title: Characterization of Micrococcus antarcticus sp. nov., a psychrophilic bacterium from Antarctica.
abstract: A Gram-positive, cold-adapted, aerobic, spherical actinobacterium (strain T2T) with a quite low cardinal growth temperature was isolated from Chinese Great-Wall station in Antarctica. Sequence comparisons of the 16S rDNA indicated the isolate to be a phylogenetic member of the genus Micrococcus, family Micrococcaceae, in which it represents a novel lineage. The phylogenetic distinctness of the isolate with respect to the type strains Micrococcus luteus and Micrococcus lylae was supported by DNA-DNA similarity values of less than 40%. Chemotaxonomic properties supported the placement of the isolate in the genus Micrococcus. The diagnostic diamino acid of the cell-wall peptidoglycan is lysine. The predominant menaquinones are MK-8 and MK-8(H2). The G + C content of the DNA of the isolate is 66.4 mol%. Genotypic, morphological and physiological characteristics were used to describe a new species of Micrococcus, for which the name Micrococcus antarcticus is proposed. The type strain is T2T (= AS 1.2372T).
authors.forename: H
authors.initials: H
authors.lastname: Liu
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: Y
authors.initials: Y
authors.lastname: Ma
authors.forename: P
authors.initials: P
authors.lastname: Zhou
mesh_terms: D000596:Amino Acids / Q000032:analysis; D000864:Antarctic Regions; D001482:Base Composition; D003080:Cold Temperature; D003470:Culture Media; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D020459:Genes, rRNA; D005838:Genotype; D006595:Hexosamines / Q000032:analysis; D008239:Lysine / Q000032:analysis; D008837:Micrococcus / Q000737:chemistry / Q000145:classification* / Q000235:genetics / Q000502:physiology*; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010457:Peptidoglycan / Q000737:chemistry; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D000596:Amino Acids; D003470:Culture Media; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D006595:Hexosamines; D010457:Peptidoglycan; D012336:RNA, Ribosomal, 16S; C008322:mannosamine; D008239:Lysine