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Int J Syst Evol Microbiol 59 (2009), 65-68; DOI  10.1099/ijs.0.000794-0
© 2009 International Union of Microbiological Societies

Lewinella antarctica sp. nov., a marine bacterium isolated from Antarctic seawater

Hyun-Myung Oh, Kiyoung Lee and Jang-Cheon Cho

Division of Biology and Ocean Sciences, Inha University, Incheon 402-751, Republic of Korea

Correspondence
Jang-Cheon Cho
chojc{at}inha.ac.kr

A marine bacterium, designated IMCC3223T, was isolated from Antarctic coastal seawater and subjected to a polyphasic taxonomic investigation. Cells of the strain were Gram-negative, short to elongated rods that were orange-coloured but negative for flexirubin-type pigments, obligately aerobic, chemoheterotrophic and devoid of gliding or flagellar motility. On the basis of 16S rRNA gene sequence comparisons, the strain was closely related to members of the genus Lewinella (86.3–93.1 %) of the family ‘Saprospiraceae’ in the phylum Bacteroidetes; the most closely related species was Lewinella lutea (93.1 % similarity to the type strain). The DNA G+C content of the strain was 50.3 mol% and the major respiratory quinone was MK-7. The predominant cellular fatty acids were C16 : 1{omega}7c/iso-C15 : 0 2-OH (39.4 %), iso-C15 : 0 (15.9 %), C17 : 1{omega}7c (10.5 %) and C15 : 1{omega}6c (8.9 %). 16S rRNA gene sequence analyses and the phenotypic and chemotaxonomic tests allowed the differentiation of strain IMCC3223T from all recognized species of the genus Lewinella. Therefore, strain IMCC3223T represents a novel species of the genus Lewinella, for which the name Lewinella antarctica sp. nov. is proposed. The type strain is IMCC3223T (=KCCM 42688T =NBRC 103142T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain IMCC3223T is EF554367.

A transmission electron micrograph of cells of strain IMCC3223T and details of the cellular fatty acid compositions of strain IMCC3223T and type strains of species of the genus Lewinella are available as supplementary material with the online version of this paper.






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