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  • Title: Empedobacter sedimenti sp. nov., isolated from sediment of East Taihu Lake.
    Author: Ruan L, Liu L, Jiang X, Mao D, Shao J, He J, Shen Q.
    Journal: Int J Syst Evol Microbiol; 2023 Nov; 73(11):. PubMed ID: 38015206.
    Abstract:
    A Gram-reaction-negative, strictly aerobic, pale yellow, non-gliding, rod-shaped bacterium, designated DT-LB-19T, was isolated from the sediment of East Taihu Lake in Jiangsu Province, PR China. Strain DT-LB-19T showed the highest 16S rRNA gene sequence similarities to members of the genera Algoriella, Chishuiella and Empedobacter (94.84-95.77 %) in the family Weeksellaceae. In phylogenetic trees based on genomes, strain DT-LB-19T clustered within the genus Empedobacter but formed a separate subclade with a high bootstrap value. The average nucleotide identity and digital DNA-DNA hybridization values between DT-LB-19T and the closely related type strains were in the range of 82.5-86.9 % and 25.8-32.3 %, respectively. The major cellular fatty acids were iso-C15 : 0, iso-C17 : 0 3-OH, C16 : 1  ω5c, C16 : 0, summed feature 4 (iso-C17 : 1 I and/or anteiso-C17 : 1 B), summed feature 3 (C16 : 1 ω7c and/or C16 : 1 ω6c) and iso-C15 : 03-OH. The predominant menaquinone was menaquinone-6. The polar lipid profile consisted of phosphatidylethanolamine, one glycolipid, two aminophospholipids and five unidentified lipids. The DNA G+C content was 31.8 mol%. Based on the phenotypic, chemotaxonomic, phylogenetic and genomic results, we propose that strain DT-LB-19T represents a novel species of the genus Empedobacter, for which the name Empedobacter sedimenti sp. nov. is proposed, with strain DT-LB-19T (=KCTC 82330T=CCTCC AB 2023026T= JSACC 11448T) as the type strain.
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