Description of a Sulfitobacter Strain and Its Extracellular Cyclodipeptides
A marine bacterium M44 was separated from 30m deep seawater in the East China Sea (26° 28.3 N 122° 29.0 E) in 2006. 16S rDNA gene sequence comparison showed that the strain M44 was a member of the genus Sulfitobacter and highly similar to KMM 3554T. A series of experiments demonstrated that this strain M44 had many distinctive characteristics: its cells were gramnegative and mesophilic; its colonies were slightly yellowish, round, convex, and smooth; and it could grow at 10-28℃, pH 6.0- 10.0, and in the presence of 0-12.5% (w/v) NaCl; the optimum growth conditions were 25℃ and pH 7.0, and the optimum Na+ concentration was 2.5%. In addition, strain M44 contained 18 : 1ω7c, 11methyl 18 :1ω7c and 16 : 0 fatty acids as major fatty acids, and the genomic DNA G+C content was 58.04 mol%. According to our results of the secondary metabolites, six cyclodipeptides were isolated from the strain M44, which were Cyclo (Val-Leu), Cyclo (Phe-Val), Cyclo (Phe-Leu), Cyclo (Leu-Ile), Cyclo (Phe-Ile), and Cyclo (Trp-Pro). It is the first study of secondary metabolites isolated from this genus.
Cong Long Xiao-Ling Lu Yun Gao Bing-Hua Jiao Xiao-Yu Liu
Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Second Military Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Second Military
国际会议
青岛
英文
1-6
2010-10-09(万方平台首次上网日期,不代表论文的发表时间)