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- W2943662828 abstract "Recent studies have reported abundant presence of bacterial extracellular membrane vesicles in the marine environment. However, the ecological significance of these bacterial vesicles in the marine environment is only beginning to be explored. In present study, for the first time we report and characterize membrane vesicles secreted by a seaweed associated bacterium, Alteromonas macleodii KS62. Proteomics studies revealed that the vesicle proteome was rich in hydrolytic enzymes (30%) like glycoside hydrolases, proteases, sulphatases, lipases, nucleases and phosphatases. Zymography experiments and enzyme assays established that the vesicles carry active κ-carrageenan degrading enzymes. κ-carrageenan is a major polysaccharide of cell walls of certain red seaweeds like Kappaphycus. Purified membrane vesicles were successfully able to degrade Kappaphycus biomass. Based on these results, we discuss how the hydrolase-rich vesicles may play a role in red seaweed cell wall degradation so that the bacteria can invade and colonise the seaweed biomass establishing a saprophytic lifestyle. We also discuss the role of these vesicles in nutrient acquisition and their ecological significance in the marine environment." @default.
- W2943662828 created "2019-05-09" @default.
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- W2943662828 date "2019-06-01" @default.
- W2943662828 modified "2023-10-01" @default.
- W2943662828 title "Characterization of membrane vesicles secreted by seaweed associated bacterium Alteromonas macleodii KS62" @default.
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- W2943662828 doi "https://doi.org/10.1016/j.bbrc.2019.04.148" @default.
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