Nesterenkonia halophila sp nov., a moderately halophilic, alkalitolerant actinobacterium isolated from a saline soil

A Gram-positive, non-motile, moderately halophilic, alkalitolerant actinobacterium, designated strain YIM 70179(T), was isolated from a saline soil sample collected from Xinjiang Province, northwest China, and was subjected to a polyphasic taxonomic study. The cell-wall peptidoglycan type of strain YIM 70179(T) was A4 alpha, L-Lys-Gly-L-Glu. Cells of the isolate contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and an unknown glycolipid, MK-8 as major menaquinone and anteiso-C-15:0, anteiso-C-17:0 and iso-C-16:0 as major fatty acids. The DNA G + C content was 68.4 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain YIM 70179(T) fell within the radiation of species of the genus Nesterenkonia. Levels of 16S rRNA gene sequence similarity between strain YIM 70179(T) and the type strains of recognized Nesterenkonia species were below 97%, except to Nesterenkonia halobia DSM 20541(T) (99.6%), but these two strains exhibited a low level of DNA-DNA relatedness (18.4%). Based on genetic and phenotypic evidence, it is proposed that strain YIM 70179(T) represents a novel species of the genus Nesterenkonia, for which the name Nesterenkonia halophila sp. nov. is proposed. The type strain is YIM 70179(T) (=DSM 16378(T) =KCTC 19048(T)).