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Winogradskyella exilis sp. nov., isolated from the starfish Stellaster equestris, and emended description of the genus Winogradskyella

By Elena P. Ivanova, Richard Christen, Nataliya M. Gorshkova, Natalia V. Zhukova, Valeriya Kurilenko, Russell J. Crawford and Valery V. Mikhailov


A pale yellowish pigmented non motile strain 022-2-26T was isolated from a starfish Stellaster equestris. Gram-negative, short rod-shaped, nonmotile bacterium was chemoorganotrophic, alkalitolerant, and mesophilic. The type strain 022-2-26T contained MK-6 as the predominant menaquinone. The major cellular fatty acids were iso-15:0, iso-15:1, 15:0, iso-15:0-2OH and iso-17:0-3OH (together representing 86.4% of the total fatty acids). The DNA base composition was 30.1 mol% GC. A 16S rRNA gene sequence of the type strain 022-2-26T was determined and phylogenetic analyses revealed that 022-2-26T formed a robust clade (confirmed by neighbor-joining, parsimony and maximum-likelihood algorithms and 95% of bootstrap replication) with species of the genus Winogradskyella. The closest related species was Winogradskyella poriferorum UST030701-295T showing a similarity of 96% (59 differences between sequences). On the basis of the phenotypic, chemotaxonomic characteristics and phylogenetic evidence, it is suggested that the bacteria be classified as a novel species, Winogradskyella exilia sp. nov. The type strain is 022-2-26T (KMM 6013T = CIP 109976T)

Topics: Bacterium, Star fish, Stellaster equestris, Winogradskyella exilia sp. nov, 0603 Evolutionary Biology, 0605 Microbiology, 1108 Medical Microbiology
Publisher: Society for General Microbiology
Year: 2010
DOI identifier: 10.1099/ijs.0.012476-0
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