期刊
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
卷 22, 期 24, 页码 7322-7325出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2012.10.082
关键词
Metagenomic library; Antibacterial activity; Marine sponge; beta-Hydroxy fatty acid
资金
- Mitsubishi Foundation
- Strategic Research Foundation
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- China Scholarship Council
- Grants-in-Aid for Scientific Research [24710253, 23710250] Funding Source: KAKEN
Functional screening based on the antibacterial activity of a metagenomic library of the Japanese marine sponge, Discodermia calyx, afforded three beta-hydroxyl fatty acids: 3-hydroxypalmitic acid, 3-hydroxylauric acid and 3-hydroxymyristic acid, heterologously expressed in an antibacterial clone, pDC113. 3-Hydroxy-palmitic acid showed moderate antibacterial activity against Bacillus cereus and Candida albicans. A sequence analysis of the insert DNA revealed 23 putative ORFs, with most sharing homology to bacterial fatty acid synthase II and lipid A biosynthesis enzymes. The other ORFs were probably transmembrane proteins involved in lipid A biosynthesis. Although lipid A was not detected under our experimental conditions, the production of b-hydroxyl fatty acids as components of lipid A were enhanced in pDC113. (C) 2012 Elsevier Ltd. All rights reserved.
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