会议专题

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

第九届国际海洋生物技术大会

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)