RT Journal Article SR Electronic(1) A1 LABRENZ, MATTHIAS A1 COLLINS, M. DAVID A1 LAWSON, PAUL A. A1 TINDALL, BRIAN J. A1 BRAKER, GESCHE A1 HIRSCH, PETERYR 1998 T1 Antarctobacter heliothermus gen. nov., sp. nov., a budding bacterium from hypersaline and heliothermal Ekho Lake JF International Journal of Systematic and Evolutionary Microbiology, VO 48 IS 4 SP 1363 OP 1372 DO https://doi.org/10.1099/00207713-48-4-1363 PB Microbiology Society, SN 1466-5034, AB Four Gram-negative, aerobic, pointed and budding bacteria were isolated from various depths of the hypersaline, heliothermal and meromictic Ekho Lake (Vestfold Hills, East Antarctica). The cells contained storage granules and formed rosettes. Daughter cells may be motile. Growth required sodium ions. Nitrate was reduced to nitrite, and dissimilatory reduction of nitrite was possible. DNase and gelatinase were produced. Glutamate was metabolized with and without an additional source of combined nitrogen. The most abundant fatty acid was C18:1; other fatty acids present in lower concentrations were C12:1 3-OH, C16:1, C16:0, C18:0 and C19:0 eye. The main polar lipids were phosphatidylglycerol and phosphatidylcholine. The DNA base composition was 62·3–62·8 mol% G+C. 16S rDNA sequence comparisons showed the isolates to be phylogenetically related to the genera Sagittula and Roseobacter. Morphological, physiological and genotypic differences to these and distinct characteristics supported the description of a new genus and a new species, Antarctobacter heliothermus gen. nov., sp. nov. The type strain is EL-219T (= DSM 11445T)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-48-4-1363