Journal of Microbiology

Research Support, Non-U.S. Gov't

Sphingopyxis granuli sp. nov., a [beta]-Glucosidase-Producing Bacterium in the Family Sphingomonadaceae in [alpha]-4 Subclass of the Proteobacteria: Myung Kyum Kim , Wan-Taek Im , Hiroyuki Ohta , Myungjin Lee , Sung-Taik Lee; J. Microbiol. 2005;43(2):152-157.; DOI: https://doi.org/2169 [pii]

Abstract: Strain Kw07^T, a Gram-negative, non-spore-forming, rod-shaped bacterium, was isolated from granules in an Up-flow Anaerobic Sludge Blanket (UASB) bioreactor used in the treatment of brewery wastewater. 16S rRNA gene sequence analysis revealed that strain Kw07^T belongs to the [alpha]-4 subclass of the Proteobacteria, and the highest degree of sequence similarity was determined to be to Sphingopyxis macrogoltabida IFO 15033^T (97.8%). Chemotaxonomic data revealed that strain Kw07^T possesses a quinone system with the predominant compound Q-10, the predominant fatty acid C_18:1 w7c, and sphingolipids, all of which corroborated our assignment of the strain to the Sphingopyxis genus. The results of DNA-DNA hybridization and physiological and biochemical tests clearly demonstrated that strain Kw07^T represents a distinct species. Based on these data, Kw07^T (= KCTC 12209^T = NBRC 100800^T) should be classified as the type strain for a novel Sphingopyxis species, for which the name Sphingopyxis granuli sp. nov. has been proposed.

Culture and Identification of Bacteria from Marine Biofilms: Yoo Kyung Lee , Kae-Kyung Kwon , Kyeung Hee Cho , Hyo Won Kim , Jae Hyun Park , Hong Kum Lee; J. Microbiol. 2003;41(3):183-188.

Abstract: We isolated and cultured bacteria that inhabited marine biofilms, and identified them by phylogenetic analysis using 16S rDNA sequences. In the marine environment, biofilms cover most subtidal and intertidal solid surfaces such as rocks, ships, loops, marine animals, and algae. The bacteria in most biofilms are embedded in extracellular polymeric substances that comprise mainly of exopolysaccharides. The exopolysaccharides are excreted from multiple bacterial species; therefore, biofilms are a good source for screening exopolysaccharide-producing bacteria. Thirty-one strains were cultured, and a total of 17 unique strains were identified. Phylogenetic analysis using 16S rDNA sequences indicated that the 17 strains belonged to [alpha]-Proteobacteria (Ochrobactrum anthropi, Paracoccus carotinifaciens); [gamma]-Proteobacteria (Pseudoalteromonas agarovorans, P. piscicida, Pseudomonas aeruginosa, Shewanella baltica, Vibrio parahaemolyticus, V. pomeroyi); CFB group bacteria (Cytophaga latercula, Tenacibaculum mesophilum); high GC, Gram-positive bacteria (Arthrobacter nicotianae, Brevibacterium casei, B. epidermidis, Tsukamurella inchonensis); and low GC, Gram-positive bacteria (Bacillus macroides, Staphylococcus haemolyticus, S. warneri).

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