Journal of Microbiology

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Genome sequence analysis of potential probiotic strain Leuconostoc lactis EFEL005 isolated from kimchi: Jin Seok Moon , Hye Sun Choi , So Yeon Shin , Sol Ji Noh , Che Ok Jeon , Nam Soo Han; J. Microbiol. 2015;53(5):337-342. Published online May 3, 2015; DOI: https://doi.org/10.1007/s12275-015-5090-8

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Leuconostoc lactis EFEL005 (KACC 91922) isolated from kimchi showed promising probiotic attributes; resistance against acid and bile salts, absence of transferable genes for antibiotic resistance, broad utilization of prebiotics, and no hemolytic activity. To expand our understanding of the species, we generated a draft genome sequence of the strain and analyzed its genomic features related to the aforementioned probiotic properties. Genome assembly resulted in 35 contigs, and the draft genome has 1,688,202 base pairs (bp) with a G+C content of 43.43%, containing 1,644 protein-coding genes and 50 RNA genes. The average nucleotide identity analysis showed high homology (≥ 96%) to the type strain L. lactis KCTC3528, but low homology (≤ 95%) to L. lactis KCTC3773 (formerly L. argentinum). Genomic analysis revealed the presence of various genes for sucrose metabolism (glucansucrases, invertases, sucrose phosphorylases, and mannitol dehydrogenase), acid tolerance (F1F0 ATPases, cation transport ATPase, branched-chain amino acid permease, and lysine decarboxylase), vancomycin response regulator, and antibacterial peptide (Lactacin F). No gene for production of biogenic amines (histamine and tyramine) was found. This report will facilitate the understanding of probiotic properties of this strain as a starter for fermented foods.

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Note] Analysis of a draft genome sequence of Kitasatospora cheerisanensis KCTC 2395 producing bafilomycin antibiotics: Jae Yoon Hwang , Soo Hee Kim , Hye Ryeung Oh , Eunju Kwon , Doo Hyun Nam; J. Microbiol. 2015;53(1):84-89. Published online December 4, 2014; DOI: https://doi.org/10.1007/s12275-015-4340-0

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Abstract

Kitasatospora cheerisanensis KCTC 2395, producing bafilomycin antibiotics belonging to plecomacrolide group, was isolated from a soil sample at Mt. Jiri, Korea. The draft genome sequence contains 8.04 Mb with 73.6% G+C content and 7,810 open reading frames. All the genes for aerial mycelium and spore formations were confirmed in this draft genome. In phylogenetic analysis of MurE proteins (UDPN- acetylmuramyl-L-alanyl-D-glutamate:DAP ligase) in a conserved dcw (division of cell wall) locus, MurE proteins of Kitasatospora species were placed in a separate clade between MurEs of Streptomyces species incorporating LL-diaminopimelic acid (DAP) and MurEs of Saccharopolyspora erythraea as well as Mycobacterium tuberculosis ligating meso- DAP. From this finding, it was assumed that Kitasatospora MurEs exhibit the substrate specificity for both LL-DAP and meso-DAP. The bafilomycin biosynthetic gene cluster was located in the left subtelomeric region. In 71.3 kb-long gene cluster, 17 genes probably involved in the biosynthesis of bafilomycin derivatives were deduced, including 5 polyketide synthase (PKS) genes comprised of 12 PKS modules.

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