Journal of Microbiology

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Leuconostoc aquikimchii sp. nov., a Lactic Acid Bacterium Isolated from Cabbage Watery Kimchi: Subin Kim, Se Hee Lee, Ki Hyun Kim, Misun Yun; J. Microbiol. 2024;62(12):1089-1097. Published online December 2, 2024; DOI: https://doi.org/10.1007/s12275-024-00188-z

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Abstract: Two Gram-stain-positive, facultatively anaerobic, non-hemolytic, coccoid-shaped bacterial strains, designated MS01(T) and MS02, were isolated from cabbage watery kimchi in the Republic of Korea. Cellular growth occurred at 5-25 ℃ (optimum, 20 ℃), pH 5-8 (optimum, pH 7) and in the presence of 0-5% (w/v) NaCl (optimum, 1%). Results of 16S rRNA gene-based phylogenetic analyses showed that strains MS01(T) and MS02 shared identical sequences, clustered within the Leuconostoc clade in phylogenetic trees, and were most closely related to Leuconostoc inhae IH003(T) and Leuconostoc gasicomitatum LMG 18811(T) with sequence similarities of 98.74%. The complete whole-genome sequences of strains MS01(T) and MS02 measured 2.04-2.06 Mbp and harbored a 50.6 kb plasmid, with DNA G + C contents of 37.7% for both. Based on average nucleotide identities (ANI) and digital DNA-DNA hybridization (dDDH) values, both strains were confirmed to belong to the same species but showed ≤ 85.9% ANI and ≤ 29.9% dDDH values to other Leuconostoc species, indicating that they represent a novel species. Metabolic pathway reconstruction revealed that both strains perform heterolactic acid fermentation, producing lactate, acetate, and ethanol. Chemotaxonomic analyses, including cellular fatty acids, polar lipids, and peptidoglycan amino acid, confirmed the inclusion of both strains within the genus Leuconostoc. Based on the phylogenetic, genomic, and phenotypic characterization, strains MS01(T) and MS02 were considered to represent a novel species within the genus Leuconostoc, for which the name Leuconostoc aquikimchii sp. nov. is proposed with MS01(T) (= KACC 23748(T) = JCM 37028(T)) as the type strain.

Gracilibacillus kimchii sp. nov., a halophilic bacterium isolated from kimchi§: Young Joon Oh , Hae-Won Lee , Seul Ki Lim , Min-Sung Kwon , Jieun Lee , Ja-Young Jang , Hae Woong Park , Young-Do Nam , Myung-Ji Seo , Hak-Jong Choi; J. Microbiol. 2016;54(9):588-593. Published online August 31, 2016; DOI: https://doi.org/10.1007/s12275-016-6349-4

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A novel halophilic bacterium, strain K7T, was isolated from kimchi, a traditional Korean fermented food. The strain is Gram-positive, motile, and produces terminal endospores. The isolate is facultative aerobic and grows at salinities of 0.0–25.0% (w/v) NaCl (optimum 10–15% NaCl), pH 5.5–8.5 (optimum pH 7.0–7.5), and 15–42°C (optimum 37°C). The predominant isoprenoid quinone in the strain is menaquinone- 7 and the peptidoglycan of the strain is meso-diaminopimelic acid. The major fatty acids of the strain are anteisio- C15:0, iso-C15:0, and, C16:0 (other components were < 10.0%), while the major polar lipids are diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine, and three unidentified lipids. A phylogenetic analysis of 16S rRNA gene sequence similarity showed that the isolated strain was a cluster of the genus Gracilibacillus. High levels of gene sequence similarity were observed between strain K7T and Gracilibacillus orientalis XH-63T (96.5%), and between the present strain and Gracilibacillus xinjiangensis (96.5%). The DNA G+C content of this strain is 37.7 mol%. Based on these findings, strain K7T is proposed as a novel species: Gracilibacillus kimchii sp. nov. The type strain is K7T (KACC 18669T; JCM 31344T).

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Salicibibacter halophilus sp. nov., a moderately halophilic bacterium isolated from kimchi
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Journal of Microbiology.2018; 56(12): 880. CrossRef
Virgibacillus kimchii sp. nov., a halophilic bacterium isolated from kimchi
Young Joon Oh, Ja-Young Jang, Seul Ki Lim, Min-Sung Kwon, Jieun Lee, NamHee Kim, Mi-Young Shin, Hyo Kyeong Park, Myung-Ji Seo, Hak-Jong Choi
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Note] Oceanobacillus gochujangensis sp. nov., Isolated from gochujang a Traditional Korean Fermented Food: Seo-Jung Jang , Yu-Jin Kim , Sul-Hee Lee , Young-Seo Park , Jung-Min Park , Dong-Hoon Bai; J. Microbiol. 2014;52(12):1050-1055. Published online July 30, 2014; DOI: https://doi.org/10.1007/s12275-014-4220-z

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Abstract

A Gram-stain-positive, polar flagella-containing, rod-shaped, obligate aerobic, endospore-forming bacterium, strain TK1655T, was isolated from the traditional Korean food gochujang. The 16S rRNA sequence of strain TK1655T was a member of the genus Oceanobacillus similar to that of the type strain of Oceanobacillus oncorhynchi subsp. incaldanensis DSM 16557T (97.2%), O. oncorhynchi subsp. oncorhynchi JCM 12661T (97.1%), O. locisalsi KCTC 13253T (97.0%), and O. sojae JCM 15792T (96.9%). Strain TK1655T was oxidase and catalase positive. Colonies were circular, smooth, low convex, cream in colour, and measured about 0.5–1.0 mm in diameter. The range for growth was 20–40°C (optimal, 30°C), pH 6.0– 10.0 (optimal, 7.0), and 2–16% (w/v) NaCl (optimal, 2%). Additionally, the cells contained meso-DAP, and the predominant isoprenoid quinone was MK-7. The complex polar lipids were consisted of diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylcholine (PC). The major cellular fatty acid components were iso-C15:0, anteiso-C15:0, iso-C16:0, and anteiso-C17:0, and the DNA G+C content was 40.5%. DNA-DNA relatedness of our novel strain and reference strain O. locisalsi KCTC 13253T, O. oncorhynchi subsp. incaldanensis DSM 16557T, O. oncorhynchi subsp. oncorhynchi JCM 12661T was 45.7, 43.8, and 41.9%. From the
results
of phenotypic, chemotaxonomic, and phylogenetic analyses of strain TK1655T, we propose the novel species Oceanobacillus gochujangensis sp. nov. The type strain is TK1655T (=KCCM 101304T =KCTC 33014T =CIP 110582T =NBRC 109637T).

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NOTE] Antibiotic Resistance and Probiotic Properties of Dominant Lactic Microflora from Tungrymbai, an Ethnic Fermented Soybean Food of India: Sharmila Thokchom , Santa Ram Joshi; J. Microbiol. 2012;50(3):535-539. Published online June 30, 2012; DOI: https://doi.org/10.1007/s12275-012-1409-x

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Abstract

The present investigation was conducted to assess lactic acid bacteria present in traditionally fermented food of ethnic tribes in India for probiotic properties, antibacterial activity, and antibiotic tolerance behavior. Enterococcus sp., Lactobacillus sp., and Lactococcus sp. showed antibacterial activity against Bacillus cereus MTCC 430, Staphylococcus aureus subsp. aureus MTCC 740, and Salmonella enterica ser. paratyphi A MTCC 735. Lactococcus sp. and Lactobacillus sp. could tolerate acidic conditions (pH 2) and high bile salt concentration (4000 ppm). The lactic microflora were found to be sensitive to most common antibiotics, except for cloxacillin (5 μg), cephalexin (30 μg), and cephalothin (30 μg).

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