Three novel actinobacteria, strains 39T, 40 and 41, were isolated from soil collected from Barrientos Island in the Antarctic. The taxonomic status of these strains was determined using a polyphasic approach. Comparison of 16S rRNA gene sequences revealed that strain 39T represented a novel lineage within the family Dermacoccaceae and was most closely related to members of the genera Demetria (96.9 16S rRNA gene sequence similarity), Branchiibius (95.7 ), Dermacoccus (94.4-95.3 ), Calidifontibacter (94.6 ), Luteipulveratus (94.3 ), Yimella (94.2 ) and Kytococcus (93.1 ). Cells were irregular cocci and short rods. The peptidoglycan type was A4a with an L-Lys-L-Ser-D-Asp interpeptide bridge. The cell-wall sugars were galactose and glucose. The major menaquinone was MK-8(H4). The polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, phosphoglycolipid, two glycolipids and one unknown phospholipid. The acyl type of the cell-wall polysaccharide was N-acetyl. The major cellular fatty acids were anteiso-C17: 0 (41.97 ), anteiso-C17: 1?9c (32.16 ) and iso-C16: 0 (7.68 ). The DNA G+C content of strain 39T was 68.4 mol . On the basis of phylogenetic and phenotypic differences from other genera of the family Dermacoccaceae, a novel genus and species, Barrientosiimonas humi gen. nov., sp. nov., is proposed; the type strain of the type species is 39T (=CGMCC 4.6864T =DSM 24617T).
|Pages (from-to)||241 - 248|
|Number of pages||8|
|Journal||International Journal of Systematic and Evolutionary Microbiology|
|Issue number||Pt 1|
|Publication status||Published - 2013|