Abstract
An isolate, designated strain KIGAM418T was isolated from marine mud below 192 m depth in the Hupo Basin, Republic of Korea. Strain KIGAM418T was Gram-stain positive, spore-forming, rod-shaped, facultatively anaerobic, and grew at 10‒45 °C, in 0‒2% (w/v) NaCl at pH 4.0‒12.0. The strain tested positive for catalase, oxidase, and motility. Phylogenetic analysis of the 16S rRNA gene sequence indicated that strain KIGAM418T was related to the genus Fictibacillus. The strain showed the highest similarity to Fictibacillus rigui WPCB074T (98.0–98.1%) and Fictibacillus solisalsi YC1T (97.2–97.8%). The diagnostic diamino acid of the cell wall was meso-diaminopimelic acid. The major fatty acids were characterized as anteiso-C15:0 and iso-C15:0. Strain KIGAM418T possessed diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylethanolamine as the major polar lipids and menaquinone-7 as the predominant menaquinone. The genome size and G + C content were 4.56 Mb and 43.2 mol%, respectively. According to predicted functional genes of the genome, the category of amino acid transport and metabolism was mainly distributed. Based on the polyphasic taxonomic data, strain KIGAM418T represents a novel species of the genus Fictibacillus, for which the name Fictibacillus marinisediminis sp. nov. is proposed. The type strain is KIGAM418T (= KCTC 43291 T = JCM 34437 T).
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This work was supported by Research Assistance Program (2021) in the Incheon National University. This work also was supported by grants from the National Institute of Biological Resources funded by the Ministry of Environment (No. NIBR202203112), Republic of Korea.
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ESC and CYH performed all the experiments and drafted the manuscript. DHJ and ITC contributed to analyze the microbial genome. MJS designed all the experiments and supervised the manuscript.
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Cho, ES., Hwang, C.Y., Jung, DH. et al. Fictibacillus marinisediminis sp. nov., a nitrate-reducing bacterium isolated from marine sediment in Hupo Basin, Republic of Korea. Arch Microbiol 204, 474 (2022). https://doi.org/10.1007/s00203-022-03067-6
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DOI: https://doi.org/10.1007/s00203-022-03067-6