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  • Title: Ornithine-containing lipids in Thiobacillus A2 and Achromobacter sp.
    Author: Thiele OW, Oulevey J, Hunneman DH.
    Journal: Eur J Biochem; 1984 Feb 15; 139(1):131-5. PubMed ID: 6698001.
    Abstract:
    20 bacterial strains (corresponding to 16 species) were screened for ornithine lipids. Only two species (Thiobacillus A2 and Achromobacter sp.) turned out to contain ornithine lipids (2.71 mmol/100 g and 0.38 mmol/100 g bacterial dry weight, respectively). In both ornithine lipids, a 3-hydroxy fatty acid was amide-linked to the alpha-amino group of ornithine, a normal fatty acid was ester-linked to the 3-hydroxy group of the former. The predominant fatty acids were 18:1(11) and 3-hydroxy-20:1(13) in Thiobacillus A2, 16:0 and 3-hydroxy-18:1(11) in Achromobacter sp. All monounsaturated fatty acids (with one exception) belonged to the (n-7) family. 11, 12-Epoxy octadecanoic acid was identified among the ester-linked fatty acids of Thiobacillus A2. Phosphatidylcholine was the principal phospholipid in both bacterial species.
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