Aurantimonas marianensis sp. nov., isolated from deep-sea sediment of the Mariana Trench.

A novel strain, designated as LRZ36, was isolated from deep-sea sediment (from a depth of 5400 m) from the Mariana Trench. Cells of this strain are rod-shaped, Gram-stain-negative, strictly aerobic and non-motile. Phylogenetic analysis of LRZ36 based on 16S rRNA gene sequences revealed a lineage in the family but distinct from the most closely related species CGMCC 1.17725, '' KCTC 12094 and DSM 14790 with sequence identities of 99.4 %, 98.0 and 97.9 %, respectively. The genome of LRZ36 was 3.8 Mbp in size with a DNA G+C content of 64.8 %, containing 3623 predicted coding genes. LRZ36 showed average nucleotide identity values of 89.8 %, 78.7 and 78.5 % and digital DNA-DNA hybridization values of 38.9 %, 21.7 and 21.6 % with CGMCC 1.17725, '' KCTC 12094 and DSM 14790, respectively. The major respiratory quinone was ubiquinone-10 (Q-10), and the predominant fatty acids were Cω7 (74.4 %) and C (12.1 %). The polar lipids in LRZ36 are diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylmethylethanolamine, phosphatidylcholine, phosphatidylinositol mannoside, an unidentified aminophospholipid, three unidentified lipids, three unidentified phospholipids and two unidentified aminolipids. On the basis of genotypic and phenotypic evidence, LRZ36 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is LRZ36 (= KCTC 92065 = GDMCC 1.2985=MCCC 1K07227).