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Gaetbulimicrobium brevivitae gen. nov., sp. nov., a novel member of the family Flavobacteriaceae isolated from a tidal flat 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, non-spore-forming and rod-shaped gliding bacterium, designated strain SMK-19^T, was isolated from a tidal flat sediment of the Yellow Sea, Korea, and its taxonomic position was investigated by using a polyphasic approach. Strain SMK-19^T grew optimally at 37 °C, in the presence of 2–3 % (w/V) NaCl and at pH 7·0–8·0. It contained MK-6 as the predominant menaquinone, and iso-C_{17 : 0} 3-OH and iso-C_{15 : 0} as the major fatty acids. Major polar lipids were phosphatidylethanolamine, unidentified phospholipids and an amino-group-containing lipid that is ninhydrin-positive. The DNA G+C content was 36·0 mol%. Phylogenetic analyses based on 16S rRNA gene sequences demonstrated that strain SMK-19^T formed a distinct evolutionary lineage within the family Flavobacteriaceae. The 16S rRNA gene sequence of strain SMK-19^T exhibited similarity values of <94·4 % to those of other members of the family Flavobacteriaceae. Strain SMK-19^T was distinguished from phylogenetically related genera by differences in several phenotypic properties. On the basis of phenotypic, phylogenetic and chemotaxonomic data, SMK-19^T (=KCTC 12390^T=DSM 17196^T) was classified at the type strain of a novel genus and species, Gaetbulimicrobium brevivitae gen. nov., sp. nov.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain SMK-19^T is AY987367.

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