期刊
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
卷 55, 期 -, 页码 2075-2079出版社
MICROBIOLOGY SOC
DOI: 10.1099/ijs.0.63706-0
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A novel xylan-degrading bacterium, S3-E-T was isolated from the biofilm of a membrane bioreactor. The cells of this strain were Gram-positive, non-motile, non-spore-forming rods, produced primary branches and formed yellow colonies on nutrient agar. The strain had chemotaxonomic markers that were consistent with classification in the genus Microbacterium, i.e. MK-12, MK-11 and MK-13 as the major menaquinones, predominant iso- and anteiso-branched cellular fatty acids, glucose and galactose as the cell-wall sugars, peptidoglycan-type B2 beta with glycolyl residues and a DNA G + C content of 69(.)7 mol%. Phylogenetic analysis, based on 16S rRNA gene sequencing, showed that strain S3-E-T is Most similar to Microbacterium hominis IFO 15708(T) and Microbacterium foliorum DSM 12966(T) (97(.)6 and 97(.)4% sequence similarity, respectively), and that it forms a separate lineage with M. hominis in the genus Microbacterium. DNA-DNA hybridization results and phenotypic properties showed that strain S3-E-T could be distinguished from all known Microbacterium species and represented a novel species, for which the name Microbacterium xylanilyticum sp. nov. is proposed; the type strain is S3-E-T (=DSM 16914(T) = KCTC 19079(T)).
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