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1. (Article ID: 5361)
 
Tareq FS, Kim JH, Lee MA, Lee HS, Lee YJ, Lee JS, Shin HJ
Ieodoglucomides A and B from a marine-derived bacterium Bacillus licheniformis
Organic Letters 14(6) (2012) 1464-1467
 

Ieodoglucomides A (1) and B (2), unique glycolipopeptides consisting of an amino acid, a new fatty acid, a succinic acid, and a sugar, were isolated from a Marine-derived bacterium Bacillus licheniformis. The absolute stereochemistry of 1 and 2 was determined by deploying coupling constants, Marfey's and Mosher's methods, and literature reviews. Compounds 1 and 2 displayed moderate in vitro antimicrobial activity. Furthermore, ieodoglucomide B (2) exhibited cytotoxic activity against lung cancer and stomach cancer cell lines with GI(50) values of 25.18 and 17.78 μg/mL, respectively.

Bacillus licheniformis, antimicrobial activity, ieodoglucomides, glycolipopeptides, cytotoxic activity

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2. (Article ID: 5596)
 
Tareq FS, Lee HS, Lee YJ, Lee JS, Shin HJ
Ieodoglucomide C and ieodoglycolipid, new glycolipids from a marine-derived bacterium Bacillus licheniformis 09IDYM23
Lipids 50(5) (2015) 513(9)
 

Chemical examination of the ethyl acetate extract from the fermentation broth of the marine-derived bacterium Bacillus licheniformis resulted in the isolation of two new glycolipids, ieodoglucomide C (1) and ieodoglycolipid (2). The structural characterization of 1 and 2 was achieved by extensive spectroscopic evidence, including 2D NMR experiments. A combination of chemical derivatization techniques followed by NMR studies, LC-MS data analysis and a literature review was deployed for the establishment of the stereo-configurations of 1 and 2. Compounds 1 and 2 exhibited good antibiotic properties against Staphylococcus aureus, Bacillus subtilis, Bacillus cereus, Salmonella typhi, Escherichia coli and Pseudomonas aeruginosa with MICs ranging from 0.01 to 0.05 μM. Furthermore, the antifungal activity of 1 and 2 was evaluated against plant pathogenic fungi Aspergillus niger, Rhizoctonia solani, Botrytis cinerea and Colletotrichum acutatum as well as the human pathogen Candida albicans. Compounds 1 and 2 inhibited the mycelial growth of these pathogens with MIC values of 0.03-0.05 μM, revealing that these compounds are good candidates for the development of new fungicides

Bacillus licheniformis, glycolipopeptide, monoacyldiglycosylglycerolipid, stereoconfiguration, antimicrobial properties

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