Abstract
Two bacterial strains designated NKC220-2T and NKC851-2
were isolated from commercial kimchi from different areas
in Korea. The strains were Gram-positive, aerobic, oxidaseand
catalase-positive, rod-shaped, spore-forming, non-motile,
and halophilic bacteria. Both strains grew without NaCl,
unlike type species in the genus Lentibacillus. The optimal
pH for growth was 8.0, higher than that of the type species
in the genus Lentibacillus, although growth was observed at
pH 5.5–9.0. 16S rRNA gene sequence-based phylogenetic analysis
indicated that the two strains (99.3–99.9% similarity)
are grouped within the genus Lentibacillus and most closely
related to Lentibacillus juripiscarius IS40-3T (97.4–97.6% similarity)
isolated from fish sauce in Thailand. OrthoANI value
between two novel strains and Lentibacillus lipolyticus SSKP1-
9T (79.5–79.6% similarity) was far lower than the species demarcation
threshold. Comparative genomic analysis displayed
differences between the two strains as well as among other
strains belonging to Lentibacillus. Furthermore, each isolate
had strain-specific groups of orthologous genes based on pangenome
analysis. Genomic G + C contents of strains NKC-
220-2T and NKC851-2 were 41.9 and 42.2 mol%, respectively.
The strains contained meso-diaminopimelic acid in their
cell walls, and the major menaquinone was menaquinone-7.
Phosphatidylglycerol, diphosphatidylglycerol, and an unidentified
glycolipid, aminophospholipid, and phospholipid were
the major polar lipid components of both strains. The major
cellular fatty acids of the strains were anteiso-C15:0 and anteiso-
C17:0. Based on phenotypic, genomic, phylogenetic, and
chemotaxonomic features, strains NKC220-2T and NKC851-2
represent novel species of the genus Lentibacillus, for which
the name Lentibacillus cibarius sp. nov. is proposed. The type
strain is NKC220-2T (= KACC 21232T = JCM 33390T).
Citations
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