Sphingobacterium hungaricum sp. nov. a novel species on the borderline of the genus Sphingobacterium

Tóth, Ákos and Máté, Rózsa and Kutasi, József and Tóth, Erika and Bóka, Károly and Táncsics, András and Nagy, István and Kosztik, Judit and Bata-Vidács, Ildikó and Kukolya, József (2021) Sphingobacterium hungaricum sp. nov. a novel species on the borderline of the genus Sphingobacterium. INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY. ISSN 1466-5026 (In Press)

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Abstract

A Gram-reaction-negative bacterial strain, designated Kb22 T , was isolated from agricultural soil and characterised using a polyphasic approach to determine its taxonomic position. On the basis of 16S rRNA gene sequence analysis, the strain shows highest similarity (94.39%) with Sphingobacterium nematocida M-SX103 T . The highest ANI (71.83%) value was found with Sphingobacterium composti T5-12 T , and the highest AAI (66.65%) value was found with Sphingobacterium olei HAL-9 T . Cells are aerobic, non-motile rods. The isolate was found to be positive for catalase and oxidase tests. The assembled genome of strain Kb22 T has a total length of 4,06 Mb, the DNA G+C content is 38.1 mol%. The only isoprenoid quinone is menaquinone 7 (MK-7). The major fatty acids are iso-C 15:0 (28.4%), summed feature 3 (C 16:1 ω 7 c and/or iso-C 15:0 2-OH) (25.7%) and iso-C 17:0 3-OH (19.7%). Based on phenotypic characteristics and phylogenetic analysis, it is concluded that strain Kb22 T is a member of the genus Sphingobacterium and represents a novel species, for which the name Sphingobacterium hungaricum sp. nov. is proposed. The type strain of the species is strain Kb22 T (=LMG 31574 = NCAIM B.02638)

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