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Mangrovivirga cuniculi gen. nov., sp. nov., a moderately halophilic bacterium isolated from bioturbated Red Sea mangrove sediment, and proposal of the novel family Mangrovivirgaceae fam. nov.

ABSTRACT: A strictly aerobic, Gram-stain-negative, non-motile, rod-shaped bacterium, designated strain R1DC9T, was isolated from sediments of a mangrove stand on the Red Sea coast of Saudi Arabia via diffusion chamber cultivation. Strain R1DC9T grew at 20-40 °C (optimum, 37 °C), pH 6-10 (optimum, pH 8) and 3-11 % NaCl (optimum, 7-9 %) in the cultivation medium. The genome of R1DC9T was 4 661 901 bp long and featured a G+C content of 63.1 mol%. Phylogenetic analyses based on the 16S rRNA gene sequence and whole-genome multilocus sequence analysis using 120 concatenated single-copy genes revealed that R1DC9T represents a distinct lineage in the order Cytophagales and the phylum Bacteroidetes separated from the Roseivirgaceae and Marivirgaceae families. R1DC9T displayed 90 and 89 % 16S rRNA gene sequence identities with Marivirga sericea DSM 4125T and Roseivirga ehrenbergii KMM 6017T, respectively. The predominant quinone was MK7. The polar lipids were phosphatidylethanolamine, two unknown phospholipids and two unknown lipids. The predominant cellular fatty acids were the saturated branch chain fatty acids iso-C15 : 0, iso-C17 : 0 3-OH and iso-C17 : 0, along with a low percentage of the monounsaturated fatty acid C16 : 1  ω5c. Based on differences in phenotypic, physiological and biochemical characteristics from known relatives, and the results of phylogenetic analyses, R1DC9T (=KCTC 72349T=JCM 33609T=NCCB 100698T) is proposed to represent a novel species in a new genus, and the name Mangrovivirga cuniculi gen. nov., sp. nov. is proposed. The distinct phylogenetic lineage among the families in the order Cytophagales indicates that R1DC9T represents a new family for which the name Mangrovivirgaceae fam. nov. is proposed.

SUBMITTER: Sefrji FO 

PROVIDER: S-EPMC8489838 | biostudies-literature |

REPOSITORIES: biostudies-literature

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