Abstract

A novel Gram-negative, rod-shaped (0.2-0.5 um x 1.5-2.5 um), aerobic, non-motile bacterium was isolated from Gyeryongsan national park soil, Republic of Korea. The novel isolate was designated as THG-DN8.2T. The strain grows optimally at 28oC, at pH 7 and in the absence of NaCl. Phylogenetic analysis based on 16S rRNA gene sequence showed that the novel isolate shared the highest sequence similarity with Lysobacter oryzae KCTC 22249T followed by Lysobacter yangpyeongensis KACC 11407T and Lysobacter niabensis KACC 11587T. The DNA G+C content of strain THG-DN8.2T is 66.0 mol% and ubiquinone Q-8 is the main isoprenoid quinone. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, and phosphatidyl-N-methylethanolamine. The major fatty acids of strain THG-DN8.2T were identified as iso-C15:0, iso-C16:0, and C16:1w7c alcohol. The phylogenetic distinctiveness and phenotypic characteristics differentiated strain THG-DN8.2T from closely related Lysobacter species. The results of polyphasic taxonomic analysis suggest that strain THG-DN8.2T represents a novel species of the genus Lysobacter, for which the name Lysobacter tyrosinelyticus sp. nov. is proposed. The type strain is THG-DN8.2T (=KCTC 42235T =JCM 30320T).

• Keywords: Lysobacter tyrosinelyticus; Gram-negative; Ubiquinone Q-8; 16S rRNA