Abstract
A Gram-negative, motile, rod-shaped, endospore-forming bacterial strain, designated as NCCP-36T, was isolated from the compost of fruit and vegetable wastes. The strain NCCP-36T grew within a temperature range of 10–45 ○C (optimum 28 ○C) and a pH range of 6.5–8.5 (optimum 7.0), and its cells tolerated <50 mM boron (optimum growth without boron) and 0–5 % NaCl (w/v) in tryptic soya broth medium. Based on comparative analysis of 16S rRNA gene sequence, strain NCCP-36T showed the highest similarity to Lysinibacillus sinduriensis BLB-1T (97.52 %) and L. xylanilyticus XDB9T (96.96 %), and <97 % similarity with other closely related taxa. However, DNA–DNA relatedness between strain NCCP-36T and the closely related type strains of genus Lysinibacillus was ≤37 %. Phylogenetic and chemotaxonomic analyses [major polar lipids: diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, and phospholipids; predominant menaquinone: MK-7; major cellular fatty acids: iso-C15:0, antieso-C15:0, and iso-C16:0; DNA G+C contents: 37 mol %; Lys-Asp (type A4α) in cell-wall peptidoglycans as diagnostic amino acids] also support the affiliation of strain NCCP-36T to genus Lysinibacillus. Based upon DNA–DNA relatedness as well as distinctive chemotaxonomic, phylogenetic, and genotypic data, we conclude that strain NCCP-36T belongs to a novel species of genus Lysinibacillus, for which the name Lysinibacillus composti sp. nov. is proposed. The type strain is NCCP-36T (JCM 18777T = KCTC 13796T = DSMZ 24785T).
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