Characterization of lysocardiolipin from Acinetobacter sp. HO1-N.
Triacyl-lysocardiolipin (triacyl-LCL) and diacyl-LCL were isolated from Acinetobacter sp. HO1-N, and their structures were determined by chemical, physical, and enzymatic procedures. Deacylation of triacyl-LCL and diacyl-LCL yielded bis-glycerylphosphorylglycerol. Periodate oxidation of both lysolipids was negative. Diglyceride and 2-monoglyceride resulted from the acetic acid hydrolysis of triacyl-LCL, whereas 2-monoglyceride was the sole product obtained from diacyl-LCL. Cardiolipin (CL)-specific phospholipase D treatment of triacyl-LCL yielded lysophosphatidylglycerol and phosphatidic acid. Pancreatic lipase treatment of CL yielded triacyl-LCL and diacyl-LCL. 31P nuclear magnetic resonance spectrometry showed two resonance peaks separated by 40 HZ for CL, two overlapping peaks separated by 14 HZ for triacyl-LCL, and one peak for diacyl-LCL. The proportion of lysocardiolipin increased as a function of cell age, representing 2 to 3% of the total phospholipids in early- and mid-exponential growth, 5 to 7% in late-exponential growth, and 12% in the stationary growth phase.
D000150:Acinetobacter / Q000032:analysis* / Q000254:growth & development; D002308:Cardiolipins / Q000032:analysis* / Q000378:metabolism; D055598:Chemical Phenomena; D002621:Chemistry; D006868:Hydrolysis; D008049:Lipase / Q000494:pharmacology; D010740:Phospholipases / Q000494:pharmacology
D002308:Cardiolipins; D010740:Phospholipases; D008049:Lipase