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• W2885609095 abstract "Marine microorganisms employ multiple strategies to cope with transient and persistent nutrient limitation, one of which, for alleviating phosphorus (P) stress, is to substitute membrane glycerophospholipids with non-P containing surrogate lipids. Such a membrane lipid remodelling strategy enables the most abundant marine phytoplankton and heterotrophic bacteria to adapt successfully to nutrient scarcity in marine surface waters. An important group of non-P lipids, the aminolipids which lack a diacylglycerol backbone, are poorly studied in marine microbes. Here, using a combination of genetic, lipidomics and metagenomics approaches, we reveal for the first time the genes (glsB, olsA) required for the formation of the glutamine-containing aminolipid. Construction of a knockout mutant in either glsB or olsA in the model marine bacterium Ruegeria pomeroyi DSS-3 completely abolished glutamine lipid production. Moreover, both mutants showed a considerable growth cost under P-deplete conditions and the olsA mutant, that is unable to produce the glutamine and ornithine aminolipids, ceased to grow under P-deplete conditions. Analysis of sequenced microbial genomes show that glsB is primarily confined to the Rhodobacteraceae family, which includes the ecologically important marine Roseobacter clade that are key players in the marine sulphur and nitrogen cycles. Analysis of the genes involved in glutamine lipid biosynthesis in the Tara ocean metagenome dataset revealed the global occurrence of glsB in marine surface waters and a positive correlation between glsB abundance and N* (a measure of the deviation from the canonical Redfield ratio), suggesting glutamine lipid plays an important role in the adaptation of marine Rhodobacteraceae to P limitation." @default.
• W2885609095 created "2018-08-22" @default.
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• W2885609095 date "2018-08-14" @default.
• W2885609095 modified "2023-09-25" @default.
• W2885609095 title "Elucidation of glutamine lipid biosynthesis in marine bacteria reveals its importance under phosphorus deplete growth in Rhodobacteraceae" @default.
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• W2885609095 doi "https://doi.org/10.1038/s41396-018-0249-z" @default.
• W2885609095 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6298996" @default.
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• W2885609095 hasPublicationYear "2018" @default.
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