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Published online ahead of print on 19 June 2009 as doi:ijs.0.007591-0
International Journal of Systematic and Evolutionary Microbiology 2009;59:1738.

Int J Syst Evol Microbiol (2009); DOI 10.1099/ijs.0.007591-0
© 2009 International Union of Microbiological Societies
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Microbacterium insulae sp. nov., isolated from soil

Jung-Hoon Yoon1,3, Peter Schumann2, So-Jung Kang1, Chang-Soo Lee1, Soo-Young Lee1 and Tae-Kwang Oh1

1 KRIBB;
2 DSMZ

3 E-mail: jhyoon{at}kribb.re.kr

A Gram-positive, non-motile and rod- or coccoid-shaped Microbacterium-like bacterium, strain DS-66T, was isolated from a soil of Dokdo, Korea, and its exact taxonomic position was investigated by using a polyphasic approach. It grew optimally at 30 °C and pH 6.5-7.0 in the presence of 0.5-1.0 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain DS-66T belongs to the genus Microbacterium. Strain DS-66T had the peptidoglycan type based on B2β with partial substitution of glutamic acid by 3-hydroxy glutamic acid, Glu/Hyg-Gly-D-Orn, and galactose, rhamnose and ribose as the whole-cell sugars. The acyl type was glycolyl. It contained MK-13, MK-12 and MK-14 as the predominant menaquinones and anteiso-C15:0, anteiso-C17:0, iso-C17:0 and iso-C16:0 as the major fatty acids. Major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, an unidentified phospholipid and an unidentified glycolipid. The DNA G+C content was 69.9 mol%. The phylogenetic distinctiveness, DNA-DNA relatedness data and differential phenotypic properties of strain DS-66T demonstrated that this strain is distinguishable from recognized Microbacterium species. On the basis of the data presented, strain DS-66T represents a novel species of the genus Microbacterium, for which the name Microbacterium insulae sp. nov. is proposed. The type strain is DS-66T (= KCTC 19247T = CCUG 54523T).






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