Lysobacter caseinilyticus, sp. nov., a casein hydrolyzing bacterium isolated from sea water.

A novel bacterial strain, designated KVB24T, was isolated from sea-water of Busan Harbour in South Korea. Cells of strain KVB24T were Gram-stain negative, aerobic, rod shaped and non-motile. Strain KVB24T grew optimally at 25-28 °C and pH 6.5-7.0. Based on 16S rRNA gene sequence analysis, strain KVB24T was shown to belong to the genus Lysobacter within the class Gammaproteobacteria and to be closely related to Lysobacter dokdonensis DS-58T, Lysobacter hankyongensis KTce-2T and Lysobacter niastensis GH41-7T. DNA-DNA relatedness between strain KVB24T and its current closest relative was below 70%. The predominant fatty acids of strain KVB24T were iso-C11:0, iso-C11:0 3-OH, iso-C14:0, iso-C15:0, anteiso-C15:0, iso-C16:0 and summed feature 9 comprising (iso-C17:1 ω9c and/or 10 methyl C16:0); the prominent isoprenoid was Q-8 and the major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The G + C content of genomic DNA from strain KVB24T was determined to be 67.5 mol%. Based on the phenotypic, genotypic and chemotaxonomic analyses, strain KVB24T represents a novel species of the genus Lysobacter, for which the name Lysobacter caseinilyticus sp. nov. is proposed. The type strain is KVB24T (= KACC19816T = JCM32879T).