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Sphingopyxis flavimaris sp. nov., isolated from sea water of the Yellow Sea in Korea

Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea

Correspondence
Jung-Hoon Yoon
jhyoon{at}kribb.re.kr

A Gram-negative, motile, yellow-pigmented, slightly halophilic bacterial strain, SW-151^T, was isolated from sea water of the Yellow Sea in Korea, and subjected to a polyphasic taxonomic study. The isolate grew optimally at 30 °C and in the presence of 2–3 % NaCl. Strain SW-151^T was characterized chemotaxonomically as having Q-10 as the predominant respiratory lipoquinone and C_{18 : 1}7c, C_{16 : 1}7c and/or iso-C_{15 : 0} 2-OH and C_{17 : 1}6c as the major fatty acids. Sphingoglycolipid, diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine were the major polar lipids. The DNA G+C content was 58 mol%. 16S rRNA gene sequence analysis showed that strain SW-151^T joins the evolutionary radiation enclosed by the genus Sphingopyxis. Similarities between the 16S rRNA gene sequences of strain SW-151^T and the type strains of Sphingopyxis species ranged from 92·3 to 94·3 %, which is low enough to categorize strain SW-151^T as a species distinct from previously described Sphingopyxis species. On the basis of phenotypic properties and phylogenetic distinctiveness, strain SW-151^T (=KCTC 12232^T=DSM 16223^T) should be classified as a novel Sphingopyxis species, for which the name Sphingopyxis flavimaris sp. nov. is proposed.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain SW-151^T is AY554010.

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