Deinococcus pantiae sp. nov., a UV-resistant bacterium isolated from a lake in Schirmacher Oasis, Antarctica

A novel UV-resistant, red-pigmented, Gram-stain-positive, aerobic, non-motile, coccoid bacterial strain, designated SM5_A1^T, was isolated from lake sediment collected from Schirmacher Oasis, Queen Maud Land, Antarctica. The phylogenetic analysis, based on the 16S rRNA gene sequence, showed that the strain SM5_A1^T was closely related to <i>Deinococcus saxicola</i> DSM 15974^T (98.39%), <i>Deinococcus frigens</i> DSM 12807^T (97.69%) and <i>Deinococcus marmoris</i> DSM 12784^T (97.06%). The overall genome-related indices revealed <i>D. marmoris</i> DSM 12784^T as the phylogenetically nearest relative with an average nucleotide identity of 89.69%, an average amino acid identity of 92.14% and a digital DNA-DNA hybridization of 38.3%. The DNA G+C content of the isolate was 64.05 mol%, while the predominant respiratory quinone was menaquinone 8 (MK-8). The major cellular fatty acids were summed feature 3 (C_16:1 <i> ω7c</i>/C_16:1 <i>ω6c</i>), C_15:1 <i>ω6c</i>, C_16:0, summed feature 9 (C_17:1 iso <i>ω9c</i>) and C_15:0 iso. The prominently detected polar lipids were aminolipids, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphoglycolipids and phosphatidylglyceroylalkylamine. Based on the phenotypic, phylogenetic and chemotaxonomic data, the strain SM5_A1^T represents a novel species in the genus <i>Deinococcus</i> for which the name <i>Deinococcus pantiae</i> is proposed. The type strain is SM5_A1^T (MCC 5347^T=JCM 36669^T=KCTC 43670^T).