sp. nov., a bacterium isolated from lake sediment.

A novel bacterium, designated NAS39, was isolated from the interfacial sediment of Taihu Lake in PR China and its taxonomic position was investigated by using a polyphasic approach. Cells of the isolate were Gram-stain-negative, aerobic, non-motile, catalase-positive, yellow and rod-shaped. Phylogenetic analyses based on 16S rRNA gene sequences supported that strain NAS39 formed a cluster within the genus , and was most closely related to LB2P30 (98.4 %), followed by 0563 (97.4 %). The average nucleotide identity values between strain NAS39 and LB2P30 and 0563 were 82.5 and 75.3 %, respectively. The digital DNA-DNA hybridization values between strain NAS39 and LB2P30 and 0563 were 40.9 and 18.6 %, respectively. The genomic DNA G+C content was 34.1 mol%. The major respiratory quinone was menaquinone-6. The dominant cellular fatty acids were iso-C and summed feature 3 comprising C ω7/C ω6. The polar lipids comprised phosphatidyl ethanolamine, two amino lipids, three amino phospholipids and two unidentified lipids. Based on the phenotypic, chemotaxonomic, genotypic and phylogenetic characteristics, strain NAS39 (=MCCC 1K06094=KACC 22328) represents a novel species of the genus , for which the name sp. nov. is proposed.