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Arthrobacter antarcticus sp. nov., isolated from a sediment from the Antarctic sea

CCMB

¹ E-mail: shivas{at}ccmb.res.in

The bacterial strain SPC26^T was isolated from a sediment sample from the Antarctic sea. The strain is Gram-positive, catalase positive and contains lysine and alanine in the peptidoglycan. Major cellular fatty acid are anteiso-C15:0 (54.92%), iso-C15:0 (11.47%), anteiso-C17:0 (6.48%), anteiso-C15:1 (6.38%), and the major menaquinones are MK-8, MK-9 and MK-10. Mol % G + C content is 68±0.5 and contains phosphatidylethanolamine and diphosphatidylglycerol as major polar lipids. Based on the 16S rRNA gene sequence similarity the nearest phylogenetic neighbours of SPC26^T were identified as Arthrobacter gangotriensis DSM 15796^T, Arthrobacter sulfureus DSM 20167^T, Arthrobacter psychrophenolicus DSM 15454^T and Arthrobacter kerguelensis DSM 15797^T respectively. SPC26^T showed 36%, 21%, 12% and 10% DNA-DNA relatedness with the above nearest phylogenetic neighbours. Therefore, on the basis of 16S rRNA gene sequence comparisons, phylogenetic analysis, phenotypic characteristics and DNA-DNA relatedness study, it is proposed that the strain is a represents a novel species of Arthrobacter, for which the name Arthrobacter antarcticus sp. nov. is proposed with SPC26^T as the type strain (LMG 24542^T =NCCB 100228^T)