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Analysis of phospholipids and ornithine-containing lipids from Mesorhizobium spp
Authors:Choma Adam  Komaniecka Iwona
Affiliation:1. Department of Craniofacial Sciences, University of Connecticut School of Dental Medicine, Farmington, CT 06030, USA;2. From the Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060, USA;3. Department of Immunology and Medicine, University of Connecticut School of Medicine, Farmington, CT 06030, USA;4. Department of Oral Health and Diagnostic Sciences, University of Connecticut School of Dental Medicine, Farmington, CT 06030, USA;5. Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269, USA;6. Department of Reconstuctive Sciences, University of Connecticut School of Dental Medicine, Farmington, CT 06030, USA
Abstract:
Polar lipid compositions of seven strains belonging to the four species of the Mesorhizobium genus were described. The lipid patterns of Mesorhizobium strains were very similar. Only quantitative differences were observed. Diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), and phosphatidylcholine (PC) were found to be the major phospholipids of the analysed bacteria. In addition, two methylated derivatives of PE were observed: phosphatidyl-N,N-dimethylethanolamine (DMPE) and phosphatidyl-N-monomethylethanolamine (MMPE). Polar head groups of those phospholipids were predominately acylated with lactobacillic (19:0 cyclopropane) acid. Ornithine-containing lipid (OL) was also identified. 3-hydroxy fatty acids found in the lipid preparations were derived exclusively from the ornithine lipid. 3-hydroxylactobacillic was the main acyl residue amide linked to the ornithine.
Keywords:
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