > QH Natural history Q Science > QR Microbiology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Organophosphorus compounds , Organophosphorus compounds -- Synthesis, Phosphonates -- Absorption and adsorption, Marine bacteria, Phosphorus cycle (Biogeochemistry) | ||||||||||||
| Journal or Publication Title: | Nature Communications | ||||||||||||
| Publisher: | Nature Publishing Group | ||||||||||||
| ISSN: | 2041-1723 | ||||||||||||
| Official Date: | 27 July 2021 | ||||||||||||
| Dates: |
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| Volume: | 12 | ||||||||||||
| Number: | 1 | ||||||||||||
| Article Number: | 4554 | ||||||||||||
| DOI: | 10.1038/s41467-021-24646-z | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||
| RIOXX Funder/Project Grant: |
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