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  • Title: Complete Genome Sequence of the Biocontrol Agent Bacillus velezensis UFLA258 and Its Comparison with Related Species: Diversity within the Commons.
    Author: Silva FJ, Ferreira LC, Campos VP, Cruz-Magalhães V, Barros AF, Andrade JP, Roberts DP, de Souza JT.
    Journal: Genome Biol Evol; 2019 Oct 01; 11(10):2818-2823. PubMed ID: 31580420.
    Abstract:
    In this study, the full genome sequence of Bacillus velezensis strain UFLA258, a biological control agent of plant pathogens was obtained, assembled, and annotated. With a comparative genomics approach, in silico analyses of all complete genomes of B. velezensis and closely related species available in the database were performed. The genome of B. velezensis UFLA258 consisted of a single circular chromosome of 3.95 Mb in length, with a mean GC content of 46.69%. It contained 3,949 genes encoding proteins and 27 RNA genes. Analyses based on Average Nucleotide Identity and Digital DNA-DNA Hybridization and a phylogeny with complete sequences of the rpoB gene confirmed that 19 strains deposited in the database as Bacillus amyloliquefaciens were in fact B. velezensis. In total, 115 genomes were analyzed and taxonomically classified as follows: 105 were B. velezensis, 9 were B. amyloliquefaciens, and 1 was Bacillus siamensis. Although these species are phylogenetically close, the combined analyses of several genomic characteristics, such as the presence of biosynthetic genes encoding secondary metabolites, CRISPr/Cas arrays, Average Nucleotide Identity and Digital DNA-DNA Hybridization, and other information on the strains, including isolation source, allowed their unequivocal classification. This genomic analysis expands our knowledge about the closely related species, B. velezensis, B. amyloliquefaciens, and B. siamensis, with emphasis on their taxonomical status.
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