A novel halophilic bacterium, strain K7T, was isolated from
kimchi, a traditional Korean fermented food. The strain is
Gram-positive, motile, and produces terminal endospores.
The isolate is facultative aerobic and grows at salinities of
0.0–25.0% (w/v) NaCl (optimum 10–15% NaCl), pH 5.5–8.5
(optimum pH 7.0–7.5), and 15–42°C (optimum 37°C). The
predominant isoprenoid quinone in the strain is menaquinone-
7 and the peptidoglycan of the strain is meso-diaminopimelic
acid. The major fatty acids of the strain are anteisio-
C15:0, iso-C15:0, and, C16:0 (other components were < 10.0%),
while the major polar lipids are diphosphatidylglycerol, phosphatidylglycerol,
phosphatidylcholine, and three unidentified
lipids. A phylogenetic analysis of 16S rRNA gene sequence
similarity showed that the isolated strain was a cluster of the
genus Gracilibacillus. High levels of gene sequence similarity
were observed between strain K7T and Gracilibacillus orientalis
XH-63T (96.5%), and between the present strain and
Gracilibacillus xinjiangensis (96.5%). The DNA G+C content
of this strain is 37.7 mol%. Based on these findings, strain
K7T is proposed as a novel species: Gracilibacillus kimchii sp.
nov. The type strain is K7T (KACC 18669T; JCM 31344T).
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