Work

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

Year: 2026

Type: article

Abstract: 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 Deinococcus saxicola DSM 15974 T (98.39%), Deinococcus frigens DSM 12807 T (97.69%) and Deinococcus marmoris DSM 12784 T (97.06%). The overall genome-related indices revealed D. marmoris 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 ω7c /C 16:1 ω6c ), C 15:1 ω6c , C 16:0 , summed feature 9 (C 17:1 iso ω9c ) 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 Deinococcus for which the name Deinococcus pantiae is proposed. The type strain is SM5_A1 T (MCC 5347 T =JCM 36669 T =KCTC 43670 T ).

Source: INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY

DOI: 10.1099/ijsem.0.007071