title: Micrococcus flavus sp. nov., isolated from activated sludge in a bioreactor.
abstract: Bacterial strain LW4(T) was isolated from activated sludge of a wastewater-treatment bioreactor. Cells of strain LW4(T) were Gram-positive cocci, with a diameter of 0.7-1.0 microm. Colonies produced on LB agar plates were yellow, smooth, circular and 0.5-1.5 mm in diameter. Strain LW4(T) was aerobic and grew over the temperature range 26-34 degrees C and pH range 5-9, with optimal growth at 30.5-31.5 degrees C and pH 6.0-6.2. The cell-wall peptidoglycan of strain LW4(T) contained amino acid residues of lysine, glutamic acid, alanine, glycine and aspartic acid. The most abundant cellular fatty acids of strain LW4(T) were anteiso-C(15 : 0) (32.15 %) and iso-C(15 : 0) (31.65 %). Major respiratory quinones were MK-8(H(2)) (57.3 %) and MK-7(H(2)) (32.9 %). The DNA G+C content was 71.4 mol% (T(m)). 16S rRNA gene sequence analysis indicated that strain LW4(T) was phylogenetically related to members of the genus Micrococcus, with similarities ranging from 96.5 to 97.3 %. Levels of DNA-DNA relatedness of strain LW4(T) to Micrococcus luteus DSM 20030(T), Micrococcus lylae DSM 20315(T) and Micrococcus antarcticus AS 1.2372(T) were 55, 48 and 36 %, respectively. Based on these results, it is concluded that strain LW4(T) represents a novel species of the genus Micrococcus, for which the name Micrococcus flavus sp. nov. is proposed. The type strain is strain LW4(T) (=CGMCC 1.5361(T)=JCM 14000(T)).
authors.affiliation: Graduate University of Chinese Academy of Sciences, Beijing 100049, China.|State Key Laboratory of Microbial Resource, Institute of Microbiology, Chinese Academy of Sciences, Zhong-Guan-Cun, Haidian, Beijing 100080, China.
authors.forename: Xing-Yu
authors.initials: XY
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Microbial Resource, Institute of Microbiology, Chinese Academy of Sciences, Zhong-Guan-Cun, Haidian, Beijing 100080, China.
authors.forename: Bao-Jun
authors.initials: BJ
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Microbial Resource, Institute of Microbiology, Chinese Academy of Sciences, Zhong-Guan-Cun, Haidian, Beijing 100080, China.
authors.forename: Cheng-Ying
authors.initials: CY
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Microbial Resource, Institute of Microbiology, Chinese Academy of Sciences, Zhong-Guan-Cun, Haidian, Beijing 100080, China.
authors.forename: Shuang-Jiang
authors.initials: SJ
authors.lastname: Liu
mesh_terms: D001482:Base Composition; D019149:Bioreactors / Q000382:microbiology*; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000032:analysis; D020459:Genes, rRNA; D008837:Micrococcus / Q000737:chemistry / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010641:Phenotype; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012722:Sewage / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S; D012722:Sewage