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Lactic acid bacteria

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Swine --- Swine --- Digestibility --- Digestibility --- lactic acid bacteria --- lactic acid bacteria

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Actinomycetes are a group of Gram-positive bacteria of which many representatives are prominent for being prolific producers of bioactive natural products including antibiotics, fungicides, antitumor agents, or immunosuppressants. SARP transcriptional regulators are widely distributed among actinomycetes, especially in streptomycetes and are known to activate antibiotic biosynthesis. The set of genes responsible for the production of natural products, including pathway specific transcriptional regulators such as SARPs, are typically located in contiguous regions of the genome known as "biosynthetic gene clusters" (BGCs). In this book, Oona Rössler reports on the activation of antibiotic BGCs in selected actinomycetes strains upon heterologous expression of the SARP-type regulator PapR2 from Streptomyces pristinaespiralis. Applying a bioinformatic screening for the abundance of SARP genes and SARP consensus sequences as part of BGCs, the author has selected actinomycetes candidate strains from the DSMZ strain collection for heterologous SARP expression. It is shown that overexpression of papR2 increased the production of predominantly unknown antimicrobial compounds in more than half of the selected actinomycetes strains, as observed by bioassays against different microbial test strains including bacteria and fungi. About the author Oona Rössler performed her Master Thesis at the Leibniz Institute DSMZ, German Collection of Microorganisms and Cell Cultures.

Biotechnology. --- Lactobacillus --- Lactic acid bacteria.

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

Lactic acid bacteria --- fermentation --- starter --- probiotic --- pathogen

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Survival --- lactic acid bacteria --- Lactobacillus acidophilus --- rabbits