JOURNAL ARTICLE

Flavobacterium sasangense sp. nov., isolated from a wastewater stream polluted with heavy metals

Hwan Sik Yoon, Zubair Aslam, Geun Cheol Song, Seon Won Kim, Che Ok Jeon, Tae Soo Chon, Young Ryun Chung
International Journal of Systematic and Evolutionary Microbiology 2009, 59: 1162-6
19406812
A Gram-negative, rod-shaped bacterium, designated strain YC6274(T), was isolated from a stream (Sasang) carrying wastewater polluted with heavy metals in Busan, Korea. Growth was observed at 10-35 degrees C (optimum, 30 degrees C) and pH 6.0-9.5 (optimum, pH 7.5-8.0). Comparative 16S rRNA gene sequence analyses showed that the strain was most closely related to Flavobacterium cucumis R2A45-3(T) (96.6 % similarity), F. aquatile ATCC 11947(T) (93.7 %), F. croceum EMB47(T) (93.3 %), F. indicum GPTSA100-9(T) (93.3 %) and F. terrigena DS-20(T) (93.2 %). Sequence similarities with strains of other Flavobacterium species with validly published names were lower than 93.0 %. Phylogenetic analysis based on the 16S rRNA gene sequence showed that strain YC6274(T) formed a distinct phyletic lineage within the genus Flavobacterium. The predominant fatty acids of strain YC6274(T) were iso-C(15 : 0), iso-C(16 : 0), iso-C(15 : 1) G, iso-C(17 : 0) 3-OH, iso-C(16 : 0) 3-OH and iso-C(15 : 0) 3-OH. The G+C content of the genomic DNA was 32.5 mol% and the major quinone was MK-6. On the basis of phenotypic, chemotaxonomic and molecular data, it is clear that strain YC6274(T) represents a novel species within the genus Flavobacterium, for which the name Flavobacterium sasangense sp. nov. is proposed. The type strain is YC6274(T) (=KCTC 22246(T) =DSM 21067(T)).

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