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  • Title: Characterization of an O-desmethylangolensin-producing bacterium isolated from human feces.
    Author: Yokoyama S, Niwa T, Osawa T, Suzuki T.
    Journal: Arch Microbiol; 2010 Jan; 192(1):15-22. PubMed ID: 19904524.
    Abstract:
    A bacterium that converted daidzein to O-desmethylangolensin was isolated from the feces of healthy humans. It was an obligately anaerobic, nonsporeforming, nonmotile and Gram-positive rod. The isolate used glucose, sucrose, raffinose, maltose, and fructose as carbon sources. It did not hydrolyze gelatin, esculin, or starch. The strain was urease, acid phosphatase, and arginine dihydrolase positive. It was catalase, oxidase, H(2)S, and indole negative. The major products of glucose fermentation were butyrate and lactate. Its mol% G+C was 51.2. The major cellular fatty acids were C(16:0) DMA, C(16:0), and C(16:0) aldehyde. The structural type of cell wall peptidoglycan was suggested to be A1gamma. The isolate was susceptible to beta-lactam, cefem, and macrolide antibiotics and resistant to aminoglycoside and quinolone antibiotics. The bacterium was related to Eubacterium ramulus ATCC29099(T), Eubacterium rectale ATCC33656(T), and species of the genus Roseburia, but the highest 16S rRNA gene similarity to these described species was only 94.4%, consistent with its being classified as a novel genus. Based on the above, the isolate, named strain SY8519, was identified as belonging to a novel genus in the Clostridium rRNA cluster XIVa.
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