Abstract
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 degrees 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)omega7c 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)).
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