A Gram-stain-negative, facultatively aerobic, pink and oval bacterium, designed OS4
T, was isolated from a sediment sample taken from a coastal zone in China. The growth of OS4
T occurred at 20–37 °C (optimal 25 °C), pH 7.0–8.5 (optimal pH 8.0), in
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A Gram-stain-negative, facultatively aerobic, pink and oval bacterium, designed OS4
T, was isolated from a sediment sample taken from a coastal zone in China. The growth of OS4
T occurred at 20–37 °C (optimal 25 °C), pH 7.0–8.5 (optimal pH 8.0), in 0–5.0% (
w/
v) NaCl (optimal 2.0%). According to the phylogenetic analysis, strain OS4
T showed the highest sequence similarity (96.04%) with
Jannaschia aquimarina GSW-M26
T and shared 94.98% similarity with the type species of genus
Jannaschia-
strain J. helgolandensis 14858
T. Chemotaxonomic analysis showed that the sole respiratory quinone was ubiquinone 10, and the major fatty acids (>5.0%) included C
18:1 ω6c/ω7c, C
18:0, and C
10:0 3OH. The polar lipids consist of three phospholipids, two unknown amino-lipids, and four unknown glycerolipids. The DNA G + C content was 72.7 mol%. Based on the evidence presented in this study, strain OS4
T represents a novel species of the genus
Jannaschia, for which the name
Jannaschia sedimins sp. nov. is proposed. The type strain is OS4
T (=KCTC 82508
T = MCCC 1K03755
T). Both the phenotypic and the genetic analysis on the antimicrobial resistance genes indicate that OS4
T is resistant to a wide range of classes of antibiotics, which highlights that the ocean could potentially serve as the natural reservoir of antimicrobial resistance genes.
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