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- W4383373630 abstract "Abstract Exploring Brevibacterium strains from various ecosystems may lead to the discovery of new antibiotic-producing strains. Brevibacterium sp. H-BE7, a strain isolated from marine sediments from Northern Patagonia, Chile, exhibited antimicrobial activity against Salmonella enterica and Listeria monocytogenes . Chemical dereplication identified bioactive compounds, such as 1-methoxyphenazine in the crude extracts of strain H-BE7, which could be responsible of the observed antibacterial activity. The genome of Brevibacterium sp. H-BE7 was sequenced and a phenazine-like biosynthetic gene clusters (BGCs) is not present within the genome. To study the biosynthetic potential of strain H-BE7 and Brevibacterium genus, the genome sequences of 98 Brevibacterium strains, including strain H-BE7, were selected for a genomic analysis. A phylogenomic cladogram was generated, which divided the Brevibacterium strains into four major clades. A total of 25 strains are potentially unique new species according to Average Nucleotide Identity (ANIb) values. These strains were isolated from various environments, emphasizing the importance of exploring diverse ecosystems to discover the full diversity of Brevibacterium . Pangenome analysis of Brevibacterium strains revealed that only 2.5% of gene clusters are included within the core genome, and most gene clusters occur either as singletons or as cloud genes present in less than ten strains. Brevibacterium strains from various phylogenomic clades exhibit diverse BGCs. Specific groups of BGCs show clade-specific distribution patterns, such as siderophore BGCs and carotenoid-related BGCs. A group of clade IV-A Brevibacterium strains possess a clade-specific Polyketide synthase (PKS) BGCs that connects with phenazine-related BGCs and could be related to the production of 1-methoxyphenazine in HBE-7’s crude extract. Within the PKS BGC, five genes, including the biosynthetic PKS gene, participate in the mevalonate pathway and exhibit similarities with the phenazine A BGC. However, additional core biosynthetic phenazine genes were exclusively discovered in nine Brevibacterium strains, primarily isolated from cheese. While strain H-BE7 lacks the core phenazine biosynthetic genes, it produces 1-methoxyphenazine, indicating the presence of an unknown biosynthetic pathway for this compound. This suggests the existence of alternative biosynthetic pathways or promiscuous enzymes within H-BE7's genome." @default.
- W4383373630 created "2023-07-07" @default.
- W4383373630 creator A5014676257 @default.
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- W4383373630 date "2023-07-06" @default.
- W4383373630 modified "2023-09-23" @default.
- W4383373630 title "Exploring the Biosynthetic Gene Clusters in Brevibacterium: A Comparative Genomic Analysis of Diversity and Distribution" @default.
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