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Lipidomic analysis of roseobacters of the pelagic RCA cluster and their response to phosphorus limitation
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Silvano, Eleonora, Yang, Mingyu , Wolterink, Mathias , Giebel, Helge-Ansgar, Simon, Meinhard , Scanlan, David J. , Zhao, Yanlin and Chen, Yin (2020) Lipidomic analysis of roseobacters of the pelagic RCA cluster and their response to phosphorus limitation. Frontiers in Microbiology, 11 . 552135. doi:10.3389/fmicb.2020.552135 ISSN 1664-302X.
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Official URL: https://doi.org/10.3389/fmicb.2020.552135
Abstract
The marine roseobacter-clade affiliated cluster (RCA) represents one of the most abundant groups of bacterioplankton in the global oceans, particularly in temperate and sub-polar regions. They play a key role in the biogeochemical cycling of various elements and are important players in oceanic climate-active trace gas metabolism. In contrast to copiotrophic roseobacter counterparts such as Ruegeria pomeroyi DSS-3 and Phaeobacter sp. MED193, RCA bacteria are truly pelagic and have smaller genomes. We have previously shown that RCA bacteria do not appear to encode the PlcP-mediated lipid remodeling pathway, whereby marine heterotrophic bacteria remodel their membrane lipid composition in response to phosphorus (P) stress by substituting membrane glycerophospholipids with alternative glycolipids or betaine lipids. In this study, we report lipidomic analysis of six RCA isolates. In addition to the commonly found glycerophospholipids such as phosphatidylglycerol (PG) and phosphatidylethanolamine (PE), RCA bacteria synthesize a relatively uncommon phospholipid, acylphosphatidylglycerol, which is not found in copiotrophic roseobacters. Instead, like the abundant SAR11 clade, RCA bacteria upregulate ornithine lipid biosynthesis in response to P stress, suggesting a key role of this aminolipid in the adaptation of marine heterotrophs to oceanic nutrient limitation.
| Item Type: | Journal Article | ||||||||||||
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| Subjects: | Q Science > QH Natural history > QH301 Biology | ||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||||||||||
| Library of Congress Subject Headings (LCSH): | Marine bacteria -- Research, Marine biology -- Research, Roseobacter, Heterotrophic bacteria, Lipids | ||||||||||||
| Journal or Publication Title: | Frontiers in Microbiology | ||||||||||||
| Publisher: | Frontiers Research Foundation | ||||||||||||
| ISSN: | 1664-302X | ||||||||||||
| Official Date: | 21 December 2020 | ||||||||||||
| Dates: |
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| Volume: | 11 | ||||||||||||
| Article Number: | 552135 | ||||||||||||
| DOI: | 10.3389/fmicb.2020.552135 | ||||||||||||
| Status: | Peer Reviewed | ||||||||||||
| Publication Status: | Published | ||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
| Date of first compliant deposit: | 26 November 2020 | ||||||||||||
| Date of first compliant Open Access: | 22 December 2020 | ||||||||||||
| RIOXX Funder/Project Grant: |
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