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- W2972417376 abstract "Abstract The roseobacter clade is a group of α-proteobacteria that have diverse metabolic and regulatory capabilities. They are abundant in marine environments and have a substantial role in marine ecology and biogeochemistry. However, interactions between roseobacters and other bacterioplankton have not been extensively explored. In this study, we identify a killing mechanism in the model Roseobacter Ruegeria pomeroyi DSS-3 by competing it against a group of phylogenetically diverse bacteria. The killing mechanism involves an unidentified antimicrobial compound that is produced when cells are grown on both surfaces and in suspension and is dependent on cell density. A screen of random transposon mutants revealed the killing phenotype, as well as resistance to the antimicrobial, require genes within an ~8 kb putative γ-butyrolactone synthesis gene cluster, which resembles similar pheromone-sensing systems in actinomycetes that regulate secondary metabolite production. Transcriptomics revealed the gene cluster is highly upregulated in wild-type DSS-3 compared to a non-killer mutant when grown in liquid coculture with a roseobacter target. Our findings show that R. pomeroyi has the capability to eliminate closely- and distantly-related competitors, providing a mechanism to alter the community structure and function in its native habitats." @default.
- W2972417376 created "2019-09-19" @default.
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- W2972417376 date "2019-09-12" @default.
- W2972417376 modified "2023-09-26" @default.
- W2972417376 title "A model Roseobacter employs a diffusible killing mechanism to eliminate competitors" @default.
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- W2972417376 doi "https://doi.org/10.1101/766410" @default.
- W2972417376 hasPublicationYear "2019" @default.
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