1887

Abstract

During a study intended to screen for agar-degrading bacteria, strain M2-5 was isolated from black sand off the shore of Jeju Island, Republic of Korea. Strain M2-5 exhibited agarase activity; the β-agarase gene of the isolate had 62 % amino acid sequence identity to the β-agarase gene of JAMB A94. The isolate was closely related to members of the genus but was clearly discernible from reported species, based on a polyphasic analysis. Cells of strain M2-5 were Gram-negative, catalase- and oxidase-positive, motile rods. The DNA G+C content was 53.3 mol%. The predominant isoprenoid quinone was Q-8. The major cellular fatty acids were Cω8 (25.9 %), summed feature 3 (iso-C 2-OH and/or Cω7; 17.2 %) and C (15.0 %). Phylogenetic analysis using 16S rRNA gene sequences showed that strain M2-5 had 96.6 % gene sequence similarity to SA1, the most closely related type strain of the genus . These results suggest that strain M2-5 represents a novel species in the genus , for which the name sp. nov. is proposed; the type strain is M2-5 ( = KCTC 23293 = NCAIM B 02424).

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2012-04-01
2019-10-21
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