Jina Lee, Seung-Hui Song, Kira Moon, Nakyeong Lee, Sangdon Ryu, Hye Seon Song, Sung Moon Lee, Yun Ji Kim, Se Won Chun, Kyung-Min Choi, Aslan Hwanhwi Lee
{"title":"Thalassotalea aquiviva sp. nov., and Thalassotalea maritima sp. nov., Isolated from Seawater of the Coast in South Korea.","authors":"Jina Lee, Seung-Hui Song, Kira Moon, Nakyeong Lee, Sangdon Ryu, Hye Seon Song, Sung Moon Lee, Yun Ji Kim, Se Won Chun, Kyung-Min Choi, Aslan Hwanhwi Lee","doi":"10.1007/s12275-024-00191-4","DOIUrl":null,"url":null,"abstract":"<p><p>Two novel bacterial strains, 273M-4<sup>T</sup> and Sam97<sup>T</sup>, were isolated from seawater in the Yellow Sea, Muan-gun, South Korea, and identified as members of the genus Thalassotalea. Both strains were Gram-stain-negative, aerobic, rod-shaped, non-motile, non-flagellated, and oxidase- and catalase-positive. Phylogenetic analysis based on 16S rRNA gene sequences showed that strains 273M-4<sup>T</sup> and Sam97<sup>T</sup> were most closely related to Thalassotalea ponticola KCTC 42155<sup>T</sup>, with sequence similarities of 97.5% and 98.3%, respectively. Optimal growth for strain 273M-4<sup>T</sup> occurred at 25-30 °C, pH 7.0, and 2% NaCl, while strain Sam97<sup>T</sup> grew optimally at 30 °C, pH 8.0, and 2% NaCl. Genome sizes of strains 273M-4<sup>T</sup> and Sam97<sup>T</sup> were 3.37 and 3.31 Mb, with DNA G + C contents of 41.0 mol% and 42.9 mol%, respectively. The orthologous average nucleotide identity (OrthoANI) and digital DNA-DNA hybridization (dDDH) values between the two strains were 71.6% and 24.4%, respectively, indicating that they are distinct species. Further genomic analyses of these two strains revealed OrthoANI values of < 73.5% and dDDH values of < 26.7% within the genus Thalassotalea, suggesting their distinctiveness from other Thalassotalea species. The predominate fatty acids of strains 273M-4<sup>T</sup> and Sam97<sup>T</sup> were summed feature 3 (consisting of C<sub>16:1</sub> ω7c/C<sub>16:1</sub> ω6c) and C<sub>16:0</sub>. All strains contained phosphatidylethanolamine and phosphatidylglycerol as the major polar lipids and ubiquinone-8 (Q-8) as the primary respiratory quinone. Based on phenotypic, phylogenetic, genotypic, and chemotaxonomic data, strains 273M-4<sup>T</sup> (= KCTC 8644<sup>T</sup> = LMG 33695<sup>T</sup>) and Sam97<sup>T</sup> (= KCTC 8645<sup>T</sup> = LMG 33694<sup>T</sup>) represent novel species of the genus Thalassotalea, named Thalassotalea aquiviva sp. nov. and Thalassotalea maritima sp. nov..</p>","PeriodicalId":16546,"journal":{"name":"Journal of Microbiology","volume":" ","pages":"1099-1111"},"PeriodicalIF":3.3000,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Microbiology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1007/s12275-024-00191-4","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/10 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Two novel bacterial strains, 273M-4T and Sam97T, were isolated from seawater in the Yellow Sea, Muan-gun, South Korea, and identified as members of the genus Thalassotalea. Both strains were Gram-stain-negative, aerobic, rod-shaped, non-motile, non-flagellated, and oxidase- and catalase-positive. Phylogenetic analysis based on 16S rRNA gene sequences showed that strains 273M-4T and Sam97T were most closely related to Thalassotalea ponticola KCTC 42155T, with sequence similarities of 97.5% and 98.3%, respectively. Optimal growth for strain 273M-4T occurred at 25-30 °C, pH 7.0, and 2% NaCl, while strain Sam97T grew optimally at 30 °C, pH 8.0, and 2% NaCl. Genome sizes of strains 273M-4T and Sam97T were 3.37 and 3.31 Mb, with DNA G + C contents of 41.0 mol% and 42.9 mol%, respectively. The orthologous average nucleotide identity (OrthoANI) and digital DNA-DNA hybridization (dDDH) values between the two strains were 71.6% and 24.4%, respectively, indicating that they are distinct species. Further genomic analyses of these two strains revealed OrthoANI values of < 73.5% and dDDH values of < 26.7% within the genus Thalassotalea, suggesting their distinctiveness from other Thalassotalea species. The predominate fatty acids of strains 273M-4T and Sam97T were summed feature 3 (consisting of C16:1 ω7c/C16:1 ω6c) and C16:0. All strains contained phosphatidylethanolamine and phosphatidylglycerol as the major polar lipids and ubiquinone-8 (Q-8) as the primary respiratory quinone. Based on phenotypic, phylogenetic, genotypic, and chemotaxonomic data, strains 273M-4T (= KCTC 8644T = LMG 33695T) and Sam97T (= KCTC 8645T = LMG 33694T) represent novel species of the genus Thalassotalea, named Thalassotalea aquiviva sp. nov. and Thalassotalea maritima sp. nov..
期刊介绍:
Publishes papers that deal with research on microorganisms, including archaea, bacteria, yeasts, fungi, microalgae, protozoa, and simple eukaryotic microorganisms. Topics considered for publication include Microbial Systematics, Evolutionary Microbiology, Microbial Ecology, Environmental Microbiology, Microbial Genetics, Genomics, Molecular Biology, Microbial Physiology, Biochemistry, Microbial Pathogenesis, Host-Microbe Interaction, Systems Microbiology, Synthetic Microbiology, Bioinformatics and Virology. Manuscripts dealing with simple identification of microorganism(s), cloning of a known gene and its expression in a microbial host, and clinical statistics will not be considered for publication by JM.