Flaviflexus salsibiostraticola sp. nov., an actinobacterium isolated from a biofilm reactor.

A Gram-stain-positive, aerobic, non-motile, non-spore-forming, cocci-shaped actinobacterium, designated strain EBR4-1-2(T), was isolated from a biofilm reactor in Korea. Comparative 16S rRNA gene sequence studies showed the isolate was clearly affiliated with the class Actinobacteria, and was related most closely to Flaviflexus huanghaiensis H5(T), showing 98.9 % similarity. Cells of strain EBR4-1-2(T) formed yellow colonies on R2A agar, contained MK-9(H4) as the predominant menaquinone, and included C18 : 1ω9c, C16 : 0, C16 : 1ω9c and C14 : 0 as the major fatty acids. The cell-wall peptidoglycan type was A5α (l-Lys-l-Ala-l-Lys-d-Glu). The G+C content of the genomic DNA of strain EBR4-1-2(T) was 65.6 mol%. Thus, the combined genotypic and phenotypic data supported the conclusion that strain EBR4-1-2(T) represents a novel species of the genus Flaviflexus, for which the name Flaviflexus salsibiostraticola sp. nov. is proposed. The type strain is EBR4-1-2(T) ( = KCTC 33148(T) = JCM 19016(T)).