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Mucilaginibacter kameinonensis sp., nov., isolated from garden soil

Makoto Urai^1,,, Tomoko Aizawa^1,, Yasuyoshi Nakagawa², Mutsuyasu Nakajima^1,3 and Michio Sunairi¹

¹ Department of Applied Biological Sciences, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-8510, Japan
² Biological Resource Center (NBRC), Department of Biotechnology, National Institute of Technology and Evaluation, 2-5-8 Kazusakamatari, Kisarazu, Chiba 292-0818, Japan
³ Environmental Program, Nihon University Advanced Research Institute for the Sciences and Humanities, 12-5 Goban-cho Chiyoda, Tokyo 102-8251, Japan

Correspondence
Michio Sunairi
sunairi.michio{at}nihon-u.ac.jp

An extracellular polysaccharide-producing bacterium, strain SCK^T, was isolated from a soil sample taken from Kameino, Fujisawa, Japan. The isolate was Gram-negative and cells were non-motile, irregular-shaped rods that grew optimally at 25 °C and grew between pH 5 and 8. Strain SCK^T contained MK-7 as the major isoprenoid quinone, iso-C_{15 : 0} and C_{16 : 1}7c and/or iso-C_{15 : 0} 2-OH as the major fatty acids and sphingolipids, with d-17 : 0 as the main dihydrosphingosine. Flexirubin-type pigments were also present. The DNA G+C content was 43.7 mol%. On the basis of 16S rRNA gene sequence analysis, strain SCK^T was shown to belong to the genus Mucilaginibacter. The 16S rRNA gene sequence similarity between strain SCK^T and the two type strains of Mucilaginibacter was 93 %. The results of physiological and biochemical tests allowed phenotypic differentiation of the strain from published Mucilaginibacter species. Therefore, strain SCK^T represents a novel species, for which the name Mucilaginibacter kameinonensis sp. nov. is proposed. The type strain is SCK^T (=NBRC 102645^T =KCTC 22227^T).

These authors contributed equally to this work.

Present address: RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain SCK^T is AB330392.

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