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Gaetbulibacter saemankumensis gen. nov., sp. nov., a novel member of the family Flavobacteriaceae isolated from a tidal flat sediment in Korea

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

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

Three Gram-negative, yellow-pigmented, rod-shaped bacterial strains, SMK-12^T, SMK-36 and SMK-45, were isolated from a tidal flat sediment of the Yellow Sea in Korea, and their taxonomic positions were investigated by a polyphasic approach. The three strains grew optimally at 25–30 °C and in the presence of 2–3 % (w/v) NaCl. They contained MK-6 as the predominant menaquinone. The major cellular fatty acids were iso-C_{15 : 0}, iso-C_{17 : 0} 3-OH, iso-C_{15 : 1}, anteiso-C_{15 : 0}, iso-C_{15 : 0} 3-OH and C_{16 : 1}7c and/or iso-C_{15 : 0} 2-OH. The DNA G+C contents of the three strains were 34·7–34·9 mol%. The phylogenetic tree based on 16S rRNA gene sequences revealed that the three strains form one distinct evolutionary lineage supported by a bootstrap value of 100 % within the family Flavobacteriaceae. The three strains exhibited 16S rRNA gene sequence similarity levels of 93·8–94·9 % to the nearest phylogenetic neighbours, the genera Algibacter, Bizionia and Formosa. On the basis of differences in phenotypic characteristics and phylogenetic distinctiveness, strains SMK-12^T, SMK-36 and SMK-45 were classified in a novel genus and species, for which the name Gaetbulibacter saemankumensis gen. nov., sp. nov. is proposed. The type strain for the novel species is SMK-12^T (=KCTC 12379^T=DSM 17032^T).

Published online ahead of print on 22 April 2005 as DOI 10.1099/ijs.0.63738-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains SMK-12^T, SMK-36 and SMK-45 are AY883937, AY883938 and AY883939, respectively.

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