Proteins from microbes are a large source of potential raw material for novel pharmaceuticals. Endophytic bacteria associated with algae associated have been shown to be particularly promising candidates. In a previous study, a crude protein extract was isolated from an endophytic Vibrio sp. strain ES25. The extract was found to have anti-microbial activity. Despite these promising results, further work was needed to characterize both the protein and the bacteria that produce it. In this study, we sought to increase the activity of the previously discovered protein through pepsin digestion as well as provide sequence data to characterize the bacterial isolate. Here we show promising evidence that the hydrolysate produced (QA1d) was found to have a promising antimicrobial as well as anticancer properties. Through DNA sequencing we also provide better taxonomic information on the isolate. Finally using LC-MS/MS and in silico prediction, we identify to novel peptides produced from the bacterial protein that were predicted to have multifunctional activity. These results shown here indicate these peptides are promising candidates for anticancer drug development or antibacterial agents for the food industry.
Key words: antibacterial, anticancer, endophytic bacteria, peptide, protein, protein hydrolysate, Vibrio
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