sp. nov., isolated from a marine alga ( sp.).

A novel Gram-stain-negative, rod-shaped, non-spore-forming, aerobic, motile bacterium with a single polar or subpolar flagellum, designated strain H3510, was isolated from marine alga collected on sea shore of Yantai, PR China. The organism grew optimally at 28 °C and pH 7.0 and in presence of 3.0 % (w/v) NaCl. The strain exhibited positive catalase activity but negative oxidase and nitrate reduction activities. The predominant cellular fatty acids were C 7 and/or C 6, 11-methyl C 7, and C. Additionally, the major polar lipids were phosphatidylglycerol, phosphatidylmonomethylethanolamine, diphosphatidylglycerol, and phosphatidylethanolamine; the respiratory quinone was ubiquinone 10 (Q-10). The genomic DNA G+C content of strain H3510 was 54.2%. The novel strain showed the closest relationship with KMM 9699 with 98.2 % 16S rRNA gene sequence similarity. The calculated values for average nucleotide identity and DNA-DNA hybridization between strain H3510 and the phylogenetically related species were in the range of 71.3-74.9 % and 13.7-19.9 %, respectively. Based on polyphasic analyses, strain H3510 was identified as representing a novel species of the genus , for which the name sp. nov. is proposed. The type strain is H3510 (=KCTC 8206=MCCC 1K04325). The heterologously expressed inositol 2-dehydrogenase gene from strain H3510 displayed high oxidation activity on -inositol and showed potential in the production of rare stereoisomers of inositol, such as -inositol.